MediaWiki:Gadget-GrAnnotations.js: Difference between revisions

Revision as of 10:47, 24 April 2026

/**
 * gr_annotations.js  —  grantha.io inline Comments + Bookmarks
 * ══════════════════════════════════════════════════════════════════════
 *
 * BEHAVIOUR (mirrors Google Docs)
 * ────────────────────────────────
 * 1. User selects text anywhere in mw-content-text.
 * 2. A floating action strip (FAB) appears to the right of the selection
 *    with two icon buttons: Comment and Bookmark.
 * 3. Clicking Comment:
 *    - Opens an inline composer card anchored to the selection position.
 *    - On submit: wraps the selected text in a yellow highlight span,
 *      saves the comment to <PageTitle>/Comments via MW edit API,
 *      posts a notification to the admin user talk page,
 *      and adds a card to the Comments tab of the right panel.
 * 4. Clicking Bookmark:
 *    - Opens a small composer to name the bookmark.
 *    - On submit: wraps selected text in a blue highlight span,
 *      saves bookmark in localStorage (per-user, per-page),
 *      and adds a card to the Bookmarks tab.
 *    - Clicking a bookmark card scrolls to and flashes that highlight.
 * 5. Right panel:
 *    - Slides in from the right as an overlay (no layout shift).
 *    - Tab 1: Comments  (loads from /Comments wiki page)
 *    - Tab 2: Bookmarks (loads from localStorage)
 *    - Panel can be closed via ✕ or clicking the backdrop.
 * 6. Clicking any comment/bookmark highlight in the text:
 *    - Opens the panel to the correct tab and scrolls to the card.
 *
 * STORAGE
 * ───────
 * Comments  → MediaWiki page: Talk:<PageTitle>/GrComments
 *             Talk namespace is excluded from XML/PDF exports and never
 *             shown in the content editor — comments cannot affect exports.
 *             Format: {{GrComment|id=…|author=…|timestamp=…|quote=…|text=…}}
 * Bookmarks → localStorage (per-user, per-page — not shared across users)
 *             Key: grantha_bm_<pageName>
 *
 * ADMIN NOTIFICATION
 * ──────────────────
 * On new comment: sends email via MW EmailUser API (action=emailuser).
 * Email contains the comment text and a direct anchor link to the passage.
 * Fallback: if admin has no email set, posts to User_talk:ADMIN_USER instead.
 * Requires $wgEnableEmail = true and $wgEnableUserEmail = true (MW defaults).
 *
 * DEPENDENCIES
 * ────────────
 * • jQuery (loaded by MediaWiki)
 * • mw.Api  (MediaWiki core)
 * • gr_annotations.css  (companion stylesheet)
 * • /images/commentary.svg, /images/bookmark.svg  (Hostinger)
 *
 * DEPLOY
 * ──────
 * Add both files to MediaWiki:Common.css / Common.js, or register as
 * a gadget in MediaWiki:Gadgets-definition:
 *   GrAnnotations[ResourceLoader|default]|gr_annotations.js|gr_annotations.css
 * ══════════════════════════════════════════════════════════════════════
 */

/* global mw, $ */
( function () {
  'use strict';

  // ── Configuration ────────────────────────────────────────────────────
  var ADMIN_USER  = 'GranthaGate';
  var CONTENT_SEL = '#mw-content-text';
  var BM_LS_KEY   = 'grantha_bm_'  + ( ( window.mw && mw.config.get( 'wgPageName' ) ) || '' );
  var CMT_LS_KEY  = 'grantha_cmt_' + ( ( window.mw && mw.config.get( 'wgPageName' ) ) || '' );
  var pageTitle   = ( window.mw && mw.config.get( 'wgPageName' ) ) || '';
  /* Comments stored on Talk:<PageTitle>/GrComments — talk namespace is
   * excluded from XML/PDF exports and never shown in the content editor,
   * so comments cannot tamper with document content or affect exports. */
  var commentsPage = 'Talk:' + pageTitle + '/GrComments';
  var currentUser  = ( window.mw && mw.config.get( 'wgUserName' ) ) || '';
  var userInitial  = currentUser ? currentUser.charAt( 0 ).toUpperCase() : '?';

  // Only run on content namespaces, not on the /Comments page itself
  if ( window.mw ) {
    var ns = mw.config.get( 'wgNamespaceNumber' );
    if ( ns < 0 ) return;
    if ( /\/Comments$/.test( pageTitle ) ) return;
  }

  // ── State ────────────────────────────────────────────────────────────
  var _sel        = null;   // current Selection snapshot
  var _selRange   = null;   // saved Range for wrapping
  var _selText    = '';     // selected text string
  var _selRect    = null;   // bounding rect of selection
  var _comments   = [];     // [{id, anchor, author, ts, quote, text}]
  var _bookmarks  = [];     // [{id, name, quote, anchorHtml, ts}]
  var _cmtLoaded  = false;
  var _activeTab  = 'comments';  // 'comments' | 'bookmarks'

