From 9b9b12567492b4cb7145568743a4b87894c955a0 Mon Sep 17 00:00:00 2001
From: Ralph Amissah <ralph.amissah@gmail.com>
Date: Sun, 1 Aug 2021 10:31:25 -0400
Subject: track org config suggestions that require bespoke adjustment

---
 sundry/spine_search_cgi/src/spine_search.d_ | 1777 +++++++++++++++++++++++++++
 1 file changed, 1777 insertions(+)
 create mode 100644 sundry/spine_search_cgi/src/spine_search.d_

(limited to 'sundry/spine_search_cgi/src')

diff --git a/sundry/spine_search_cgi/src/spine_search.d_ b/sundry/spine_search_cgi/src/spine_search.d_
new file mode 100644
index 0000000..6bc8c67
--- /dev/null
+++ b/sundry/spine_search_cgi/src/spine_search.d_
@@ -0,0 +1,1777 @@
+/+ dub.sdl
+  name "spine search"
+  description "spine cgi search"
+  /+ obt - org-mode generated file +/
++/
+import std.format;
+import std.range;
+import std.regex;
+import arsd.cgi;
+import d2sqlite3;
+import std.process : environment;
+void cgi_function_intro(Cgi cgi) {
+  mixin(import("configuration.txt"));
+  string header;
+  string table;
+  string form;
+  struct Config {
+    string http_request_type;
+    string http_host;
+    // string server_name;
+    string web_doc_root_path;
+    string doc_collection_sub_root;
+    string cgi_root;
+    string cgi_script;
+    string data_path_html;
+    string db_path;
+    string query_string;
+    string http_url;
+    string request_method;
+  }
+  auto conf = Config(); // SET
+  conf.http_request_type       = environment.get("REQUEST_SCHEME",        "http");
+  conf.http_host               = environment.get("HTTP_HOST",             "localhost");
+  // conf.server_name             = environment.get("SERVER_NAME",           "localhost");
+  conf.web_doc_root_path       = environment.get("DOCUMENT_ROOT",         _cfg.doc_root_www);
+  conf.doc_collection_sub_root = _cfg.doc_root_www; // (output_path - web_doc_root_path)
+  // conf.doc_collection_sub_root = "/srv/www/spine/static"; // (output_path - web_doc_root_path) // problem FIX
+  conf.cgi_root                = environment.get("CONTEXT_DOCUMENT_ROOT", _cfg.doc_root_cgi);
+  // conf.cgi_script              = environment.get("SCRIPT_NAME",           "/cgi-bin/spine-search");
+  conf.query_string            = environment.get("QUERY_STRING",          "");
+  conf.http_url                = environment.get("HTTP_REFERER",          conf.http_request_type ~ "://" ~ conf.http_host ~ conf.cgi_script ~ "?" ~ conf.query_string);
+  conf.db_path                 = _cfg.doc_root_db; // (output_path + /sqlite)
+  conf.request_method          = environment.get("REQUEST_METHOD",        "POST");
+  struct CGI_val {
+    string db_selected      = "";
+    string sql_match_limit  = "";     // radio: ( 1000 | 2500 )
+    string sql_match_offset = "";
+    string search_text      = "";
+    string results_type     = "";     // index
+    bool   checked_echo     = false;
+    bool   checked_stats    = false;
+    bool   checked_url      = false;
+    bool   checked_searched = false;
+    bool   checked_tip      = false;
+    bool   checked_sql      = false;
+  }
+  auto cv = CGI_val();
+  cv.db_selected = _cfg.filename_db;
+  // cv.db_selected = "spine.search.db";
+  auto text_fields() {
+    string canned_query_str = environment.get("QUERY_STRING", "");
+    if ("query_string" in cgi.post) {
+      canned_query_str = environment.get("QUERY_STRING", "");
+    }
+    string[string] canned_query;
+    if (conf.request_method == "POST") {
+    } else if (conf.request_method == "GET") {
+      foreach (pair_str; canned_query_str.split("&")) {
+        // cgi.write(pair_str ~ "<br>");
+        string[] pair = pair_str.split("=");
+        canned_query[pair[0]] = pair[1];
+      }
+      // foreach (field, content; canned_query) {
+      //   cgi.write(field ~ ": " ~ content ~ "<br>");
+      // }
+    }
+    static struct Rgx {
+      // static canned_query   = ctRegex!(`\A(?P<matched>.+)\Z`,                            "m");
+      static search_text_area  = ctRegex!(`\A(?P<matched>.+)\Z`,                            "m");
+      // static fulltext       = ctRegex!(`\A(?P<matched>.+)\Z`,                            "m");
+      static line              = ctRegex!(`^(?P<matched>.+?)(?: ~|$)`,                      "m");
+      static text              = ctRegex!(`(?:^|\s~\s*)text:\s+(?P<matched>.+?)(?: ~|$)`,   "m");
+      static author            = ctRegex!(`(?:^|\s~\s*)author:\s+(?P<matched>.+)$`,         "m");
+      static title             = ctRegex!(`(?:^|\s~\s*)title:\s+(?P<matched>.+)$`,          "m");
+      static uid               = ctRegex!(`(?:^|\s~\s*)uid:\s+(?P<matched>.+)$`,            "m");
+      static fn                = ctRegex!(`(?:^|\s~\s*)fn:\s+(?P<matched>.+)$`,             "m");
+      static keywords          = ctRegex!(`(?:^|\s~\s*)keywords:\s+(?P<matched>.+)$`,       "m");
+      static topic_register    = ctRegex!(`(?:^|\s~\s*)topic_register:\s+(?P<matched>.+)$`, "m");
+      static subject           = ctRegex!(`(?:^|\s~\s*)subject:\s+(?P<matched>.+)$`,        "m");
+      static description       = ctRegex!(`(?:^|\s~\s*)description:\s+(?P<matched>.+)$`,    "m");
+      static publisher         = ctRegex!(`(?:^|\s~\s*)publisher:\s+(?P<matched>.+)$`,      "m");
+      static editor            = ctRegex!(`(?:^|\s~\s*)editor:\s+(?P<matched>.+)$`,         "m");
+      static contributor       = ctRegex!(`(?:^|\s~\s*)contributor:\s+(?P<matched>.+)$`,    "m");
+      static date              = ctRegex!(`(?:^|\s~\s*)date:\s+(?P<matched>.+)$`,           "m");
+      static results_type      = ctRegex!(`(?:^|\s~\s*)type:\s+(?P<matched>.+)$`,           "m");
+      static format            = ctRegex!(`(?:^|\s~\s*)format:\s+(?P<matched>.+)$`,         "m");
+      static source            = ctRegex!(`(?:^|\s~\s*)source:\s+(?P<matched>.+)$`,         "m");
+      static language          = ctRegex!(`(?:^|\s~\s*)language:\s+(?P<matched>.+)$`,       "m");
+      static relation          = ctRegex!(`(?:^|\s~\s*)relation:\s+(?P<matched>.+)$`,       "m");
+      static coverage          = ctRegex!(`(?:^|\s~\s*)coverage:\s+(?P<matched>.+)$`,       "m");
+      static rights            = ctRegex!(`(?:^|\s~\s*)rights:\s+(?P<matched>.+)$`,         "m");
+      static comment           = ctRegex!(`(?:^|\s~\s*)comment:\s+(?P<matched>.+)$`,        "m");
+      // static abstract_         = ctRegex!(`(?:^|\s~\s*)abstract:\s+(?P<matched>.+)$`,       "m");
+      static src_filename_base = ctRegex!(`^src_filename_base:\s+(?P<matched>.+)$`,         "m");
+    }
+    struct searchFields {
+      string canned_query      = ""; // GET  canned_query     == cq
+      string search_text_area  = ""; // POST search_text_area == tsa
+      string text              = ""; // text              == txt
+      string author            = ""; // author            == au
+      string title             = ""; // title             == ti
+      string uid               = ""; // uid               == uid
+      string fn                = ""; // fn                == fn
+      string keywords          = ""; // keywords          == kw
+      string topic_register    = ""; // topic_register    == tr
+      string subject           = ""; // subject           == su
+      string description       = ""; // description       == de
+      string publisher         = ""; // publisher         == pb
+      string editor            = ""; // editor            == ed
+      string contributor       = ""; // contributor       == ct
+      string date              = ""; // date              == dt
+      string format            = ""; // format            == fmt
+      string source            = ""; // source            == src sfn
+      string language          = ""; // language          == lng
+      string relation          = ""; // relation          == rl
+      string coverage          = ""; // coverage          == cv
+      string rights            = ""; // rights            == rgt
+      string comment           = ""; // comment           == cmt
+      // string abstract          = "";
+      string src_filename_base = ""; // src_filename_base == bfn
+      string results_type      = ""; // results_type      == rt     radio
+      string sql_match_limit   = ""; // sql_match_limit   == sml    radio
