/* This script adds interactivity for wiki-history webpages.
 *
 * The main code is within the 'on-click' handler of the "diff" links.
 * Instead of standard redirection it fills-in two hidden inputs with
 * the appropriate values and submits the corresponding form.
 * A special care should be taken if some intermediate edits are hidden.
 *
 * For the sake of compatibility with ascetic browsers the code tries
 * to avoid modern API and ECMAScript constructs. This makes it less
 * readable and may be reconsidered in the future.
*/
window.addEventListener( 'load', function() {

document.getElementById("wh-form").method = "GET";

var wh_id  = document.getElementById("wh-id" );
var wh_pid = document.getElementById("wh-pid");
var wh_cleaner = document.getElementById("wh-cleaner");
var wh_collapser = document.getElementById("wh-collapser");

var wh_radios   = [];  // user-visible controls for baseline selection
var wh_hidden   =  0;  // current number of hidden (collapsed) rows
var wh_selected = -1;  // index of the currently selected radio-button

var wh_onRadio = function( event ){

  var indx = event.target.indx;
  if( wh_selected == indx ){

    wh_selected  = -1;
    event.target.checked = false;
  }
  else wh_selected = indx;
}
var wh_onDifflink = function( event ){

  event.preventDefault();
  var indx = event.target.indx;
  wh_id.value = wh_radios[indx].value;

  if( wh_hidden > 0 ){

    var p = indx + 1;
    if( wh_selected >= 0 ){

       var tr = wh_radios[wh_selected].parentElement.parentElement;
       if( ! tr.hidden )
          p = wh_selected;
    }
    while( p < wh_radios.length ){

      if( ! wh_radios[p].parentElement.parentElement.hidden )
	     break;
      p++;
    }
    if( p < wh_radios.length ){

       wh_pid.value = wh_radios[p].value;
       wh_pid.checked = true;
    }
    else {  // just render the wiki for the case of the first major edit

      var path = document.location.pathname.split("/");
      path.pop();
      var newpath = path.join("/") + "/info/" + wh_radios[indx].value;
      document.location = document.location.origin + newpath;
      return;
    }
  }
  else if( wh_selected >= 0 ) {

     wh_pid.value = wh_radios[wh_selected].value;
     wh_pid.checked = true;
  }
  else wh_pid.checked = false;

  document.getElementById("wh-form").submit();
}
var wh_onCleaner = function() {

   if( wh_selected >= 0 ) {

      wh_radios[wh_selected].checked = false;
      wh_selected = -1;
   }
}
var wh_onCollapser = function( event ){

  var collapsing = ( wh_hidden == 0 );
  for( var k = 0; k < wh_radios.length; k++ ){

    var radio = wh_radios[k];
    var tr = radio.parentElement.parentElement;
    if( tr.className == "wh-intermediate" ){

	  if( tr.hidden = ! tr.hidden )
	    wh_hidden++;
	  else
	    wh_hidden--;

    } else if( radio.iterspan )
               radio.iterspan.hidden = ! collapsing;
  }
  if( wh_hidden > 0 ) {

    wh_collapser.title="Show intermediate edits";
    wh_collapser.innerHTML = "&emsp;&#9851; " + wh_hidden;
  }
  else {

    wh_collapser.title="Hide intermediate edits";
    wh_collapser.innerHTML = "&emsp;&#9842;"
  }
}

var inputs = document.getElementsByTagName("input");
for( var k = 0, indx = 0; k < inputs.length; k++ ) {

   var r = inputs[k];
   if( r.type == "radio" && r.name == "baseline" ) {

      wh_radios.push( r );
	  r.indx = indx++;
      r.addEventListener( "click", wh_onRadio );
      r.disabled = false;
      var td = r.parentElement.nextElementSibling;
      r.iterspan = td.getElementsByTagName("span")[0];
   }
}
for( var edits = 0, k = wh_radios.length - 1; k >= 0; k-- ) {

   var td = wh_radios[k].parentElement.nextElementSibling;
   if( td.parentElement.className == "wh-intermediate" )

      edits++;

   else if( edits > 0 ){

      var span = td.getElementsByTagName("span")[0];
      span.innerHTML = "&ensp;&#9842;" + edits;
      wh_radios[k].iterspan = span;
      edits = 0;
      //   also:  &#8746; (union)   &#931; (sigma)   &#215; (times)
   }
}
var links = document.getElementsByTagName("a");
for( var i = 0, indx = 0; i < links.length; i++ ) {

   var l = links[i];
   if( l.className == "wh-difflink" ){

      l.indx = indx++;
      l.addEventListener( "click", wh_onDifflink );
   }
}
wh_cleaner.addEventListener( "click", wh_onCleaner );
wh_collapser.addEventListener( "click", wh_onCollapser );
wh_collapser.title="Hide intermediate edits";
wh_collapser.hidden = false;

}); // window.addEventListener( 'load' ...