  // ── Helpers ──────────────────────────────────────────────────────────
  function uid() {
    return 'gra_' + Date.now() + '_' + Math.random().toString(36).slice(2,7);
  }
  function esc( s ) {
    return String( s || '' )
      .replace(/&/g,'&amp;').replace(/</g,'&lt;')
      .replace(/>/g,'&gt;').replace(/"/g,'&quot;');
  }
  function nowIso() {
    return new Date().toISOString().replace(/\.\d{3}Z$/,'Z');
  }
  function fmtTs( ts ) {
    try {
      var d = new Date( ts );
      return d.toLocaleDateString('en-IN',{day:'numeric',month:'short',year:'numeric'})
           + ' ' + d.toLocaleTimeString('en-IN',{hour:'2-digit',minute:'2-digit',hour12:false});
    } catch(e){ return ts; }
  }
  function clamp( val, min, max ) { return Math.max(min, Math.min(max, val)); }

  // ── DOM references (populated in boot) ───────────────────────────────
  var $fab, $panel, $backdrop, $panelBody;
  var $cmpComposer, $cmpInput, $cmpSubmit;
  var $bmComposer, $bmInput, $bmSubmit;
  var $tabComments, $tabBookmarks;
  var $paneComments, $paneBookmarks;

  // ════════════════════════════════════════════════════════════════════
  // DOM BUILDER
  // ════════════════════════════════════════════════════════════════════

  function buildDom() {

    // ── Floating action strip ────────────────────────────────────────
    $fab = $( [
      '<div id="gra-fab">',
      '  <button class="gra-fab-btn" id="gra-fab-comment" type="button">',
      '    <span class="gra-icon gra-icon-comment"></span>',
      '    <span class="gra-fab-tooltip">Add comment</span>',
      '  </button>',
      '  <button class="gra-fab-btn" id="gra-fab-bookmark" type="button">',
      '    <span class="gra-icon gra-icon-bookmark"></span>',
      '    <span class="gra-fab-tooltip">Bookmark</span>',
      '  </button>',
      '</div>',
    ].join('') );
    $( 'body' ).append( $fab );

    // ── Comment composer card ────────────────────────────────────────
    $cmpComposer = $( [
      '<div class="gra-composer" id="gra-cmp-composer">',
      '  <div class="gra-composer-user">',
      '    <div class="gra-avatar" id="gra-cmp-avatar">' + esc(userInitial) + '</div>',
      '    <div class="gra-composer-name" id="gra-cmp-name">' + esc(currentUser || 'Anonymous') + '</div>',
      '  </div>',
      '  <textarea class="gra-composer-input" id="gra-cmp-input"',
      '    placeholder="Comment or add others with @…" rows="3"></textarea>',
      '  <div class="gra-composer-actions">',
      '    <button class="gra-btn-cancel" id="gra-cmp-cancel">Cancel</button>',
      '    <button class="gra-btn-submit" id="gra-cmp-submit" disabled>Comment</button>',
      '  </div>',
      '</div>',
    ].join('') );
    $( 'body' ).append( $cmpComposer );

    // ── Bookmark composer card ────────────────────────────────────────
    $bmComposer = $( [
      '<div class="gra-bm-composer" id="gra-bm-composer">',
      '  <div class="gra-bm-composer-label">',
      '    <span class="gra-icon gra-icon-bookmark"></span>',
      '    Save bookmark',
      '  </div>',
      '  <input class="gra-composer-input" id="gra-bm-input"',
      '    type="text" placeholder="Bookmark name…" autocomplete="off">',
      '  <div class="gra-composer-actions">',
      '    <button class="gra-btn-cancel" id="gra-bm-cancel">Cancel</button>',
      '    <button class="gra-btn-submit" id="gra-bm-submit">Save</button>',
      '  </div>',
      '</div>',
    ].join('') );
    $( 'body' ).append( $bmComposer );

    // ── Right panel ───────────────────────────────────────────────────
    $panel = $( [
      '<div id="gra-panel">',
      '  <div id="gra-panel-head">',
      '    <div></div>',
      '    <button id="gra-panel-close" title="Close panel">✕</button>',
      '  </div>',
      '  <div id="gra-tabs">',
      '    <button class="gra-tab gra-tab-active" id="gra-tab-comments">',
      '      <span class="gra-icon gra-icon-comment"></span> Comments',
      '    </button>',
      '    <button class="gra-tab" id="gra-tab-bookmarks">',
      '      <span class="gra-icon gra-icon-bookmark"></span> Bookmarks',
      '    </button>',
      '  </div>',
      '  <div id="gra-panel-body">',
      '    <div class="gra-pane gra-pane-active" id="gra-pane-comments"></div>',
      '    <div class="gra-pane"              id="gra-pane-bookmarks"></div>',
      '  </div>',
      '</div>',
    ].join('') );
    $( 'body' ).append( $panel );