+      string sql_match_offset  = ""; // sql_match_offset  == smo
+      string stats             = ""; // stats             == sts    checked
+      string echo              = ""; // echo              == ec     checked
+      string url               = ""; // url               == url    checked
+      string searched          = ""; // searched          == se     checked
+      string sql               = ""; // sql               == sql    checked
+    }
+    auto rgx  = Rgx();
+    auto got  = searchFields();
+    if (environment.get("REQUEST_METHOD", "POST") == "POST") {
+      if ("sf" in cgi.post) {
+        got.search_text_area =  cgi.post["sf"];
+        if (auto m = got.search_text_area.matchFirst(rgx.text)) {
+          got.text = m["matched"];
+          got.canned_query ~= "sf=" ~ m["matched"];
+        } else if (auto m = got.search_text_area.matchFirst(rgx.line)) {
+          if (
+            !(m["matched"].matchFirst(rgx.author))
+            && !(m["matched"].matchFirst(rgx.title))
+          ) {
+            got.text = m["matched"];
+            got.canned_query ~= "sf=" ~ m["matched"];
+          }
+        }
+        if (auto m = got.search_text_area.matchFirst(rgx.author)) {
+          got.author = m["matched"];
+          got.canned_query ~= "&au=" ~ m["matched"];
+        }
+        if (auto m = got.search_text_area.matchFirst(rgx.title)) {
+          got.title = m["matched"];
+          got.canned_query ~= "&ti=" ~ m["matched"];
+        }
+        if (auto m = got.search_text_area.matchFirst(rgx.uid)) {
+          got.uid = m["matched"];
+          got.canned_query ~= "&uid=" ~ m["matched"];
+        }
+        if (auto m = got.search_text_area.matchFirst(rgx.fn)) {
+          got.fn = m["matched"];
+          got.canned_query ~= "&fn=" ~ m["matched"];
+        } else if ("fn" in cgi.post) {
+          got.search_text_area ~= "\nfn: " ~ cgi.post["fn"] ~ "\n";
+        }
+        if (auto m = got.search_text_area.matchFirst(rgx.keywords)) {
+          got.keywords = m["matched"];
+          got.canned_query ~= "&kw=" ~ m["matched"];
+        }
+        if (auto m = got.search_text_area.matchFirst(rgx.topic_register)) {
+          got.topic_register = m["matched"];
+          got.canned_query ~= "&tr=" ~ m["matched"];
+        }
+        if (auto m = got.search_text_area.matchFirst(rgx.subject)) {
+          got.subject = m["matched"];
+          got.canned_query ~= "&su=" ~ m["matched"];
+        }
+        if (auto m = got.search_text_area.matchFirst(rgx.description)) {
+          got.description = m["matched"];
+          got.canned_query ~= "&de=" ~ m["matched"];
+        }
+        if (auto m = got.search_text_area.matchFirst(rgx.publisher)) {
+          got.publisher = m["matched"];
+          got.canned_query ~= "&pb=" ~ m["matched"];
+        }
+        if (auto m = got.search_text_area.matchFirst(rgx.editor)) {
+          got.editor = m["matched"];
+          got.canned_query ~= "&ed=" ~ m["matched"];
+        }
+        if (auto m = got.search_text_area.matchFirst(rgx.contributor)) {
+          got.contributor = m["matched"];
+          got.canned_query ~= "&ct=" ~ m["matched"];
+        }
+        if (auto m = got.search_text_area.matchFirst(rgx.date)) {
+          got.date = m["matched"];
+          got.canned_query ~= "&dt=" ~ m["matched"];
+        }
+        // if (auto m = got.search_text_area.matchFirst(rgx.results_type)) {
+        //   got.results_type = m["matched"];
+        //   got.canned_query ~= "&rt=" ~ m["matched"];
+        // }
+        if (auto m = got.search_text_area.matchFirst(rgx.format)) {
+          got.format = m["matched"];
+          got.canned_query ~= "&fmt=" ~ m["matched"];
+        }
+        if (auto m = got.search_text_area.matchFirst(rgx.source)) {
+          got.source = m["matched"];
+          got.canned_query ~= "&src=" ~ m["matched"];
+        }
+        if (auto m = got.search_text_area.matchFirst(rgx.language)) {
+          got.language = m["matched"];
+          got.canned_query ~= "&lng=" ~ m["matched"];
+        }
+        if (auto m = got.search_text_area.matchFirst(rgx.relation)) {
+          got.relation = m["matched"];
+          got.canned_query ~= "&rl=" ~ m["matched"];
+        }
+        if (auto m = got.search_text_area.matchFirst(rgx.coverage)) {
+          got.coverage = m["matched"];
+          got.canned_query ~= "&cv=" ~ m["matched"];
+        }
+        if (auto m = got.search_text_area.matchFirst(rgx.rights)) {
+          got.rights = m["matched"];
+          got.canned_query ~= "&rgt=" ~ m["matched"];
+        }
+        if (auto m = got.search_text_area.matchFirst(rgx.comment)) {
+          got.comment = m["matched"];
+          got.canned_query ~= "&cmt=" ~ m["matched"];
+        }
+        // if (auto m = search_text_area.matchFirst(rgx.abstract)) {
+        //   got.abstract = m["matched"];
+        // }
+        if (auto m = got.search_text_area.matchFirst(rgx.src_filename_base)) {
+          got.src_filename_base = m["matched"];
+          got.canned_query ~= "&bfn=" ~ m["matched"];
+        }
+      }
+      if ("fn" in cgi.post) {
+        got.fn =  cgi.post["fn"];
+        got.canned_query ~= "&fn=" ~ cgi.post["fn"];
+      }
+      if ("rt" in cgi.post) {
+        got.results_type =  cgi.post["rt"];
+        got.canned_query ~= "&rt=" ~ cgi.post["rt"];
+      }
+      if ("sts" in cgi.post) {
+        got.stats =  cgi.post["sts"];
+        got.canned_query ~= "&sts=" ~ cgi.post["sts"];
+      }
+      if ("ec" in cgi.post) {
+        got.echo =  cgi.post["ec"];
+        got.canned_query ~= "&ec=" ~ cgi.post["ec"];
+      }
+      if ("url" in cgi.post) {
+        got.url =  cgi.post["url"];
+        got.canned_query ~= "&url=" ~ cgi.post["url"];
+      }
+      if ("se" in cgi.post) {
+        got.searched =  cgi.post["se"];
+        got.canned_query ~= "&se=" ~ cgi.post["se"];
+      }
+      if ("sql" in cgi.post) {
+        got.sql =  cgi.post["sql"];
+        got.canned_query ~= "&sql=" ~ cgi.post["sql"];
+      }
+      if ("sml" in cgi.post) {
+        got.sql_match_limit =  cgi.post["sml"];
+        got.canned_query ~= "&sml=" ~ cgi.post["sml"];
+      }
+      if ("smo" in cgi.post) {
+        got.sql_match_offset = "0";   // cgi.post["smo"];
+        got.canned_query ~= "&smo=0"; //  ~ cgi.post["smo"];
+      }
+      got.canned_query = got.canned_query.strip.split(" ").join("%20");
+      conf.query_string = got.canned_query;
+      // cgi.write("f.canned_query: " ~ got.canned_query ~ "<br>");
+    } else if (environment.get("REQUEST_METHOD", "POST") == "GET") {
+      got.canned_query = environment.get("QUERY_STRING", "");
+      // cgi.write("f.canned_query: " ~ got.canned_query ~ "<br>");
+      got.search_text_area = "";
+      if ("sf" in canned_query && !(canned_query["sf"]).empty) {
+        got.text = canned_query["sf"].split("%20").join(" ");
+        got.search_text_area ~= "text: " ~ got.text ~ "\n";
+      }
+      if ("au" in canned_query && !(canned_query["au"]).empty) {
+        got.author = canned_query["au"].split("%20").join(" ");
+        got.search_text_area ~= "author: " ~ got.author ~ "\n";
+      }
+      if ("ti" in canned_query && !(canned_query["ti"]).empty) {
+        got.title = canned_query["ti"].split("%20").join(" ");
+        got.search_text_area ~= "title: " ~ got.title ~ "\n";
+      }
+      if ("uid" in canned_query && !(canned_query["uid"]).empty) {
+        got.uid = canned_query["uid"].split("%20").join(" ");
+        got.search_text_area ~= "uid: " ~ got.uid ~ "\n";
+      }
+      if ("fn" in canned_query && !(canned_query["fn"]).empty) {
+        got.fn = canned_query["fn"].split("%20").join(" ");
+        got.search_text_area ~= "fn: " ~ got.fn ~ "\n";
+      }
+      if ("kw" in canned_query && !(canned_query["kw"]).empty) {
+        got.keywords = canned_query["kw"].split("%20").join(" ");
+        got.search_text_area ~= "keywords: " ~ got.keywords ~ "\n";
+      }
+      if ("tr" in canned_query && !(canned_query["tr"]).empty) {
+        got.topic_register = canned_query["tr"].split("%20").join(" ");
+        got.search_text_area ~= "topic_register: " ~ got.topic_register ~ "\n";
+      }
