Fossil

**
**    a=DATE     Only show changes after DATE
**    b=DATE     Only show changes before DATE
**    n=NUM      Show the first NUM changes only
**    brbg       Background color by branch name
**    ubg        Background color by user name
**    ci=UUID    Ancestors of a particular check-in
**    fco=BOOL   Show only first occurrence of each version if true (default)
*/
void finfo_page(void){
  Stmt q;
  const char *zFilename;
  char zPrevDate[20];
  const char *zA;
  const char *zB;
  int n;
  int baseCheckin;
  int fnid;

  Blob title;
  Blob sql;
  HQuery url;
  GraphContext *pGraph;
  int brBg = P("brbg")!=0;
  int uBg = P("ubg")!=0;
  int firstChngOnly = atoi(PD("fco","1"))!=0;
  int fDebug = atoi(PD("debug","0"));
  int fShowId = P("showid")!=0;

  login_check_credentials();
  if( !g.perm.Read ){ login_needed(); return; }
  style_header("File History");
  login_anonymous_available();
  url_initialize(&url, "finfo");
  if( brBg ) url_add_parameter(&url, "brbg", 0);
  if( uBg ) url_add_parameter(&url, "ubg", 0);
  baseCheckin = name_to_rid_www("ci");
  if( baseCheckin ) firstChngOnly = 1;
  if( !firstChngOnly ) url_add_parameter(&url, "fco", "0");

  zPrevDate[0] = 0;
  zFilename = PD("name","");
  fnid = db_int(0, "SELECT fnid FROM filename WHERE name=%Q", zFilename);
  if( fnid==0 ){
    @ No such file: %h(zFilename)
    style_footer();
    return;
  }
  url_add_parameter(&url, "name", zFilename);
  blob_zero(&sql);
  blob_append_sql(&sql,
    "SELECT"
    " datetime(event.mtime%s),"                      /* Date of change */
    " coalesce(event.ecomment, event.comment),"      /* Check-in comment */
    " coalesce(event.euser, event.user),"            /* User who made chng */
    " mlink.pid,"                                    /* Parent file rid */
    " mlink.fid,"                                    /* File rid */
    " (SELECT uuid FROM blob WHERE rid=mlink.pid),"  /* Parent file uuid */
    " (SELECT uuid FROM blob WHERE rid=mlink.fid),"  /* Current file uuid */
    " (SELECT uuid FROM blob WHERE rid=mlink.mid),"  /* Check-in uuid */
    " event.bgcolor,"                                /* Background color */
    " (SELECT value FROM tagxref WHERE tagid=%d AND tagtype>0"
                                " AND tagxref.rid=mlink.mid)," /* Branchname */
    " mlink.mid,"                                    /* check-in ID */
    " mlink.pfnid",                                  /* Previous filename */
    timeline_utc(), TAG_BRANCH
  );
  if( firstChngOnly ){
    blob_append_sql(&sql,
        ", min(CASE (SELECT value FROM tagxref"
                    " WHERE tagtype>0 AND tagid=%d"
                    "   AND tagxref.rid=mlink.mid)"
             " WHEN 'trunk' THEN event.mtime-10000 ELSE event.mtime END)",
    TAG_BRANCH);
  }
  blob_append_sql(&sql,
    "  FROM mlink, event"
    " WHERE mlink.fnid=%d"
    "   AND event.objid=mlink.mid",
    fnid
  );
  if( baseCheckin ){
    compute_direct_ancestors(baseCheckin, 10000000);
    blob_append_sql(&sql,"  AND mlink.mid IN (SELECT rid FROM ancestor)");
  }
  if( (zA = P("a"))!=0 ){
    blob_append_sql(&sql, " AND event.mtime>=julianday('%q')", zA);
    url_add_parameter(&url, "a", zA);
  }
  if( (zB = P("b"))!=0 ){
    blob_append_sql(&sql, " AND event.mtime<=julianday('%q')", zB);
    url_add_parameter(&url, "b", zB);
  }
  if( firstChngOnly ){
    blob_append_sql(&sql, " GROUP BY mlink.fid");
  }

  blob_append_sql(&sql," ORDER BY event.mtime DESC /*sort*/");

  if( (n = atoi(PD("n","0")))>0 ){
    blob_append_sql(&sql, " LIMIT %d", n);
    url_add_parameter(&url, "n", P("n"));
  }
  if( baseCheckin==0 ){
    if( firstChngOnly ){
      style_submenu_element("Full", "Show all changes","%s",
                            url_render(&url, "fco", "0", 0, 0));
    }else{
      style_submenu_element("Simplified",
                            "Show only first use of a change","%s",
                            url_render(&url, "fco", 0, 0, 0));
    }
  }
  db_prepare(&q, "%s", blob_sql_text(&sql));
  if( P("showsql")!=0 ){
    @ <p>SQL: %h(blob_str(&sql))</p>
  }
  blob_reset(&sql);
  blob_zero(&title);
  if( baseCheckin ){