    // Backdrop
    $backdrop = $('<div id="gra-backdrop"></div>');
    $( 'body' ).append( $backdrop );

    // Persistent toggle button — always visible, opens the panel
    var $toggle = $( [
      '<button id="gra-toggle" title="Comments &amp; Bookmarks">',
      '  <span class="gra-icon gra-icon-comment" id="gra-toggle-icon"></span>',
      '  <span id="gra-toggle-badge"></span>',
      '</button>',
    ].join('') );
    $( 'body' ).append( $toggle );
    $toggle.on( 'click', function() {
      if ( $panel.hasClass('gra-panel-open') ) {
        closePanel();
      } else {
        openPanel( _activeTab );
      }
    } );

    // Cache references
    $panelBody     = $( '#gra-panel-body' );
    // Set panel title to page name
    $( '#gra-panel-head div' ).first()
      .text( pageTitle.replace(/_/g,' ').split('/')[0].slice(0,30) )
      .css({ 'font-size':'13px', 'font-weight':'600', 'color':'#5a3a00' });
    $tabComments   = $( '#gra-tab-comments' );
    $tabBookmarks  = $( '#gra-tab-bookmarks' );
    $paneComments  = $( '#gra-pane-comments' );
    $paneBookmarks = $( '#gra-pane-bookmarks' );
    $cmpInput      = $( '#gra-cmp-input' );
    $cmpSubmit     = $( '#gra-cmp-submit' );
    $bmInput       = $( '#gra-bm-input' );
    $bmSubmit      = $( '#gra-bm-submit' );

    // Disable comment submit when not logged in
    if ( !currentUser ) {
      $cmpSubmit.prop( 'disabled', true );
      $cmpComposer.find( '.gra-composer-actions' )
        .prepend( '<a href="' + esc( mw ? mw.util.getUrl('Special:UserLogin') : '/wiki/Special:UserLogin' ) +
                  '" style="font-size:11px;color:#999;margin-right:auto">Log in to comment</a>' );
    }
  }

  // ════════════════════════════════════════════════════════════════════
  // FLOATING ACTION STRIP — position & show/hide
  // ════════════════════════════════════════════════════════════════════

  function showFab( rect ) {
    if ( !rect ) return;
    // FAB uses position:fixed — coords are viewport-relative (no scroll offset needed).
    // Place strip to the right of the selection; if it would go off-screen, place to the left.
    var fabW = 46; var fabH = 84;
    var top  = rect.top + ( rect.height / 2 ) - ( fabH / 2 );
    var left = rect.right + 10;

    // If too close to right edge, flip to left of selection
    if ( left + fabW > window.innerWidth - 8 ) {
      left = rect.left - fabW - 10;
    }
    // Clamp vertically within viewport
    top = clamp( top, 8, window.innerHeight - fabH - 8 );
    // Clamp horizontally
    left = clamp( left, 8, window.innerWidth - fabW - 8 );

    $fab.css({ top: top + 'px', left: left + 'px' }).addClass('gra-fab-visible');
  }

  function hideFab() {
    $fab.removeClass('gra-fab-visible');
  }

  // ════════════════════════════════════════════════════════════════════
  // SELECTION HANDLING
  // ════════════════════════════════════════════════════════════════════

  function captureSelection() {
    var sel = window.getSelection();
    if ( !sel || sel.isCollapsed || !sel.rangeCount ) return false;

    var range    = sel.getRangeAt(0);
    var text     = sel.toString().trim();
    if ( !text || text.length < 2 ) return false;

    // Must be inside mw-content-text
    var contentEl = document.querySelector( CONTENT_SEL );
    if ( !contentEl ) return false;
    var startEl = range.commonAncestorContainer;
    if ( startEl.nodeType === 3 ) startEl = startEl.parentNode;
    if ( !contentEl.contains( startEl ) ) return false;

    _selText  = text;
    _selRange = range.cloneRange();
    _selRect  = range.getBoundingClientRect();
    return true;
  }

  // ════════════════════════════════════════════════════════════════════
  // COMPOSER POSITIONING
  // ════════════════════════════════════════════════════════════════════

  function positionComposer( $el ) {
    if ( !_selRect ) return;
    // position:fixed — viewport coords only
    var top  = _selRect.bottom + 8;
    var left = _selRect.left;
    // Keep composer within viewport
    var composerW = 308;
    if ( left + composerW > window.innerWidth - 8 ) {
      left = window.innerWidth - composerW - 8;
    }
    left = Math.max( left, 8 );
    // If composer would appear below viewport, show above selection instead
    if ( top + 160 > window.innerHeight ) {
      top = _selRect.top - 170;
    }
    top = Math.max( top, 8 );
    $el.css({ top: top + 'px', left: left + 'px' });
  }