+      if ("su" in canned_query && !(canned_query["su"]).empty) {
+        got.subject = canned_query["su"].split("%20").join(" ");
+        got.search_text_area ~= "subject: " ~ got.subject ~ "\n";
+      }
+      if ("de" in canned_query && !(canned_query["de"]).empty) {
+        got.description = canned_query["de"].split("%20").join(" ");
+        got.search_text_area ~= "description: " ~ got.description ~ "\n";
+      }
+      if ("pb" in canned_query && !(canned_query["pb"]).empty) {
+        got.publisher = canned_query["pb"].split("%20").join(" ");
+        got.search_text_area ~= "publisher: " ~ got.publisher ~ "\n";
+      }
+      if ("ed" in canned_query && !(canned_query["ed"]).empty) {
+        got.editor = canned_query["ed"].split("%20").join(" ");
+        got.search_text_area ~= "editor: " ~ got.editor ~ "\n";
+      }
+      if ("ct" in canned_query && !(canned_query["ct"]).empty) {
+        got.contributor = canned_query["ct"].split("%20").join(" ");
+        got.search_text_area ~= "contributor: " ~ got.contributor ~ "\n";
+      }
+      if ("dt" in canned_query && !(canned_query["dt"]).empty) {
+        got.date = canned_query["dt"].split("%20").join(" ");
+        got.search_text_area ~= "date: " ~ got.date ~ "\n";
+      }
+      if ("rt" in canned_query && !(canned_query["rt"]).empty) {
+        got.results_type = canned_query["rt"].split("%20").join(" ");
+        // got.search_text_area ~= "results_type: " ~ got.results_type ~ "\n";
+      }
+      if ("fmt" in canned_query && !(canned_query["fmt"]).empty) {
+        got.format = canned_query["fmt"].split("%20").join(" ");
+        got.search_text_area ~= "format: " ~ got.format ~ "\n";
+      }
+      if ("src" in canned_query && !(canned_query["src"]).empty) {
+        got.source = canned_query["src"].split("%20").join(" ");
+        got.search_text_area ~= "source: " ~ got.source ~ "\n";
+      }
+      if ("lng" in canned_query && !(canned_query["lng"]).empty) {
+        got.language = canned_query["lng"].split("%20").join(" ");
+        got.search_text_area ~= "language: " ~ got.language ~ "\n";
+      }
+      if ("rl" in canned_query && !(canned_query["rl"]).empty) {
+        got.relation = canned_query["rl"].split("%20").join(" ");
+        got.search_text_area ~= "relation: " ~ got.relation ~ "\n";
+      }
+      if ("cv" in canned_query && !(canned_query["cv"]).empty) {
+        got.coverage = canned_query["cv"].split("%20").join(" ");
+        got.search_text_area ~= "coverage: " ~ got.coverage ~ "\n";
+      }
+      if ("rgt" in canned_query && !(canned_query["rgt"]).empty) {
+        got.rights = canned_query["rgt"].split("%20").join(" ");
+        got.search_text_area ~= "rights: " ~ got.rights ~ "\n";
+      }
+      if ("cmt" in canned_query && !(canned_query["cmt"]).empty) {
+        got.comment = canned_query["cmt"].split("%20").join(" ");
+        got.search_text_area ~= "comment: " ~ got.comment ~ "\n";
+      }
+      // if ("abstract" in canned_query && !(canned_query["abstract"]).empty) {
+      //   got.abstract = canned_query["abstract"];
+      // }
+      if ("bfn" in canned_query && !(canned_query["bfn"]).empty) { // search_field
+        got.src_filename_base = canned_query["bfn"].split("%20").join(" ");
+        got.search_text_area ~= "src_filename_base: " ~ got.src_filename_base ~ "\n";
+      }
+      if ("sml" in canned_query && !(canned_query["sml"]).empty) {
+        got.sql_match_limit = canned_query["sml"].split("%20").join(" ");
+        // got.search_text_area ~= "sql_match_limit: " ~ got.sql_match_limit ~ "\n";
+      }
+      // cgi.write("f.search_text_area: " ~ got.search_text_area ~ "<br>");
+    }
+    return got;
+  }
+  auto tf = text_fields; //
+  struct SQL_select {
+    string the_body         = "";
+    string the_range        = "";
+  }
+  auto sql_select = SQL_select();
+  string canned_url () {
+    string _url = "";
+    if (environment.get("REQUEST_METHOD", "POST") == "POST") {
+      _url = conf.http_request_type ~ "://" ~ conf.http_host ~ conf.cgi_script ~ "?" ~ tf.canned_query;
+    } else if (environment.get("REQUEST_METHOD", "POST") == "GET") {
+      _url = conf.http_request_type ~ "://" ~ conf.http_host ~ conf.cgi_script ~ "?" ~ environment.get("QUERY_STRING", "");
+    }
+    return _url;
+  }
+  auto regex_canned_search () {
+    static struct RgxCS {
+      static track_offset       = ctRegex!(`(?P<offset_key>[&]smo=)(?P<offset_val>[0-9]+)`);
+      static results_type       = ctRegex!(`[&]rt=(?P<results_type>idx|txt)`);
+      static results_type_index = ctRegex!(`[&]rt=idx`);
+      static results_type_text  = ctRegex!(`[&]rt=txt`);
+      static fn                 = ctRegex!(`[&]fn=(?P<fn>[^&]+)`);
+    }
+    return RgxCS();
+  }
+  string show_matched_objects (string fn) {
+    auto rgx = regex_canned_search;
+    string _matched_objects_text = "";
+    string _url = canned_url;
+    string _url_new = "";
+    string _matches_show_text  = "&rt=txt";
+    string _matches_show_index = "&rt=idx";
+    string _fn = "&fn=" ~ fn;
+    _url_new = _url;
+    if (_url_new.match(rgx.results_type_index)) {
+      _url_new = _url_new.replace(rgx.results_type_index, _matches_show_text);
+    } else if (_url.match(rgx.results_type_text)) {
+      _url_new = _url_new.replace(rgx.results_type_text, _matches_show_index);
+    } else {
+      if (!(_url.match(rgx.results_type))) {
+        _url_new = _url ~ _matches_show_text;
+      }
+    }
+    if (!(_url_new.match(rgx.fn))) {
+      _url_new = _url_new ~ _fn;
+    }
+    _matched_objects_text =
+      "<font size=\"2\" color=\"#666666\">"
+      ~ "<a href=\""
+      ~ _url_new
+      ~ "\">"
+      ~ "※"
+      ~ "</a></font>";
+    return _matched_objects_text;
+  }
+  string base                  ; // = "";
+  string tip                   ; // = "";
+  string search_note           ; // = "";
+  uint   sql_match_offset_count   = 0;
+  string previous_next () {
+    auto rgx = regex_canned_search;
+    string _previous_next = "";
+    int    _current_offset_value = 0;
+    string _set_offset_next = "";
+    string _set_offset_previous = "";
+    string _url = canned_url;
+    string _url_previous = "";
+    string _url_next = "";
+    string arrow_previous = "";
+    string arrow_next = "";
+    if (auto m = _url.matchFirst(rgx.track_offset)) {
+      _current_offset_value = m.captures["offset_val"].to!int;
+      _set_offset_next = m.captures["offset_key"] ~ ((m.captures["offset_val"]).to!int + cv.sql_match_limit.to!int).to!string;
+      _url_next = _url.replace(rgx.track_offset, _set_offset_next);
+      if (_current_offset_value < cv.sql_match_limit.to!int) {
+        _url_previous = "";
+      } else {
+        _url_previous = "";
+        _set_offset_previous = m.captures["offset_key"] ~ ((m.captures["offset_val"]).to!int - cv.sql_match_limit.to!int).to!string;
+        _url_previous = _url.replace(rgx.track_offset, _set_offset_previous);
+      }
+    } else {// _current_offset_value = 0;
+      _url_next = _url ~= "&smo=" ~ cv.sql_match_limit.to!string;
+    }
+    if (_url_previous.empty) {
+      arrow_previous = "";
+    } else {
+      arrow_previous =
+        "<font size=\"2\" color=\"#666666\">"
+        ~ "<a href=\""
+        ~ _url_previous
+        ~ "\">"
+        ~ "&lt;&lt prev"
+        ~ "</a> || </font>";
+    }
+    arrow_next =
+      "<font size=\"2\" color=\"#666666\">"
+      ~ "<a href=\""
+      ~ _url_next
+      ~ "\">"
+      ~ "next &gt;&gt"
+      ~ "</a></font>";
+    _previous_next = "<hr>" ~ arrow_previous ~ arrow_next;
+    return _previous_next;
+  }
+  {
+    header = format(q"┃
+<!DOCTYPE html>
+<html>
+<head>
+  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+  <title>
+  ≅ SiSU spine search form
+  </title>
+  <meta name="sourcefile" content="SiSU.sst">
+  <link rel="generator" href="sisudoc.org">
+  <link rel="shortcut icon" href="https://%s/image_sys/spine.ico">
+  <style media = "all">
+   *{
+    padding                  : 0px;
+    margin                   : 2px;
+  }
+  body {
+    height                   : 100vh;
+    background-color         : #FFFFFF;
+  }
+  body {
+    color                    : #000000;
+    background               : #FFFFFF;
