** WEBPAGE: brtimeline
**
** Show a timeline of all branches
**
** Query parameters:
**
**     ng            No graph
**     hide          Hide check-ins with "hidden" tag
**     brbg          Background color by branch name
**     ubg           Background color by user name
*/
void brtimeline_page(void){
  Blob sql = empty_blob;
  Stmt q;
  int tmFlags; /* Timeline display flags */

  login_check_credentials();
  if( !g.perm.Read ){ login_needed(g.anon.Read); return; }

  style_header("Branches");
  style_submenu_element("List", "brlist");
  login_anonymous_available();
  timeline_ss_submenu();
  cookie_render();
  @ <h2>The initial check-in for each branch:</h2>
  blob_append(&sql, timeline_query_for_www(), -1);
  blob_append_sql(&sql,
    "AND blob.rid IN (SELECT rid FROM tagxref"
    "                  WHERE tagtype>0 AND tagid=%d AND srcid!=0)", TAG_BRANCH);
  if( P("hide") ){
    blob_append_sql(&sql,
      " AND NOT EXISTS(SELECT 1 FROM tagxref"
      " WHERE tagid=%d AND tagtype>0 AND rid=blob.rid)\n", TAG_HIDDEN);
  }
  db_prepare(&q, "%s ORDER BY event.mtime DESC", blob_sql_text(&sql));

  blob_reset(&sql);
  /* Always specify TIMELINE_DISJOINT, or graph_finish() may fail because of too
  ** many descenders to (off-screen) parents. */
  tmFlags = TIMELINE_DISJOINT | TIMELINE_NOSCROLL;
  if( P("ng")==0 ) tmFlags |= TIMELINE_GRAPH;
  if( P("brbg")!=0 ) tmFlags |= TIMELINE_BRCOLOR;
  if( P("ubg")!=0 ) tmFlags |= TIMELINE_UCOLOR;
  www_print_timeline(&q, tmFlags, 0, 0, 0, brtimeline_extra);