  // ════════════════════════════════════════════════════════════════════
  // WRAP SELECTION IN HIGHLIGHT SPAN
  // ════════════════════════════════════════════════════════════════════

  function wrapSelection( id, cssClass ) {
    if ( !_selRange ) return null;
    try {
      var span = document.createElement('span');
      span.className = cssClass;
      span.setAttribute('data-gra-id', id);
      _selRange.surroundContents( span );
      return span;
    } catch ( e ) {
      // surroundContents fails for multi-element selections;
      // extract and wrap the fragment
      try {
        var frag = _selRange.extractContents();
        var span2 = document.createElement('span');
        span2.className = cssClass;
        span2.setAttribute('data-gra-id', id);
        span2.appendChild( frag );
        _selRange.insertNode( span2 );
        return span2;
      } catch(e2) { return null; }
    }
  }

  // ════════════════════════════════════════════════════════════════════
  // COMMENT FLOW
  // ════════════════════════════════════════════════════════════════════

  function openCommentComposer() {
    hideFab();
    // Keep selection alive — blur the textarea briefly then refocus
    positionComposer( $cmpComposer );
    $cmpComposer.addClass('gra-composer-visible');
    $cmpInput.val('').focus();
  }

  function closeCommentComposer() {
    $cmpComposer.removeClass('gra-composer-visible');
    $cmpInput.val('');
    $cmpSubmit.prop('disabled', true);
    _selRange = null;
    _selText  = '';
    _selRect  = null;
  }

  function submitComment() {
    var text  = $cmpInput.val().trim();
    if ( !text || !currentUser ) return;
    var id    = uid();
    var ts    = nowIso();
    var quote = _selText.slice(0, 120) + ( _selText.length > 120 ? '…' : '' );

    // Wrap text in highlight span
    var span = wrapSelection( id, 'gra-comment-highlight' );
    if ( span ) span.setAttribute('data-gra-quote', quote);

    // Save locally
    var entry = { id:id, author:currentUser, ts:ts, quote:quote, text:text };
    _comments.push( entry );
    // Persist highlight anchor so it survives page refresh
    persistCommentHighlight( id, quote );

    // Persist to wiki
    saveCommentToWiki( id, quote, text, ts );
    notifyAdmin( _activeId || '', quote, text, ts );

    // Update panel
    renderCommentCards();
    closeCommentComposer();
    openPanel('comments');
  }

  function saveCommentToWiki( id, quote, text, ts ) {
    if ( !window.mw ) return;
    var api = new mw.Api();
    api.get({
      action:'query', prop:'revisions', titles:commentsPage,
      rvprop:'content', rvslots:'main', formatversion:2,
    }).then(function(data){
      var page = (data.query.pages||[])[0]||{};
      var existing = '';
      if (page.revisions && page.revisions[0]) {
        var rev = page.revisions[0];
        existing = rev.slots ? rev.slots.main.content : rev['*'] || '';
      }
      var entry = '{{GrComment\n'
                + '| id        = ' + id          + '\n'
                + '| author    = ' + currentUser + '\n'
                + '| timestamp = ' + ts          + '\n'
                + '| quote     = ' + quote.replace(/\n/g,' ') + '\n'
                + '| text      = ' + text.replace(/\n/g,' ')  + '\n'
                + '}}\n';
      var updated = (existing.trim() ? existing.trim() + '\n\n' : '') + entry;
      api.postWithEditToken({
        action:'edit', title:commentsPage, text:updated,
        summary:'New comment by ' + currentUser + ' on [[' + pageTitle + ']] (stored off-page)',
        bot:0,
      }).catch(function(){});
    }).catch(function(){});
  }

  function notifyAdmin( anchorId, quote, commentText, ts ) {
    /* Send a real email to the admin via MW's built-in EmailUser API.
     * This requires:
     *   1. The admin account (ADMIN_USER) has a confirmed email address set
     *      in Special:Preferences.
     *   2. $wgEnableEmail and $wgEnableUserEmail are true in LocalSettings.php
     *      (both are true by default in MW).
     * The email contains a direct scrollable anchor link to the passage. */
    if ( !window.mw || !ADMIN_USER ) return;

    /* Build a deep-link URL with the anchor ID so the admin can jump
     * directly to the highlighted passage with one click. */
    var articlePath = ( mw.config.get('wgArticlePath') || '/wiki/$1' )
                        .replace( '$1', pageTitle );
    var anchorLink  = window.location.origin + articlePath
                    + ( anchorId ? '#' + anchorId : '' );

    var pageDisplay = pageTitle.replace( /_/g, ' ' );
    var subject     = '[Grantha] New comment on "' + pageDisplay + '"';
    var body        = 'A new comment has been posted on ' + pageDisplay + '.