  $(SRCDIR)/fossil.dom.js \
  $(SRCDIR)/fossil.fetch.js \
  $(SRCDIR)/fossil.info-diff.js \
  $(SRCDIR)/fossil.numbered-lines.js \
  $(SRCDIR)/fossil.page.fileedit.js \
  $(SRCDIR)/fossil.page.forumpost.js \
  $(SRCDIR)/fossil.page.pikchrshow.js \
  $(SRCDIR)/fossil.page.whistory.js \
  $(SRCDIR)/fossil.page.wikiedit.js \
  $(SRCDIR)/fossil.pikchr.js \
  $(SRCDIR)/fossil.popupwidget.js \
  $(SRCDIR)/fossil.storage.js \
  $(SRCDIR)/fossil.tabs.js \
  $(SRCDIR)/fossil.wikiedit-wysiwyg.js \
  $(SRCDIR)/graph.js \

** Additional parameters:
**
**     showid          Show RID values
**
** Show the complete change history for a single wiki page.
*/
void whistory_page(void){
  Stmt q;
  const char *zPageName;
  double rNow;
  int showRid;
  login_check_credentials();
  if( !g.perm.RdWiki ){ login_needed(g.anon.RdWiki); return; }
  zPageName = PD("name","");
  style_set_current_feature("wiki");
  style_header("History Of %s", zPageName);
  showRid = P("showid")!=0;
  db_prepare(&q,
    "SELECT"
    "  event.mtime,"
    "  blob.uuid,"
    "  coalesce(event.euser,event.user),"
    "  event.objid,"

    "  datetime(event.mtime)"
    " FROM event, blob, tag, tagxref"
    " WHERE event.type='w' AND blob.rid=event.objid"
    "   AND tag.tagname='wiki-%q'"
    "   AND tagxref.tagid=tag.tagid AND tagxref.srcid=event.objid"
    " ORDER BY event.mtime DESC",
    zPageName
  );
  @ <h2>History of <a href="%R/wiki?name=%T(zPageName)">%h(zPageName)</a></h2>
  form_begin( "id='wh-form'", "%R/wdiff" );
  @   <input id="wh-pid" name="pid" type="radio" hidden />
  @   <input id="wh-id"  name="id"  type="hidden" />
  @ </form>
  @ <style> .wh-clickable { cursor: pointer; } </style>
  @ <div class="brlist">
  @ <table>
  @ <thead><tr>
  @ <th>Age</th>
  @ <th>Hash</th>
  @ <th><span title="Baseline from which diffs are computed (click to unset)"
  @      id="wh-cleaner" class="wh-clickable">&#9875;</span></th>
  @ <th>User<span hidden class="wh-clickable"
  @                   id="wh-collapser">&emsp;&#9842;</span></th>
  if( showRid ){
    @ <th>RID</th>
  }
  @ <th>&nbsp;</th>
  @ </tr></thead><tbody>
  rNow = db_double(0.0, "SELECT julianday('now')");
  char zAuthor[64]; memset( zAuthor, 0, sizeof(zAuthor) );
  while( db_step(&q)==SQLITE_ROW ){
    double rMtime = db_column_double(&q, 0);
    const char *zUuid = db_column_text(&q, 1);
    const char *zUser = db_column_text(&q, 2);
    int wrid = db_column_int(&q, 3);

    const char *zWhen = db_column_text(&q, 4);
    /* sqlite3_int64 iMtime = (sqlite3_int64)(rMtime*86400.0); */
    char *zAge = human_readable_age(rNow - rMtime);
    if( strncmp( zAuthor, zUser, sizeof(zAuthor) - 1 ) == 0 ) {
      @ <tr class="wh-intermediate" title="%s(zWhen)">
    }
    else {
      strncpy( zAuthor, zUser, sizeof(zAuthor) - 1 );
      @ <tr class="wh-major" title="%s(zWhen)">
    }
    /* @ <td data-sortkey="%016llx(iMtime)">%s(zAge)</td> */
    @ <td>%s(zAge)</td>
    fossil_free(zAge);
    @ <td>%z(href("%R/info/%s",zUuid))%S(zUuid)</a></td>
    @ <td><input disabled type="radio" name="baseline" value="%S(zUuid)"/></td>
    @ <td>%h(zUser)<span class="wh-iterations" hidden /></td>
    if( showRid ){
      @ <td>%z(href("%R/artifact/%S",zUuid))%d(wrid)</a></td>
    }
    @ <td>%z(chref("wh-difflink","%R/wdiff?id=%S",zUuid))diff</a></td>
    @ </tr>
  }
  @ </tbody></table></div>
  db_finalize(&q);
  builtin_request_js("fossil.page.whistory.js");
  /* style_table_sorter(); */
  style_finish_page();
}

/*
** WEBPAGE: wdiff
**
** Show the changes to a wiki page.

    rid1 = name_to_typed_rid(zId, "w");
  }
  zId = db_text(0, "SELECT uuid FROM blob WHERE rid=%d", rid1);
  pW1 = manifest_get(rid1, CFTYPE_WIKI, 0);
  if( pW1==0 ) fossil_redirect_home();
  blob_init(&w1, pW1->zWiki, -1);
  zPid = P("pid");
  if( ( zPid==0 || zPid[0] == 0 ) && pW1->nParent ){
    zPid = pW1->azParent[0];
  }
  if( zPid && zPid[0] != 0 ){
    char *zDate;
    rid2 = name_to_typed_rid(zPid, "w");
    pW2 = manifest_get(rid2, CFTYPE_WIKI, 0);
    blob_init(&w2, pW2->zWiki, -1);
    @ <h2>Changes to \
    @ "%z(href("%R/whistory?name=%s",pW1->zWikiTitle))%h(pW1->zWikiTitle)</a>" \
    zDate = db_text(0, "SELECT datetime(%.16g)",pW2->rDate);