]> git.wh0rd.org - tt-rss.git/blobdiff - functions.php
replace some theme-specific frontend hooks with theme options
[tt-rss.git] / functions.php
index 41bd646f04040507ac5b72143919c2cb384ce42d..781074569a16b1c325c45f15b9b03b63a52f1308 100644 (file)
 
                if (!$icon_file) $icon_file = getFeedIcon($feed_id);
 
+               if (strpos($icon_file, "images") !== false) {
+                       $icon_file = theme_image($link, $icon_file);
+               }
+
                if (file_exists($icon_file) && filesize($icon_file) > 0) {
                                $feed_icon = "<img id=\"FIMG-$feed_id\" src=\"$icon_file\">";
                } else {
                }
        }
 
-       function initialize_user_prefs($link, $uid) {
+       function initialize_user_prefs($link, $uid, $profile = false) {
 
                $uid = db_escape_string($uid);
 
+               if (!$profile) {
+                       $profile = "NULL";
+                       $profile_qpart = "AND profile IS NULL";
+               } else {
+                       $profile_qpart = "AND profile = '$profile'";
+               }
+
+               if (get_schema_version($link) < 63) $profile_qpart = "";
+
                db_query($link, "BEGIN");
 
                $result = db_query($link, "SELECT pref_name,def_value FROM ttrss_prefs");
                
                $u_result = db_query($link, "SELECT pref_name 
-                       FROM ttrss_user_prefs WHERE owner_uid = '$uid'");
+                       FROM ttrss_user_prefs WHERE owner_uid = '$uid' $profile_qpart");
 
                $active_prefs = array();
 
                        if (array_search($line["pref_name"], $active_prefs) === FALSE) {
 //                             print "adding " . $line["pref_name"] . "<br>";
 
-                               db_query($link, "INSERT INTO ttrss_user_prefs
-                                       (owner_uid,pref_name,value) VALUES 
-                                       ('$uid', '".$line["pref_name"]."','".$line["def_value"]."')");
+                               if (get_schema_version($link) < 63) {
+                                       db_query($link, "INSERT INTO ttrss_user_prefs
+                                               (owner_uid,pref_name,value) VALUES 
+                                               ('$uid', '".$line["pref_name"]."','".$line["def_value"]."')");
+
+                               } else {
+                                       db_query($link, "INSERT INTO ttrss_user_prefs
+                                               (owner_uid,pref_name,value, profile) VALUES 
+                                               ('$uid', '".$line["pref_name"]."','".$line["def_value"]."', $profile)");
+                               }
 
                        }
                }
                                db_query($link, "UPDATE ttrss_users SET last_login = NOW() WHERE id = " . 
                                        $_SESSION["uid"]);
        
-                               $user_theme = get_user_theme_path($link);
-       
-                               $_SESSION["theme"] = $user_theme;
                                $_SESSION["ip_address"] = $_SERVER["REMOTE_ADDR"];
                                $_SESSION["pwd_hash"] = db_fetch_result($result, 0, "pwd_hash");
        
                        $_SESSION["uid"] = 1;
                        $_SESSION["name"] = "admin";
 
-                       $user_theme = get_user_theme_path($link);
-       
-                       $_SESSION["theme"] = $user_theme;
                        $_SESSION["ip_address"] = $_SERVER["REMOTE_ADDR"];
        
                        initialize_user_prefs($link, $_SESSION["uid"]);
                        }
                }
 
+               if ($_SESSION["ref_schema_version"] != get_schema_version($link, true)) {
+                       return false;
+               }
+
                if ($_SESSION["uid"]) {
 
                        $result = db_query($link, 
        function login_sequence($link, $mobile = false) {
                if (!SINGLE_USER_MODE) {
 
-                       if (defined('_DEBUG_USER_SWITCH') && $_SESSION["uid"]) {
-                               $swu = db_escape_string($_REQUEST["swu"]);
-                               if ($swu) {
-                                       $_SESSION["prefs_cache"] = false;
-                                       return authenticate_user($link, $swu, null, true);
-                               }
-                       }
-
                        $login_action = $_POST["login_action"];
 
                        # try to authenticate user if called from login form                    
                                        $_POST["password"] = "";
 
                                        $_SESSION["language"] = $_POST["language"];
+                                       $_SESSION["ref_schema_version"] = get_schema_version($link, true);
                                        $_SESSION["bw_limit"] = !!$_POST["bw_limit"];
 
+                                       if ($_POST["profile"]) {
+
+                                               $profile = db_escape_string($_POST["profile"]);
+
+                                               $result = db_query($link, "SELECT id FROM ttrss_settings_profiles
+                                                       WHERE id = '$profile' AND owner_uid = " . $_SESSION["uid"]);
+
+                                               if (db_num_rows($result) != 0) {
+                                                       $_SESSION["profile"] = $profile;
+                                                       $_SESSION["prefs_cache"] = array();
+                                               }
+                                       }
+
                                        header("Location: " . $_SERVER["REQUEST_URI"]);
                                        exit;
 