+    background-color         : #FFFFFF;
+  }
+  a:link {
+    color                    : #003399;
+    text-decoration          : none;
+  }
+  a:visited {
+    color                    : #003399;
+    text-decoration          : none;
+  }
+  a:hover {
+    color                    : #000000;
+    background-color         : #F9F9AA;
+  }
+  a.lnkocn:link {
+    color                    : #777777;
+    text-decoration          : none;
+  }
+  a.lnkocn:visited {
+    color                    : #32CD32;
+    text-decoration          : none;
+  }
+  a.lnkocn:hover {
+    color                    : #777777;
+    font-size                : 15px;
+  }
+  a:hover img {
+    background-color         : #FFFFFF;
+  }
+  a:active {
+    color                    : #003399;
+    text-decoration          : underline;
+  }
+  .flex-container {
+    display                  : flex;
+  }
+  div.publication {
+    margin-top               : 2px;
+    margin-bottom            : 4px;
+    margin-left              : 0%%;
+    margin-right             : 0%%;
+  }
+  div.textview_ocn {
+    margin-left              : 0%%;
+    margin-right             : 1%%;
+  }
+  div.textview_found {
+    margin-left              : 1%%;
+    margin-right             : 1%%;
+  }
+  textarea {
+    color                    : #000000;
+    background-color         : #FFFFFF;
+  }
+  span.match {
+    color                    : #000000;
+    background-color         : #FFFF48;
+  }
+  p.norm { }
+  p.center { text-align      : center; }
+  p.i1 { padding-left        : 1em; }
+  p.i2 { padding-left        : 2em; }
+  p.i3 { padding-left        : 3em; }
+  p.i4 { padding-left        : 4em; }
+  p.i5 { padding-left        : 5em; }
+  p.i6 { padding-left        : 6em; }
+  p.i7 { padding-left        : 7em; }
+  p.i8 { padding-left        : 8em; }
+  p.i9 { padding-left        : 9em; }
+  /* hanging indent */
+  p[indent="h0i0"] {
+    padding-left             : 0em;
+    text-indent              : 0em;
+  }
+  p.publication {
+    font-size                : 100%%;
+    margin-left              : 0em;
+    margin-top               : 0px;
+    margin-bottom            : 0px;
+    margin-right             : 6px;
+    text-align               : left;
+  }
+  p.ocn_is {
+    font-size                : 100%%;
+    display                  : inline-block;
+  }
+  p.matched_ocn {
+    font-size                : 90%%;
+    margin-left              : 2em;
+    margin-top               : 0px;
+    margin-bottom            : 0px;
+    margin-right             : 6px;
+    text-align               : left;
+  }
+  p[indent="h0i1"] {
+    padding-left             : 1em;
+    text-indent              : -1em;
+  }
+  p[indent="h0i2"] {
+    padding-left             : 2em;
+    text-indent              : -2em;
+  }
+  p[indent="h0i3"] {
+    padding-left             : 3em;
+    text-indent              : -3em;
+  }
+  p[indent="h0i4"] {
+    padding-left             : 4em;
+    text-indent              : -4em;
+  }
+  p[indent="h0i5"] {
+    padding-left             : 5em;
+    text-indent              : -5em;
+  }
+  p[indent="h0i6"] {
+    padding-left             : 6em;
+    text-indent              : -6em;
+  }
+  p[indent="h0i7"] {
+    padding-left             : 7em;
+    text-indent              : -7em;
+  }
+  p[indent="h0i8"] {
+    padding-left             : 8em;
+    text-indent              : -8em;
+  }
+  p[indent="h0i9"] {
+    padding-left             : 9em;
+    text-indent              : -9em;
+  }
+  p[indent="h1i0"] {
+    padding-left             : 0em;
+    text-indent              : 1em;
+  }
+  p[indent="h1i1"] {
+    padding-left             : 1em;
+    text-indent              : 0em;
+  }
+  p[indent="h1i2"] {
+    padding-left             : 2em;
+    text-indent              : -1em;
+  }
+  p[indent="h1i3"] {
+    padding-left             : 3em;
+    text-indent              : -2em;
+  }
+  p[indent="h1i4"] {
+    padding-left             : 4em;
+    text-indent              : -3em;
+  }
+  p[indent="h1i5"] {
+    padding-left             : 5em;
+    text-indent              : -4em;
+  }
+  p[indent="h1i6"] {
+    padding-left             : 6em;
+    text-indent              : -5em;
+  }
+  p[indent="h1i7"] {
+    padding-left             : 7em;
+    text-indent              : -6em;
+  }
+  p[indent="h1i8"] {
+    padding-left             : 8em;
+    text-indent              : -7em;
+  }
+  p[indent="h1i9"] {
+    padding-left             : 9em;
+    text-indent              : -8em;
+  }
+  p[indent="h2i0"] {
+    padding-left             : 0em;
+    text-indent              : 2em;
+  }
+  p[indent="h2i1"] {
+    padding-left             : 1em;
+    text-indent              : 1em;
+  }
+  p[indent="h2i2"] {
+    padding-left             : 2em;
+    text-indent              : 0em;
+  }
+  p[indent="h2i3"] {
+    padding-left             : 3em;
+    text-indent              : -1em;
+  }
+  p[indent="h2i4"] {
+    padding-left             : 4em;
+    text-indent              : -2em;
+  }
+  p[indent="h2i5"] {
+    padding-left             : 5em;
+    text-indent              : -3em;
+  }
+  p[indent="h2i6"] {
+    padding-left             : 6em;
+    text-indent              : -4em;
+  }
+  p[indent="h2i7"] {
+    padding-left             : 7em;
+    text-indent              : -5em;
+  }
+  p[indent="h2i8"] {
+    padding-left             : 8em;
+    text-indent              : -6em;
+  }
+  p[indent="h2i9"] {
+    padding-left             : 9em;
+    text-indent              : -7em;
+  }
+  p[indent="h3i0"] {
+    padding-left             : 0em;
+    text-indent              : 3em;
+  }
+  p[indent="h3i1"] {
+    padding-left             : 1em;
+    text-indent              : 2em;
+  }
+  p[indent="h3i2"] {
+    padding-left             : 2em;
+    text-indent              : 1em;
+  }
+  p[indent="h3i3"] {
+    padding-left             : 3em;
+    text-indent              : 0em;
+  }
+  p[indent="h3i4"] {
+    padding-left             : 4em;
+    text-indent              : -1em;
+  }
+  p[indent="h3i5"] {
+    padding-left             : 5em;
+    text-indent              : -2em;
+  }
+  p[indent="h3i6"] {
+    padding-left             : 6em;
+    text-indent              : -3em;
+  }
+  p[indent="h3i7"] {
+    padding-left             : 7em;
+    text-indent              : -4em;
+  }
+  p[indent="h3i8"] {
+    padding-left             : 8em;
+    text-indent              : -5em;
+  }
+  p[indent="h3i9"] {
+    padding-left             : 9em;
+    text-indent              : -6em;
+  }
+  p[indent="h4i0"] {
+    padding-left             : 0em;
+    text-indent              : 4em;
+  }
+  p[indent="h4i1"] {
+    padding-left             : 1em;
+    text-indent              : 3em;
+  }
+  p[indent="h4i2"] {
+    padding-left             : 2em;
+    text-indent              : 2em;
+  }
+  p[indent="h4i3"] {
+    padding-left             : 3em;
+    text-indent              : 1em;
+  }
+  p[indent="h4i4"] {
+    padding-left             : 4em;
+    text-indent              : 0em;
+  }
+  p[indent="h4i5"] {
+    padding-left             : 5em;
+    text-indent              : -1em;
+  }
+  p[indent="h4i6"] {
+    padding-left             : 6em;
+    text-indent              : -2em;
+  }
+  p[indent="h4i7"] {
+    padding-left             : 7em;
+    text-indent              : -3em;
+  }
+  p[indent="h4i8"] {
+    padding-left             : 8em;
+    text-indent              : -4em;
+  }
+  p[indent="h4i9"] {
+    padding-left             : 9em;
+    text-indent              : -5em;
+  }
+  p[indent="h5i0"] {
+    padding-left             : 0em;
+    text-indent              : 5em;
+  }
+  p[indent="h5i1"] {
+    padding-left             : 1em;
+    text-indent              : 4em;
+  }
+  p[indent="h5i2"] {
+    padding-left             : 2em;
+    text-indent              : 3em;
+  }
+  p[indent="h5i3"] {
+    padding-left             : 3em;
+    text-indent              : 2em;
+  }
+  p[indent="h5i4"] {
+    padding-left             : 4em;
+    text-indent              : 1em;
+  }
+  p[indent="h5i5"] {
+    padding-left             : 5em;
+    text-indent              : 0em;
+  }
+  p[indent="h5i6"] {
+    padding-left             : 6em;