'
                    + 'Posted by : ' + ( currentUser || 'Anonymous' ) + '
'
                    + 'Time      : ' + ts + '
'
                    + 'Passage   : "' + quote + '"

'
                    + 'Comment   :
' + commentText + '

'
                    + '──────────────────────────────────
'
                    + 'Jump to passage:
' + anchorLink + '

'
                    + 'View all comments:
'
                    + window.location.origin
                    + ( mw.config.get('wgArticlePath') || '/wiki/$1' )
                        .replace( '$1', 'Talk:' + pageTitle + '/GrComments' )
                    + '
';

    new mw.Api().post({
      action:   'emailuser',
      target:   ADMIN_USER,
      subject:  subject,
      text:     body,
      token:    mw.user.tokens.get( 'csrfToken' ),
    }).catch(function(){
      /* EmailUser failed (e.g. admin has no email set) — fall back to
       * a talk-page notification so the admin still gets an Echo alert. */
      if ( !currentUser ) return;
      var adminTalk = 'User_talk:' + ADMIN_USER;
      var wikimsg = '== New comment on [[' + pageDisplay + ']] ==
'
                  + '; By: ' + ( currentUser || 'Anonymous' ) + '
'
                  + '; Passage: //' + quote + '//
'
                  + '; Link: ' + anchorLink + '

'
                  + commentText.slice(0,500)
                  + ( commentText.length > 500 ? '
…' : '' )
                  + '

[[User:Chandrashekars|Chandrashekars]] ([[User talk:Chandrashekars|talk]]) 10:47, 24 April 2026 (UTC)';
      new mw.Api().postWithEditToken({
        action:'edit', title:adminTalk, section:'new',
        sectiontitle:'Comment on ' + pageDisplay,
        text:wikimsg,
        summary:'Comment notification from [[' + pageDisplay + ']]',
        bot:0,
      }).catch(function(){});
    });
  }

  // ── Load comments from /Comments wiki page ───────────────────────
  function loadComments( cb ) {
    if ( _cmtLoaded ) { if (cb) cb(); return; }
    if ( !window.mw ) { _cmtLoaded=true; if(cb)cb(); return; }
    new mw.Api().get({
      action:'query', prop:'revisions', titles:commentsPage,
      rvprop:'content', rvslots:'main', formatversion:2,
    }).then(function(data){
      var page = (data.query.pages||[])[0]||{};
      var wt = '';
      if (page.revisions && page.revisions[0]) {
        var rev = page.revisions[0];
        wt = rev.slots ? rev.slots.main.content : rev['*'] || '';
      }
      _comments = parseCommentsWt(wt);
      _cmtLoaded = true;
      if (cb) cb();
    }).catch(function(){ _cmtLoaded=true; if(cb)cb(); });
  }

  function parseCommentsWt( wt ) {
    var out = [];
    var re = /\{\{GrComment\s*\n([\s\S]*?)\}\}/g;
    var m;
    while ((m = re.exec(wt)) !== null) {
      var block = m[1];
      var f = {};
      var lr = /\|\s*([\w_]+)\s*=\s*([\s\S]*?)(?=\n\||\n\}\}|$)/g;
      var lm;
      while ((lm = lr.exec(block)) !== null) {
        f[lm[1].trim()] = lm[2].trim();
      }
      if (f.id) out.push({
        id:f.id, author:f.author||'Anonymous',
        ts:f.timestamp||'', quote:f.quote||'', text:f.text||''
      });
    }
    return out;
  }

  // ════════════════════════════════════════════════════════════════════
  // BOOKMARK FLOW
  // ════════════════════════════════════════════════════════════════════

  function openBookmarkComposer() {
    hideFab();
    positionComposer( $bmComposer );
    $bmComposer.addClass('gra-composer-visible');
    $bmInput.val('').focus();
  }

  function closeBookmarkComposer() {
    $bmComposer.removeClass('gra-composer-visible');
    $bmInput.val('');
    _selRange = null;
    _selText  = '';
    _selRect  = null;
  }

  function submitBookmark() {
    var name  = $bmInput.val().trim() || ( 'Bookmark ' + (_bookmarks.length+1) );
    var id    = uid();
    var ts    = nowIso();
    var quote = _selText.slice(0,120) + (_selText.length>120?'…':'');