                }
        }
 
+       function theme_image($link, $filename) {
+               if ($link) {
+                       $theme_path = get_user_theme_path($link);
+
+                       if ($theme_path && is_file($theme_path.$filename)) {
+                               return $theme_path.$filename;
+                       } else {
+                               return $filename;
+                       }
+               } else {
+                       return $filename;
+               }
+       }
+
+       function get_user_theme($link) {
+
+               if (get_schema_version($link) >= 63) {
+                       $theme_name = get_pref($link, "_THEME_ID");
+                       if (is_dir("themes/$theme_name")) {
+                               return $theme_name;
+                       } else {
+                               return '';
+                       }
+               } else {
+                       return '';
+               }
+
+       }
+
        function get_user_theme_path($link) {
-               $result = db_query($link, "SELECT theme_path 
-                       FROM 
-                               ttrss_themes,ttrss_users
-                       WHERE ttrss_themes.id = theme_id AND ttrss_users.id = " . $_SESSION["uid"]);
-               if (db_num_rows($result) != 0) {
-                       return db_fetch_result($result, 0, "theme_path");
+
+               if (get_schema_version($link) >= 63) {
+                       $theme_name = get_pref($link, "_THEME_ID");
+
+                       if ($theme_name && is_dir("themes/$theme_name")) {
+                               $theme_path = "themes/$theme_name/";
+                       } else {
+                               $theme_name = '';
+                       }
                } else {
-                       return null;
+                       $theme_path = '';
+               }
+
+               return $theme_path;
+       }
+
+       function get_user_theme_options($link) {
+               $t = get_user_theme_path($link);
+
+               if ($t) {
+                       if (is_file("$t/theme.ini")) {
+                               $ini = parse_ini_file("$t/theme.ini", true);
+                               if ($ini['theme']['version']) {
+                                       return $ini['theme']['options'];
+                               }
+                       }
+               }
+               return false;
+       }
+
+
+       function get_all_themes() {
+               $themes = glob("themes/*");
+
+               asort($themes);
+
+               $rv = array();
+
+               foreach ($themes as $t) {
+                       if (is_file("$t/theme.ini")) {
+                               $ini = parse_ini_file("$t/theme.ini", true);
+                               if ($ini['theme']['version'] && !$ini['theme']['disabled']) {
+                                       $entry = array();
+                                       $entry["path"] = $t;
+                                       $entry["base"] = basename($t);
+                                       $entry["name"] = $ini['theme']['name'];
+                                       $entry["version"] = $ini['theme']['version'];
+                                       $entry["author"] = $ini['theme']['author'];
+                                       $entry["options"] = $ini['theme']['options'];
+                                       array_push($rv, $entry);
+                               }
+                       }
                }
+
+               return $rv;
        }
 
        function smart_date_time($timestamp) {
                        return "even";
        }
 
+       function get_schema_version($link, $nocache = false) {
+               if (!$_SESSION["schema_version"] || $nocache) {
+                       $result = db_query($link, "SELECT schema_version FROM ttrss_version");
+                       $version = db_fetch_result($result, 0, "schema_version");
+                       $_SESSION["schema_version"] = $version;
+                       return $version;
+               } else {
+                       return $_SESSION["schema_version"];
+               }
+       }
+
        function sanity_check($link) {
 
                error_reporting(0);
 
                $error_code = 0;
-               $result = db_query($link, "SELECT schema_version FROM ttrss_version");
-               $schema_version = db_fetch_result($result, 0, "schema_version");
+               $schema_version = get_schema_version($link);
 
                if ($schema_version != SCHEMA_VERSION) {
                        $error_code = 5;
                print "</rpc-reply>";
        }
 
-       function subscribe_to_feed($link, $feed_link, $cat_id = 0, 
+       function subscribe_to_feed($link, $url, $cat_id = 0, 
                        $auth_login = '', $auth_pass = '') {
 
-               # check for feed:http://url
-               $feed_link = trim(preg_replace("/^feed:/", "", $feed_link));
+               $parts = parse_url($url);
 
-               # check for feed://URL
-               if (strpos($feed_link, "//") === 0) {
-                       $feed_link = "http:$feed_link";
-               }
+               if (!validate_feed_url($url)) return 2;
 
-               if ($feed_link == "") return;
+               if ($parts['scheme'] == 'feed') $parts['scheme'] = 'http';
+
+               $url = make_url_from_parts($parts);
 
                if ($cat_id == "0" || !$cat_id) {
                        $cat_qpart = "NULL";
        
                $result = db_query($link,
                        "SELECT id FROM ttrss_feeds 
-                       WHERE feed_url = '$feed_link' AND owner_uid = ".$_SESSION["uid"]);
+                       WHERE feed_url = '$url' AND owner_uid = ".$_SESSION["uid"]);
        
                if (db_num_rows($result) == 0) {
                        
                        $result = db_query($link,
                                "INSERT INTO ttrss_feeds 
                                        (owner_uid,feed_url,title,cat_id, auth_login,auth_pass) 
-                               VALUES ('".$_SESSION["uid"]."', '$feed_link', 
+                               VALUES ('".$_SESSION["uid"]."', '$url', 
                                '[Unknown]', $cat_qpart, '$auth_login', '$auth_pass')");
        