+    text-indent              : -1em;
+  }
+  p[indent="h5i7"] {
+    padding-left             : 7em;
+    text-indent              : -2em;
+  }
+  p[indent="h5i8"] {
+    padding-left             : 8em;
+    text-indent              : -3em;
+  }
+  p[indent="h5i9"] {
+    padding-left             : 9em;
+    text-indent              : -4em;
+  }
+  p[indent="h6i0"] {
+    padding-left             : 0em;
+    text-indent              : 6em;
+  }
+  p[indent="h6i1"] {
+    padding-left             : 1em;
+    text-indent              : 5em;
+  }
+  p[indent="h6i2"] {
+    padding-left             : 2em;
+    text-indent              : 4em;
+  }
+  p[indent="h6i3"] {
+    padding-left             : 3em;
+    text-indent              : 3em;
+  }
+  p[indent="h6i4"] {
+    padding-left             : 4em;
+    text-indent              : 2em;
+  }
+  p[indent="h6i5"] {
+    padding-left             : 5em;
+    text-indent              : 1em;
+  }
+  p[indent="h6i6"] {
+    padding-left             : 6em;
+    text-indent              : 0em;
+  }
+  p[indent="h6i7"] {
+    padding-left             : 7em;
+    text-indent              : -1em;
+  }
+  p[indent="h6i8"] {
+    padding-left             : 8em;
+    text-indent              : -2em;
+  }
+  p[indent="h6i9"] {
+    padding-left             : 9em;
+    text-indent              : -3em;
+  }
+  p[indent="h7i0"] {
+    padding-left             : 0em;
+    text-indent              : 7em;
+  }
+  p[indent="h7i1"] {
+    padding-left             : 1em;
+    text-indent              : 6em;
+  }
+  p[indent="h7i2"] {
+    padding-left             : 2em;
+    text-indent              : 5em;
+  }
+  p[indent="h7i3"] {
+    padding-left             : 3em;
+    text-indent              : 4em;
+  }
+  p[indent="h7i4"] {
+    padding-left             : 4em;
+    text-indent              : 3em;
+  }
+  p[indent="h7i5"] {
+    padding-left             : 5em;
+    text-indent              : 2em;
+  }
+  p[indent="h7i6"] {
+    padding-left             : 6em;
+    text-indent              : 1em;
+  }
+  p[indent="h7i7"] {
+    padding-left             : 7em;
+    text-indent              : 0em;
+  }
+  p[indent="h7i8"] {
+    padding-left             : 8em;
+    text-indent              : -1em;
+  }
+  p[indent="h7i9"] {
+    padding-left             : 9em;
+    text-indent              : -2em;
+  }
+  p[indent="h8i0"] {
+    padding-left             : 0em;
+    text-indent              : 8em;
+  }
+  p[indent="h8i1"] {
+    padding-left             : 1em;
+    text-indent              : 7em;
+  }
+  p[indent="h8i2"] {
+    padding-left             : 2em;
+    text-indent              : 6em;
+  }
+  p[indent="h8i3"] {
+    padding-left             : 3em;
+    text-indent              : 5em;
+  }
+  p[indent="h8i4"] {
+    padding-left             : 4em;
+    text-indent              : 4em;
+  }
+  p[indent="h8i5"] {
+    padding-left             : 5em;
+    text-indent              : 3em;
+  }
+  p[indent="h8i6"] {
+    padding-left             : 6em;
+    text-indent              : 2em;
+  }
+  p[indent="h8i7"] {
+    padding-left             : 7em;
+    text-indent              : 1em;
+  }
+  p[indent="h8i8"] {
+    padding-left             : 8em;
+    text-indent              : 0em;
+  }
+  p[indent="h8i9"] {
+    padding-left             : 9em;
+    text-indent              : -1em;
+  }
+  p[indent="h9i0"] {
+    padding-left             : 0em;
+    text-indent              : 9em;
+  }
+  p[indent="h9i1"] {
+    padding-left             : 1em;
+    text-indent              : 8em;
+  }
+  p[indent="h9i2"] {
+    padding-left             : 2em;
+    text-indent              : 7em;
+  }
+  p[indent="h9i3"] {
+    padding-left             : 3em;
+    text-indent              : 6em;
+  }
+  p[indent="h9i4"] {
+    padding-left             : 4em;
+    text-indent              : 5em;
+  }
+  p[indent="h9i5"] {
+    padding-left             : 5em;
+    text-indent              : 4em;
+  }
+  p[indent="h9i6"] {
+    padding-left             : 6em;
+    text-indent              : 3em;
+  }
+  p[indent="h9i7"] {
+    padding-left             : 7em;
+    text-indent              : 2em;
+  }
+  p[indent="h9i8"] {
+    padding-left             : 8em;
+    text-indent              : 1em;
+  }
+  p[indent="h9i9"] {
+    padding-left             : 9em;
+    text-indent              : 0em;
+  }
+  p.spaced { white-space     : pre; }
+  p.block {
+    white-space              : pre;
+  }
+  p.group { }
+  p.alt { }
+  p.verse {
+    white-space              : pre;
+    margin-bottom            : 6px;
+  }
+  p.caption {
+    text-align               : left;
+    font-size                : 80%%;
+    display                  : inline;
+  }
+  p.endnote {
+    font-size                : 96%%;
+    line-height              : 120%%;
+    text-align               : left;
+    margin-right             : 15mm;
+    padding-left             : 1em;
+    text-indent              : -1em;
+  }
+  p.center {
+    text-align               : center;
+  }
+  p.bold {
+    font-weight              : bold;
+  }
+  p.bold_left {
+    font-weight              : bold;
+    text-align               : left;
+  }
+  p.centerbold {
+    text-align               : center;
+    font-weight              : bold;
+  }
+  p.em {
+    font-weight              : bold;
+    font-style               : normal;
+    background               : #FFF3B6;
+  }
+  p.small {
+    font-size                : 80%%;
+    margin-top               : 0px;
+    margin-bottom            : 0px;
+    margin-right             : 6px;
+    text-align               : left;
+  }
+  .tiny, .tiny_left, .tiny_right, .tiny_center {
+    font-size                : 10px;
+    margin-top               : 0px;
+    margin-bottom            : 0px;
+    color                    : #EEEEEE;
+    margin-right             : 6px;
+    text-align               : left;
+  }
+  p.tiny { }
+  p.tiny_left {
+    margin-left              : 0px;
+    margin-right             : 0px;
+    text-align               : left;
+  }
+  p.tiny_right {
+    margin-right             : 1em;
+    text-align               : right;
+  }
+  p.tiny_center {
+    margin-left              : 0px;
+    margin-right             : 0px;
+    text-align               : center;
+  }
+  p.book_index_lev1 {
+    line-height              : 100%%;
+    margin-top               : 4px;
+    margin-bottom            : 1px;
+  }
+  p.book_index_lev2 {
+    line-height              : 100%%;
+    text-align               : left;
+    margin-left              : 3em;
+    margin-top               : 1px;
+    margin-bottom            : 3px;
+  }
+  tt {
+    font-family              : inconsolata, "liberation mono", "bitstream vera mono", "dejavu mono", monaco, consolas, "andale mono", "courier new", "courier 10 pitch", courier, monospace;
+    background-color         : #555555;
+    color                    : #DDDDDD;
+  }
+  pre {
+    width                    : auto;
+    display                  : block;
+    clear                    : both;
+    color                    : #555555;
+  }
+  pre.codeline {
+    display                  : table;
+    clear                    : both;
+    table-layout             : fixed;
+    margin-left              : 5%%;
+    margin-right             : 5%%;
+    width                    : 90%%;
+    white-space              : pre-wrap;
+    border-style             : none;
+    border-radius            : 5px 5px 5px 5px;
+    box-shadow               : 0 2px 5px #AAAAAA inset;
+    margin-bottom            : 1em;
+    padding                  : 0.5em 1em;
+    page-break-inside        : avoid;
+    word-wrap                : break-word;
+    font-family              : inconsolata, "liberation mono", "bitstream vera mono", "dejavu mono", monaco, consolas, "andale mono", "courier new", "courier 10 pitch", courier, monospace;
+    white-space              : pre;
+    white-space              : pre-wrap;
+    white-space              : -moz-pre-wrap;
+    white-space              : -o-pre-wrap;
+    background-color         : #555555;
+    color                    : #DDDDDD;
+    font-size                : 95%%;
+    line-height              : 100%%;
+  }