    // Wrap text in bookmark highlight span
    var span = wrapSelection( id, 'gra-bookmark-highlight' );
    if ( span ) {
      span.setAttribute('data-gra-id', id);
      span.setAttribute('data-gra-name', name);
    }

    var entry = { id:id, name:name, quote:quote, ts:ts };
    _bookmarks.push( entry );
    persistBookmarks();
    renderBookmarkCards();
    closeBookmarkComposer();
    openPanel('bookmarks');
  }

  function deleteBookmark( id ) {
    _bookmarks = _bookmarks.filter(function(b){ return b.id !== id; });
    // Remove highlight span, replace with its text content
    var span = document.querySelector('[data-gra-id="' + id + '"].gra-bookmark-highlight');
    if (span) {
      var parent = span.parentNode;
      while (span.firstChild) parent.insertBefore(span.firstChild, span);
      parent.removeChild(span);
    }
    persistBookmarks();
    renderBookmarkCards();
  }

  function persistBookmarks() {
    try { localStorage.setItem(BM_LS_KEY, JSON.stringify(_bookmarks)); } catch(e){}
  }

  function loadBookmarks() {
    try {
      var raw = localStorage.getItem(BM_LS_KEY);
      if (raw) _bookmarks = JSON.parse(raw) || [];
    } catch(e){ _bookmarks = []; }
  }

  // ════════════════════════════════════════════════════════════════════
  // PANEL — open / close / tabs
  // ════════════════════════════════════════════════════════════════════

  function openPanel( tab ) {
    _activeTab = tab || _activeTab;
    switchTab( _activeTab );
    $panel.addClass('gra-panel-open');
    $backdrop.addClass('gra-backdrop-visible');
  }

  function closePanel() {
    $panel.removeClass('gra-panel-open');
    $backdrop.removeClass('gra-backdrop-visible');
  }

  function switchTab( tab ) {
    _activeTab = tab;
    $tabComments.toggleClass('gra-tab-active', tab==='comments');
    $tabBookmarks.toggleClass('gra-tab-active', tab==='bookmarks');
    $paneComments.toggleClass('gra-pane-active', tab==='comments');
    $paneBookmarks.toggleClass('gra-pane-active', tab==='bookmarks');
    if (tab==='comments') {
      loadComments(function(){ renderCommentCards(); });
    } else {
      renderBookmarkCards();
    }
  }

  // ════════════════════════════════════════════════════════════════════
  // RENDER CARDS
  // ════════════════════════════════════════════════════════════════════

  function renderCommentCards() {
    if ( _comments.length === 0 ) {
      $paneComments.html('<div class="gra-empty-state">No comments yet.<br>Select text and click 💬 to add one.</div>');
      return;
    }
    var html = '';
    _comments.slice().reverse().forEach(function(c){
      html += '<div class="gra-comment-card" data-gra-id="' + esc(c.id) + '">'
            + '<div class="gra-card-header">'
            + '<div class="gra-avatar">' + esc((c.author||'?').charAt(0).toUpperCase()) + '</div>'
            + '<div class="gra-card-meta">'
            + '<div class="gra-card-author">' + esc(c.author) + '</div>'
            + (c.ts ? '<div class="gra-card-ts">' + esc(fmtTs(c.ts)) + '</div>' : '')
            + '</div>'
            + '</div>'
            + (c.quote ? '<div class="gra-card-quote">' + esc(c.quote) + '</div>' : '')
            + '<div class="gra-card-text">' + esc(c.text) + '</div>'
            + '</div>';
    });
    $paneComments.html(html);
  }

  function renderBookmarkCards() {
    if ( _bookmarks.length === 0 ) {
      $paneBookmarks.html('<div class="gra-empty-state">No bookmarks yet.<br>Select text and click 🔖 to save a bookmark.</div>');
      return;
    }
    var html = '';
    _bookmarks.slice().reverse().forEach(function(b){
      html += '<div class="gra-bookmark-card" data-gra-id="' + esc(b.id) + '">'
            + '<span class="gra-icon gra-icon-bookmark"></span>'
            + '<div class="gra-bookmark-info">'
            + '<div class="gra-bookmark-name">' + esc(b.name) + '</div>'
            + (b.quote ? '<div class="gra-bookmark-quote">' + esc(b.quote) + '</div>' : '')
            + '</div>'
            + '<button class="gra-bookmark-del" data-del-id="' + esc(b.id) + '" title="Remove bookmark">×</button>'
            + '</div>';
    });
    $paneBookmarks.html(html);
  }

  // ════════════════════════════════════════════════════════════════════
  // SCROLL TO HIGHLIGHT
  // ════════════════════════════════════════════════════════════════════

  function scrollToHighlight( id ) {
    var el = document.querySelector('[data-gra-id="' + id + '"]');
    if (!el) return;
    el.scrollIntoView({ behavior:'smooth', block:'center' });
    el.classList.add('gra-hl-active');
    setTimeout(function(){ el.classList.remove('gra-hl-active'); }, 2000);
  }

  // ════════════════════════════════════════════════════════════════════
  // EVENT WIRING
  // ════════════════════════════════════════════════════════════════════

  function wireEvents() {

    // ── Selection → show FAB ──────────────────────────────────────
    $( document ).on('mouseup keyup', function(e){
      // Small delay so selection is committed
      setTimeout(function(){
        if ( $cmpComposer.hasClass('gra-composer-visible') ) return;
        if ( $bmComposer.hasClass('gra-composer-visible') ) return;
        if ( captureSelection() ) {
          showFab( _selRect );
        } else {
          hideFab();
        }
      }, 20);
    });

    // ── Click outside → hide FAB ──────────────────────────────────
    $( document ).on('mousedown', function(e){
      var $t = $(e.target);
      if ( !$t.closest('#gra-fab').length &&
           !$t.closest('.gra-composer').length &&
           !$t.closest('.gra-bm-composer').length ) {
        hideFab();
      }
    });

    // ── FAB: Comment ──────────────────────────────────────────────
    $( '#gra-fab-comment' ).on('click', function(e){
      e.preventDefault();
      e.stopPropagation();
      if ( !captureSelection() ) return;
      openCommentComposer();
    });

    // ── FAB: Bookmark ─────────────────────────────────────────────
    $( '#gra-fab-bookmark' ).on('click', function(e){
      e.preventDefault();
      e.stopPropagation();
      if ( !captureSelection() ) return;
      openBookmarkComposer();
    });

    // ── Comment composer ──────────────────────────────────────────
    $cmpInput.on('input', function(){
      $cmpSubmit.prop('disabled', !$(this).val().trim() || !currentUser);
    });
    $( '#gra-cmp-cancel' ).on('click', function(){
      closeCommentComposer();
      hideFab();
    });
    $cmpSubmit.on('click', submitComment);
    $cmpInput.on('keydown', function(e){
      // Ctrl+Enter or Cmd+Enter submits
      if ((e.ctrlKey||e.metaKey) && e.key==='Enter') { submitComment(); }
      if (e.key==='Escape') { closeCommentComposer(); hideFab(); }
    });

    // ── Bookmark composer ─────────────────────────────────────────
    $( '#gra-bm-cancel' ).on('click', function(){
      closeBookmarkComposer();
      hideFab();
    });
    $bmSubmit.on('click', submitBookmark);
    $bmInput.on('keydown', function(e){
      if (e.key==='Enter') submitBookmark();
      if (e.key==='Escape'){ closeBookmarkComposer(); hideFab(); }
    });

    // ── Panel close ───────────────────────────────────────────────
    $( '#gra-panel-close' ).on('click', closePanel);
    $backdrop.on('click', closePanel);

    // ── Tab switching ─────────────────────────────────────────────
    $tabComments.on('click', function(){ switchTab('comments'); });
    $tabBookmarks.on('click', function(){ switchTab('bookmarks'); });

    // ── Panel: click comment card → scroll to highlight ───────────
    $paneComments.on('click', '.gra-comment-card', function(){
      var id = $(this).attr('data-gra-id');
      if (id) scrollToHighlight(id);
    });

    // ── Panel: click bookmark card → scroll to highlight ──────────
    $paneBookmarks.on('click', '.gra-bookmark-card', function(e){
      if ($(e.target).hasClass('gra-bookmark-del')) return;
      var id = $(this).attr('data-gra-id');
      if (id) scrollToHighlight(id);
    });

    // ── Panel: delete bookmark ────────────────────────────────────
    $paneBookmarks.on('click', '.gra-bookmark-del', function(e){
      e.stopPropagation();
      var id = $(this).attr('data-del-id');
      if (id) deleteBookmark(id);
    });

    // ── Click on highlight in text → open panel ───────────────────
    $( CONTENT_SEL ).on('click', '.gra-comment-highlight', function(){
      var id = $(this).attr('data-gra-id');
      openPanel('comments');
      // After render, scroll to matching card
      setTimeout(function(){
        var $card = $paneComments.find('[data-gra-id="'+id+'"]');
        if ($card.length) {
          $card.addClass('gra-card-active');
          $card[0].scrollIntoView({behavior:'smooth',block:'nearest'});
          setTimeout(function(){ $card.removeClass('gra-card-active'); }, 2000);
        }
      }, 100);
    });

    $( CONTENT_SEL ).on('click', '.gra-bookmark-highlight', function(){
      var id = $(this).attr('data-gra-id');
      openPanel('bookmarks');
      setTimeout(function(){
        var $card = $paneBookmarks.find('[data-gra-id="'+id+'"]');
        if ($card.length) $card[0].scrollIntoView({behavior:'smooth',block:'nearest'});
      }, 100);
    });

    // ── Escape key closes panels / composers ─────────────────────
    $( document ).on('keydown', function(e){
      if (e.key==='Escape'){
        if ($cmpComposer.hasClass('gra-composer-visible')) { closeCommentComposer(); hideFab(); }
        else if ($bmComposer.hasClass('gra-composer-visible')) { closeBookmarkComposer(); hideFab(); }
        else closePanel();
      }
    });
  }

  // ════════════════════════════════════════════════════════════════════
  // RESTORE BOOKMARK HIGHLIGHTS from localStorage on page load
  // ════════════════════════════════════════════════════════════════════
  // Bookmarks store the quote text. We do a best-effort text search
  // in the content to re-wrap the same span after page reload.
  // (Comments are server-stored and we only re-render cards, not re-wrap.)