+  pre.codeline::before {
+    counter-reset            : linenum;
+  }
+  pre.codeline span.tr {
+    display                  : table-row;
+    counter-increment        : linenum;
+  }
+  pre.codeline span.th {
+    display                  : table-cell;
+    user-select              : none;
+    -moz-user-select         : none;
+    -webkit-user-select      : none;
+    padding                  : 0.5em 0.5em;
+  }
+  pre.codeline span.th::before {
+    content                  : counter(linenum) ".";
+    color                    : #999999;
+    text-align               : right;
+    display                  : block;
+  }
+  pre.codeline span.th {
+    width                    : 4em;
+  }
+  pre.codeline code {
+    display                  : table-cell;
+  }
+  p.code {
+    border-style             : none;
+  }
+  note { white-space         : pre; }
+  em {
+    font-weight              : bold;
+    font-style               : italic;
+  }
+  p.left,th.left,td.left {
+    text-align               : left;
+  }
+  p.small_left,th.small_left,td.small_left {
+    text-align               : left;
+    font-size                : 80%%;
+  }
+  p.right,th.right,td.right {
+    text-align               : right;
+  }
+  ul, li {
+    list-style-type          : none;
+    list-style               : none;
+    padding-left             : 20px;
+    font-weight              : normal;
+    line-height              : 150%%;
+    text-align               : left;
+    text-indent              : 0mm;
+    margin-left              : 1em;
+    margin-right             : 2em;
+    margin-top               : 3px;
+    margin-bottom            : 3px;
+  }
+  li {
+    background               : (../image_sys/bullet_09.png) no-repeat 0px 6px;
+  }
+  ul { }
+  h0, h1, h2, h3, h4, h5, h6, h7 {
+    font-weight              : bold;
+    line-height              : 120%%;
+    text-align               : left;
+    margin-top               : 20px;
+    margin-bottom            : 10px;
+  }
+  h4.norm, h5.norm, h6.norm, h7.norm {
+    margin-top               : 10px;
+    margin-bottom            : 0px;
+  }
+  h0 { font-size             : 125%%; }
+  h1 { font-size             : 120%%; }
+  h2 { font-size             : 115%%; }
+  h3 { font-size             : 110%%; }
+  h4 { font-size             : 105%%; }
+  h5 { font-size             : 100%%; }
+  h6 { font-size             : 100%%; }
+  h7 { font-size             : 100%%; }
+  h0, h1, h2, h3, h4, h5, h6, h7 {
+    text-shadow              : .2em .2em .3em #999999;
+  }
+  h1.i { margin-left         : 2em; }
+  h2.i { margin-left         : 3em; }
+  h3.i { margin-left         : 4em; }
+  h4.i { margin-left         : 5em; }
+  h5.i { margin-left         : 6em; }
+  h6.i { margin-left         : 7em; }
+  h7.i { margin-left         : 8em; }
+  h8.i { margin-left         : 9em; }
+  h9.i { margin-left         : 10em; }
+  .toc {
+    font-weight              : normal;
+    margin-top               : 6px;
+    margin-bottom            : 6px;
+  }
+  h0.toc {
+    margin-left              : 1em;
+    font-size                : 120%%;
+    line-height              : 150%%;
+  }
+  h1.toc {
+    margin-left              : 1em;
+    font-size                : 115%%;
+    line-height              : 150%%;
+  }
+  h2.toc {
+    margin-left              : 2em;
+    font-size                : 110%%;
+    line-height              : 140%%;
+  }
+  h3.toc {
+    margin-left              : 3em;
+    font-size                : 105%%;
+    line-height              : 120%%;
+  }
+  h4.toc {
+    margin-left              : 4em;
+    font-size                : 100%%;
+    line-height              : 120%%;
+  }
+  h5.toc {
+    margin-left              : 5em;
+    font-size                : 95%%;
+    line-height              : 110%%;
+  }
+  h6.toc {
+    margin-left              : 6em;
+    font-size                : 90%%;
+    line-height              : 110%%;
+  }
+  h7.toc {
+    margin-left              : 7em;
+    font-size                : 85%%;
+    line-height              : 100%%;
+  }
+  .subtoc {
+    margin-right             : 34%%;
+    font-weight              : normal;
+  }
+  h5.subtoc {
+    margin-left              : 2em;
+    font-size                : 80%%;
+    margin-top               : 2px;
+    margin-bottom            : 2px;
+  }
+  h6.subtoc {
+    margin-left              : 3em;
+    font-size                : 75%%;
+    margin-top               : 0px;
+    margin-bottom            : 0px;
+  }
+  h7.subtoc {
+    margin-left              : 4em;
+    font-size                : 70%%;
+    margin-top               : 0px;
+    margin-bottom            : 0px;
+  }
+  hr {
+    display                  : block;
+    height                   : 1px;
+    width                    : 100%%;
+    border                   : 0;
+    border-top               : 1px solid #AAAAAA;
+    border-color             : #AAAAAA
+    background-color         : #AAAAAA
+    margin-left              : 0%%;
+    margin-right             : 0em;
+    margin-top               : 0.5em;
+    margin-bottom            : 0.5em;
+    padding                  : 0;
+  }
+</style>
+</head>
+<body lang="en" xml:lang="en">
+┃",
+    conf.http_host,
+   );
+  }
+  {
+    table = format(q"┃
+ <table summary="band" border="0" cellpadding="2" cellspacing="0">
+ <tr><td width="20%%">
+  <table summary="home button / home information" border="0" cellpadding="2" cellspacing="0">
+  <tr><td align="left">
+   ≅ SiSU spine search form
+  </td></tr>
+  </table>
+ </td>
+ <td>
+ </td></tr>
+ </table>
+ ┃");
+  }
+  {
+    string post_value(string field_name, string type="box", string set="on") {
+      string val = "";
+      switch (type) {
+      case "field":
+        val = ((field_name in cgi.post && !(cgi.post[field_name]).empty)
+          ? cgi.post[field_name]
+          : (field_name in cgi.get)
+            ? cgi.get[field_name]
+            : "");
+        val = tf.search_text_area;
+        break;
+      case "box": // generic for checkbox or radio; checkbox set == "on" radio set == "name set"
+        val = ((field_name in cgi.post && !(cgi.post[field_name]).empty)
+          ? (cgi.post[field_name]  == set ? "checked" : "off")
+          : (field_name in cgi.get)
+            ? (cgi.get[field_name] == set ? "checked" : "off")
+            :                               "off");
+        break;
+      case "radio": // used generic bo
+        val = ((field_name in cgi.post && !(cgi.post[field_name]).empty)
+          ? (cgi.post[field_name]  == set ? "checked" : "off")
+          : (field_name in cgi.get)
+            ? (cgi.get[field_name] == set ? "checked" : "off")
+            :                               "checked");
+        break;
+      case "checkbox": // used generic bo
+        val = ((field_name in cgi.post && !(cgi.post[field_name]).empty)
+          ? (cgi.post[field_name]  == set ? "checked" : "off")
+          : (field_name in cgi.get)
+            ? (cgi.get[field_name] == set ? "checked" : "off")
+            :                               "checked");
+        break;
+      default:
+      }
+      return val;
+    }
+    string the_can(string fv) {
+      string show_the_can = post_value("url");
+      string _the_can = "";
+      if (show_the_can == "checked") {
+        tf = text_fields;
+        string method_get_url            = conf.http_request_type ~ "://" ~ conf.http_host ~ conf.cgi_script ~ "?" ~ environment.get("QUERY_STRING", "");
+        string method_post_url_construct = conf.http_request_type ~ "://" ~ conf.http_host ~ conf.cgi_script ~ "?" ~ tf.canned_query;
+        // assert(method_get_url == environment.get("HTTP_REFERER", conf.http_request_type ~ "://" ~ conf.http_host ~ conf.cgi_script ~ "?" ~ conf.query_string));
+        if (conf.request_method == "POST") {
+          _the_can =
+            "<font size=\"2\" color=\"#666666\">"
+            ~ "POST:&nbsp;"
+            ~ "<a href=\""
+            ~ method_post_url_construct
+            ~ "\">"
+            ~ method_post_url_construct
+            ~ "</a></font>"
+            ~ "<br>";
+        } else if (conf.request_method == "GET") {
+          _the_can =
+            "<font size=\"2\" color=\"#666666\">"
+            ~ "GET:&nbsp;&nbsp;"
+            ~ "<a href=\""
+            ~ method_get_url
+            ~ "\">"
+            ~ method_get_url
+            ~ "</a></font>";
+        }
+        conf.http_url = conf.http_request_type ~ "://" ~ conf.http_host ~ conf.cgi_script ~ tf.canned_query;
+      }
+      return _the_can;
+    }
+    string provide_tip() {
+      string searched_tip = post_value("se");
+      string tip = "";
+      if (searched_tip == "checked") {
+        string search_field = post_value("sf", "field");
+        tf = text_fields;
+        tip = format(q"┃
+<font size="2" color="#666666">
+<b>database:</b> <font size="2" color="#004000">%s</font>; <b>selected view:</b> <font size="2" color="#004000">index</font>
+<b>search string:</b> %s %s %s %s %s %s<br>
+%s %s %s %s %s %s
+</font>
+┃",
+          cv.db_selected,
+          (tf.text.empty   ? "" : "\"text:   <font size=\"2\" color=\"#004000\">" ~ tf.text   ~ "</font>; "),
+          (tf.title.empty  ? "" : "\"title:  <font size=\"2\" color=\"#004000\">" ~ tf.title  ~ "</font>; "),
+          (tf.author.empty ? "" : "\"author: <font size=\"2\" color=\"#004000\">" ~ tf.author ~ "</font>; "),
+          (tf.date.empty   ? "" : "\"date    <font size=\"2\" color=\"#004000\">" ~ tf.date   ~ "</font>; "),
+          (tf.uid.empty    ? "" : "\"uid:    <font size=\"2\" color=\"#004000\">" ~ tf.uid    ~ "</font>; "),
+          (tf.fn.empty     ? "" : "\"fn:     <font size=\"2\" color=\"#004000\">" ~ tf.fn     ~ "</font>; "),
+          (tf.text.empty   ? "" :  "text:    <font size=\"2\" color=\"#004000\">" ~ tf.text   ~ "</font><br>"),
+          (tf.title.empty  ? "" : "title:    <font size=\"2\" color=\"#004000\">" ~ tf.title  ~ "</font><br>"),
+          (tf.author.empty ? "" :  "author:  <font size=\"2\" color=\"#004000\">" ~ tf.author ~ "</font><br>"),
+          (tf.date.empty   ? "" :  "date:    <font size=\"2\" color=\"#004000\">" ~ tf.date   ~ "</font><br>"),
+          (tf.uid.empty    ? "" : "\"uid:    <font size=\"2\" color=\"#004000\">" ~ tf.uid    ~ "</font>; "),
+          (tf.fn.empty     ? "" : "\"fn:     <font size=\"2\" color=\"#004000\">" ~ tf.fn     ~ "</font>; "),
+        );
+      }
+      return tip;
+    }
+    form = format(q"┃
+<form action="%s" id="SubmitForm" method="post" accept-charset="UTF-8">
+  <table cellpadding="2">
+  <tr><td valign=\"top\">
+      <textarea id="find" name="sf" type="text" rows="6" cols="40" maxlength="256" wrap="virtual">%s</textarea>
+  </td>
+  <td valign=\"top\">
+    %s
+    %s
+    %s
+  </td></tr></table>
+  <td valign=\"top\"><tr><td>
+    <font size="2" color="#222222">
+    <input type="hidden" name="db" value="%s">
+    <input type="submit" value="SiSU search">
+    <input type="radio" name="rt" id="results_type_index" value="idx" %s> index
+    <input type="radio" name="rt" id="results_type_text" value="txt" %s> text / grep;
+    match limit:
+    <input type="radio" name="sml" id="sql_match_limit_1000" value="1000" %s> 1,000
+    <input type="radio" name="sml" id="sql_match_limit_2500" value="2500" %s> 2,500
+    <br>
+      <input type="checkbox" name="ec" %s> echo query
+      <input type="checkbox" name="url" %s> search url
+      <input type="checkbox" name="se" %s> searched
+      <input type="checkbox" name="sql" %s> sql statement
+      <input type="hidden" name="smo" value="0">
+    <br>
+    </font>
+  </td></tr>
+  </table>
+</form>
+┃",
+      _cfg.filename_cgi,
+      (post_value("ec") == "checked") ? post_value("sf", "field") : "",
+      provide_tip,
+      search_note,
+      the_can(post_value("sf", "field")),
+      cv.db_selected,
+      post_value("rt",  "box", "idx"),
+      post_value("rt",  "box", "txt"),
+      post_value("sml", "box", "1000"),
+      post_value("sml", "box", "2500"),
+      post_value("ec"),
+      post_value("url"),
+      post_value("se"),
+      post_value("sql"),
+    );
+    {
+      string set_value(string field_name, string default_val) {
+        string val;
+        if (field_name in cgi.post) {
+          val = cgi.post[field_name];
+        } else if (field_name in cgi.get) {
+          val = cgi.get[field_name];
+        } else { val = default_val; }
+        return val;
+      }
+      bool set_bool(string field_name) {
+        bool val;
+        if (field_name in cgi.post
+        && cgi.post[field_name] == "on") {
+          val = true;
+        } else if (field_name in cgi.get
+        && cgi.get[field_name] == "on") {
+          val = true;
+        } else { val = false; }
+        return val;
+      }
+      cv.db_selected      = set_value("selected_db", _cfg.filename_db); // selected_db_name == db (spine.search.db or whatever)
+      cv.sql_match_limit  = set_value("sml",         "1000");
+      cv.sql_match_offset = set_value("smo",         "0");
+      cv.search_text      = set_value("sf",          "");
+      cv.results_type     = set_value("rt",          "idx");
+      cv.checked_echo     = set_bool("ec");
+      cv.checked_stats    = set_bool("sts");
+      cv.checked_url      = set_bool("url");
+      cv.checked_searched = set_bool("se");
+      cv.checked_tip      = set_bool("tip");
+      cv.checked_sql      = set_bool("sql");
+      tf = text_fields;
+    }
+  }
+  {
+    cgi.write(header);
+    cgi.write(table);
+    cgi.write(form);
+    // cgi.write(previous_next);
+    { // debug environment
+      // foreach (k, d; environment.toAA) {
+      //   cgi.write(k ~ ": " ~ d ~ "<br>");
+      // }
+    }
+    { // debug cgi info
+      // cgi.write("db_selected: "         ~ cv.db_selected ~ "<br>\n");
+      // cgi.write("search_text: "         ~ cv.search_text ~ "<br>\n");
+      // cgi.write("sql_match_limit: "     ~ cv.sql_match_limit ~ ";\n");
+      // cgi.write("sql_match_offset: "    ~ cv.sql_match_offset ~ ";\n");
+      // cgi.write("results_type: "        ~ cv.results_type ~ "<br>\n");
+      // cgi.write("cv.checked_echo: "     ~ (cv.checked_echo ? "checked" : "off") ~ "; \n");
+      // cgi.write("cv.checked_stats: "    ~ (cv.checked_stats ? "checked" : "off") ~ "; \n");
+      // cgi.write("cv.checked_url: "      ~ (cv.checked_url ? "checked" : "off") ~ "; \n");
+      // cgi.write("cv.checked_searched: " ~ (cv.checked_searched ? "checked" : "off") ~ ";<br>\n");
+      // cgi.write("cv.checked_tip: "      ~ (cv.checked_tip ? "checked" : "off") ~ "; \n");
+      // cgi.write("cv.checked_sql: "      ~ (cv.checked_sql ? "checked" : "off") ~ "<br>\n");
+    }
+  }
+  auto db = Database(conf.db_path ~ cv.db_selected);
+  {
+    uint sql_match_offset_counter(T)(T cv) {
+      sql_match_offset_count += cv.sql_match_limit.to!uint;
+      return sql_match_offset_count;
+    }
+    void sql_search_query() {
+      string highlight_text_matched(string _txt, string search_field) {
+        string _mark_open   = "┤";
+        string _mark_close  = "├";
+        string _span_match = "<span class=\"match\">";
+        string _span_close  = "</span>";
+        string _sf_str      = search_field.strip.split("%20").join(" ").strip;
+        string[] _sf_arr    = _sf_str.split(regex(r"\s+AND\s+|\s+OR\s+"));
+        auto rgx_url        = regex(r"<a href=[^>]+?>");
+        foreach (_sf; _sf_arr) {
+          auto rgx_matched_text = regex(_sf, "i");
+          auto rgx_marked_pair  = regex(r"┤(?P<keep>" ~ _sf ~ ")├", "i");
+          if (auto m = _txt.matchFirst(rgx_url)) {
+            _txt = replaceAll!(m =>
+                _mark_open
+                ~  m.captures[0]
+                ~ _mark_close
+              )(_txt, rgx_matched_text);
+            _txt = replaceAll!(m =>
+                replaceAll!(u =>
+                  u["keep"]
+                )(m.hit, rgx_marked_pair)
+              )(_txt, rgx_url);
+            _txt = replaceAll!(m =>
+                _span_match
+                ~  m["keep"]
+                ~ _span_close
+              )(_txt, rgx_marked_pair);
+          } else {
+            _txt = replaceAll!(m =>
+                _span_match
+                ~  m.captures[0]
+                ~ _span_close
+              )(_txt, rgx_matched_text);
+          }
+        }
+        return _txt;
+      }
+      string select_field_like(string db_field, string search_field) {