  // ── Persist comment highlight anchors to localStorage ────────────────
  // We only store {id, quote} — the full comment data lives on the wiki.
  // On reload, restoreCommentHighlights re-wraps the quote text in the page
  // so the yellow highlight appears again.

  function persistCommentHighlight( id, quote ) {
    try {
      var stored = JSON.parse( localStorage.getItem( CMT_LS_KEY ) || '[]' );
      // Deduplicate
      stored = stored.filter( function(h){ return h.id !== id; } );
      stored.push( { id: id, quote: quote } );
      localStorage.setItem( CMT_LS_KEY, JSON.stringify( stored ) );
    } catch(e){}
  }

  function restoreCommentHighlights() {
    var stored = [];
    try { stored = JSON.parse( localStorage.getItem( CMT_LS_KEY ) || '[]' ); } catch(e){}
    stored.forEach( function(h) {
      if ( !h.quote || !h.id ) return;
      if ( document.querySelector( '[data-gra-id="' + h.id + '"].gra-comment-highlight' ) ) return;
      var needle = h.quote.replace(/…$/, '').trim().slice(0, 80);
      if ( !needle ) return;
      var range = findTextInContent( document.querySelector(CONTENT_SEL), needle );
      if ( range ) {
        var span = document.createElement('span');
        span.className = 'gra-comment-highlight';
        span.setAttribute('data-gra-id', h.id);
        try { range.surroundContents(span); } catch(e){}
      }
    });
  }

  function restoreBookmarkHighlights() {
    _bookmarks.forEach(function(b){
      if ( !b.quote ) return;
      // Already highlighted from this session
      if ( document.querySelector('[data-gra-id="'+b.id+'"].gra-bookmark-highlight') ) return;
      // Text search — find first occurrence of quote in content
      var contentEl = document.querySelector( CONTENT_SEL );
      if (!contentEl) return;
      var needle = b.quote.replace(/…$/,'').trim().slice(0,60);
      if (!needle) return;
      // Walk text nodes to find a match
      var found = findTextInContent( contentEl, needle );
      if (found) {
        var span = document.createElement('span');
        span.className = 'gra-bookmark-highlight';
        span.setAttribute('data-gra-id', b.id);
        span.setAttribute('data-gra-name', b.name);
        try {
          found.surroundContents(span);
        } catch(e){}
      }
    });
  }

  function findTextInContent( root, needle ) {
    // Returns a Range covering the first occurrence of needle in root's text
    var text = root.textContent || '';
    var idx  = text.indexOf(needle);
    if (idx < 0) return null;
    // Walk to find the exact text nodes
    var iter = document.createNodeIterator(root, NodeFilter.SHOW_TEXT, null, false);
    var pos  = 0;
    var node, startNode, startOffset, endNode, endOffset;
    while ((node = iter.nextNode())) {
      var len = node.nodeValue.length;
      if (!startNode && pos+len > idx) {
        startNode   = node;
        startOffset = idx - pos;
      }
      var endIdx = idx + needle.length;
      if (startNode && pos+len >= endIdx) {
        endNode   = node;
        endOffset = endIdx - pos;
        break;
      }
      pos += len;
    }
    if (!startNode || !endNode) return null;
    var range = document.createRange();
    range.setStart(startNode, startOffset);
    range.setEnd(endNode, endOffset);
    return range;
  }

  // ════════════════════════════════════════════════════════════════════
  // BOOT
  // ════════════════════════════════════════════════════════════════════

  $( function () {
    buildDom();
    wireEvents();
    loadBookmarks();
    restoreBookmarkHighlights();
    restoreCommentHighlights();
    // Pre-load comment count in background
    loadComments(function(){
      // Update tab label with count
      if (_comments.length > 0) {
        $tabComments.find('span.gra-icon').after(
          ' <span style="background:#e53935;color:#fff;border-radius:9px;' +
          'font-size:10px;padding:0 5px;margin-left:2px;">' + _comments.length + '</span>'
        );
        // Update toggle badge
        var $badge = $( '#gra-toggle-badge' );
        if ( $badge.length ) $badge.text( _comments.length ).css('display','flex');
      }
    });
  } );

}() );