+        string where_ = "";
+        if (!(search_field.empty)) {
+          string _sf = search_field.strip.split("%20").join(" ");
+          if (_sf.match(r" OR ")) {
+            _sf = _sf.split(" OR ").join("%' OR " ~ db_field ~ " LIKE '%");
+          }
+          if (_sf.match(r" AND ")) {
+            _sf = _sf.split(" AND ").join("%' AND " ~ db_field ~ " LIKE '%");
+          }
+          _sf = "( " ~ db_field ~ " LIKE\n  '%" ~ _sf ~ "%' )";
+          where_ ~= format(q"┃
+  %s
+┃",
+            _sf
+          );
+        }
+        return where_;
+      }
+      string[] _fields;
+      _fields ~= select_field_like("doc_objects.clean",                         tf.text);
+      _fields ~= select_field_like("metadata_and_text.title",                   tf.title);
+      _fields ~= select_field_like("metadata_and_text.creator_author",          tf.author);
+      _fields ~= select_field_like("metadata_and_text.uid",                     tf.uid);
+      _fields ~= select_field_like("metadata_and_text.src_filename_base",       tf.fn);
+      _fields ~= select_field_like("metadata_and_text.src_filename_base",       tf.src_filename_base);
+      _fields ~= select_field_like("metadata_and_text.language_document_char",  tf.language);
+      _fields ~= select_field_like("metadata_and_text.date_published",          tf.date);
+      _fields ~= select_field_like("metadata_and_text.classify_keywords",       tf.keywords);
+      _fields ~= select_field_like("metadata_and_text.classify_topic_register", tf.topic_register);
+      string[] fields;
+      foreach (f; _fields) {
+        if (!(f.empty)) { fields ~= f; }
+      }
+      string fields_str = "";
+      fields_str ~= fields.join(" AND ");
+      sql_select.the_body ~= format(q"┃
+SELECT
+  metadata_and_text.uid,
+  metadata_and_text.title,
+  metadata_and_text.creator_author_last_first,
+  metadata_and_text.creator_author,
+  metadata_and_text.src_filename_base,
+  metadata_and_text.language_document_char,
+  metadata_and_text.date_published,
+  metadata_and_text.classify_keywords,
+  metadata_and_text.classify_topic_register,
+  doc_objects.body,
+  doc_objects.seg_name,
+  doc_objects.ocn,
+  metadata_and_text.uid
+FROM
+  doc_objects,
+  metadata_and_text
+WHERE (
+  %s
+  )
+AND
+  doc_objects.uid_metadata_and_text = metadata_and_text.uid
+ORDER BY
+  metadata_and_text.creator_author_last_first,
+  metadata_and_text.date_published DESC,
+  metadata_and_text.title,
+  metadata_and_text.language_document_char,
+  metadata_and_text.src_filename_base,
+  doc_objects.ocn
+LIMIT %s OFFSET %s
+;┃",
+        fields_str,
+        cv.sql_match_limit,
+        cv.sql_match_offset,
+      );
+      (cv.checked_sql)
+      ? cgi.write(previous_next
+          ~ "<hr><font size=\"2\" color=\"#666666\">"
+          ~ sql_select.the_body.strip.split("\n  ").join(" ").split("\n").join("<br>")
+          ~ "</font>\n"
+        )
+      : "";
+      cgi.write(previous_next);
+      auto select_query_results = db.execute(sql_select.the_body).cached;
+      string _old_uid = "";
+      if (!select_query_results.empty) {
+        string _date_published = "0000";
+        string _close_para = "";
+        string _matched_ocn_open = "";
+        foreach (idx, row; select_query_results) {
+          if (row["uid"].as!string != _old_uid) {
+            _close_para = (idx == 1) ? "" : "</p>";
+            _matched_ocn_open = (idx == 1) ? "" : "<p class=\"matched_ocn\">";
+            _old_uid = row["uid"].as!string;
+            _date_published = (row["date_published"].as!string.match(regex(r"^([0-9]{4})")))
+            ? row["date_published"].as!string : "0000"; // used in regex that breaks if no match
+            auto m = _date_published.match(regex(r"^([0-9]{4})"));
+            string _date = (m.hit == "0000") ? "(year?) " : "(" ~ m.hit ~ ") ";
+            cgi.write(
+              _close_para
+              ~ "<hr><div class=\"publication\">"
+                ~ "<p class=\"publication\"><a href=\""
+                  ~ "https://" ~ conf.http_host ~ conf.doc_collection_sub_root ~ "/"
+                  ~ row["language_document_char"].as!string ~ "/html/"
+                  ~ row["src_filename_base"].as!string ~ "/"
+                  ~ "toc.html"
+                ~ "\">\""
+                  ~ row["title"].as!string ~ "\""
+                ~ "</a> "
+                ~ _date
+                ~ "[" ~ row["language_document_char"].as!string ~ "] "
+                ~ row["creator_author_last_first"].as!string
+                ~ " "
+                ~ show_matched_objects(row["src_filename_base"].as!string)
+                ~ "</p>"
+              ~ "</div>"
+            );
+          }
+          if (cv.results_type == "txt") {
+            if (row["ocn"].as!string != "0") {
+              cgi.write(
+                "<div class=\"flex-container\">"
+                ~ "<div class=\"textview_ocn\" style=\"flex: 0 0 1.2em\">"
+                  ~ "<p class=\"ocn_is\"><a href=\""
+                    ~ "https://" ~ conf.http_host ~ conf.doc_collection_sub_root ~ "/"
+                    ~ row["language_document_char"].as!string ~ "/html/"
+                    ~ row["src_filename_base"].as!string ~ "/"
+                    ~ row["seg_name"].as!string ~ ".html#" ~ row["ocn"].as!string
+                  ~ "\">"
+                    ~ row["ocn"].as!string
+                  ~ "</a>:</p>"
+                ~ "</div>"
+                ~ "<div class=\"textview_found\">"
+                  ~ highlight_text_matched(row["body"].as!string, tf.text)
+                ~ "</div>"
+                ~ "</div>"
+              );
+            } else {
+              cgi.write(
+                "<div class=\"flex-container\">"
+                ~ "<div class=\"textview_ocn\" style=\"flex: 0 0 1.2em\">"
+                  ~ "<p class=\"ocn_is\"><a href=\""
+                    ~ "https://" ~ conf.http_host ~ conf.doc_collection_sub_root ~ "/"
+                    ~ row["language_document_char"].as!string ~ "/html/"
+                    ~ row["src_filename_base"].as!string ~ "/toc.html"
+                  ~ "\">"
+                    ~ row["ocn"].as!string
+                  ~ "</a>:</p>"
+                ~ "</div>"
+                ~ "<div class=\"textview_found\">"
+                  ~ highlight_text_matched(row["body"].as!string, tf.text)
+                ~ "</div>"
+                ~ "</div>"
+              );
+            }
+          } else {
+            if (row["ocn"].as!string != "0") {
+              cgi.write(
+                _matched_ocn_open
+                ~ "<a href=\""
+                  ~ "https://" ~ conf.http_host ~ conf.doc_collection_sub_root ~ "/"
+                  ~ row["language_document_char"].as!string ~ "/html/"
+                  ~ row["src_filename_base"].as!string ~ "/"
+                  ~ row["seg_name"].as!string ~ ".html#" ~ row["ocn"].as!string
+                ~ "\">"
+                  ~ row["ocn"].as!string
+                ~ "</a>, "
+              );
+            } else {
+              cgi.write(
+                _matched_ocn_open
+                ~ "<a href=\""
+                  ~ "https://" ~ conf.http_host ~ conf.doc_collection_sub_root ~ "/"
+                  ~ row["language_document_char"].as!string ~ "/html/"
+                  ~ row["src_filename_base"].as!string ~ "/toc.html"
+                ~ "\">"
+                  ~ row["ocn"].as!string
+                ~ "</a>, "
+              );
+            }
+            _matched_ocn_open = "";
+          }
+        }
+        cgi.write( previous_next);
+
+      } else { // offset_not_beyond_limit = false;
+        cgi.write("select_query_results empty<p>\n");
+      }
+      cgi.write("<br><p class=\"center\"><a href=\"https://sisudoc.org/\" target=\"_top\">
+<label for=\"find\"><b>≅ SiSU spine</b></label>
+</a> <label for=\"find\">(generated) search form</label>
+<br><a href=\"https://git.sisudoc.org/\" target=\"_top\">
+  git</a>
+</p>
+");
+    }
+    sql_search_query;
+  }
+  {
+    db.close;
+  }
+  {
+    string tail = format(q"┃
+</body>
+┃");
+    cgi.write(tail);
+  }
+}
+mixin GenericMain!cgi_function_intro;
-- 
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