                        $result = db_query($link,
-                               "SELECT id FROM ttrss_feeds WHERE feed_url = '$feed_link
+                               "SELECT id FROM ttrss_feeds WHERE feed_url = '$url
                                        AND owner_uid = " . $_SESSION["uid"]);
        
                        $feed_id = db_fetch_result($result, 0, "id");
        
                        if ($feed_id) {
-                               update_rss_feed($link, $feed_link, $feed_id, true);
+                               update_rss_feed($link, $url, $feed_id, true);
                        }
 
-                       return true;
+                       return 1;
                } else {
-                       return false;
+                       return 0;
                }
        }
 
                        return "images/mark_set.png";
                        break;
                case -2:
-                       return "images/pub_set.gif";
+                       return "images/pub_set.png";
                        break;
                case -3:
                        return "images/fresh.png";
                        }
                }
 
-               print "<param key=\"theme\" value=\"".$_SESSION["theme"]."\"/>";
+               print "<param key=\"theme\" value=\"".get_user_theme($link)."\"/>";
+               print "<param key=\"theme_options\" value=\"".get_user_theme_options($link)."\"/>";
                print "<param key=\"daemon_enabled\" value=\"" . ENABLE_UPDATE_DAEMON . "\"/>";
                print "<param key=\"feeds_frame_refresh\" value=\"" . FEEDS_FRAME_REFRESH . "\"/>";
                print "<param key=\"daemon_refresh_only\" value=\"true\"/>";
 
+               print "<param key=\"sign_progress\" value=\"".
+                       theme_image($link, "images/indicator_white.gif")."\"/>";
+
+               print "<param key=\"sign_progress_tiny\" value=\"".
+                       theme_image($link, "images/indicator_tiny.gif")."\"/>";
+
+               print "<param key=\"sign_excl\" value=\"".
+                       theme_image($link, "images/sign_excl.png")."\"/>";
+
+               print "<param key=\"sign_info\" value=\"".
+                       theme_image($link, "images/sign_info.png")."\"/>";
+
                print "<param key=\"on_catchup_show_next_feed\" value=\"" . 
                        get_pref($link, "ON_CATCHUP_SHOW_NEXT_FEED") . "\"/>";
 
                }
 
                if (get_pref($link, "STRIP_IMAGES", $owner)) {
-                       
                        $res = preg_replace('/<img[^>]+>/is', '', $res);
+               }
 
+               if (get_pref($link, 'OPEN_LINKS_IN_NEW_WINDOW')) {
+                       $res = preg_replace("/href=/i", "target=\"_blank\" href=", $res);
                }
 
                return $res;
                                print "<li onclick=\"$archive_sel_link\">&nbsp;&nbsp;".__('Archive')."</li>";
                        } else {
                                print "<li onclick=\"$archive_sel_link\">&nbsp;&nbsp;".__('Move back')."</li>";
-                       } 
+                               print "<li onclick=\"$delete_sel_link\">&nbsp;&nbsp;".__('Delete')."</li>";
 
-                       print "<li onclick=\"$delete_sel_link\">&nbsp;&nbsp;".__('Delete')."</li>";
+                       } 
 
                        //print "<li><span class=\"insensitive\">--------</span></li>";
                        print "<li class=\"insensitive\">".__('Assign label:')."</li>";
        }
 
        function format_warning($msg, $id = "") {
+               global $link;
                return "<div class=\"warning\" id=\"$id\"> 
-                       <img src=\"images/sign_excl.gif\">$msg</div>";
+                       <img src=\"".theme_image($link, "images/sign_excl.png")."\">$msg</div>";
        }
 
        function format_notice($msg) {
-               return "<div class=\"notice\"> 
-                       <img src=\"images/sign_info.gif\">$msg</div>";
+               global $link;
+               return "<div class=\"notice\" id=\"$id\"> 
+                       <img src=\"".theme_image($link, "images/sign_info.png")."\">$msg</div>";
        }
 
        function format_error($msg) {
-               return "<div class=\"error\"> 
-                       <img src=\"images/sign_excl.gif\">$msg</div>";
+               global $link;
+               return "<div class=\"error\" id=\"$id\"> 
+                       <img src=\"".theme_image($link, "images/sign_excl.png")."\">$msg</div>";
        }
 
        function print_notice($msg) {
 
                if ($result) {
 
-                       $link_target = "";
-
-                       if (get_pref($link, 'OPEN_LINKS_IN_NEW_WINDOW')) {
-                               $link_target = "target=\"_blank\"";
-                       }
-
                        $line = db_fetch_assoc($result);
 
                        if ($line["icon_url"]) {
                                } else {
                                        $comments_url = $line["link"];
                                }
-                               $entry_comments = "<a $link_target href=\"$comments_url\">$num_comments comments</a>";
+                               $entry_comments = "<a target='_blank' href=\"$comments_url\">$num_comments comments</a>";
                        } else {
                                if ($line["comments"] && $line["link"] != $line["comments"]) {
-                                       $entry_comments = "<a $link_target href=\"".$line["comments"]."\">comments</a>";
+                                       $entry_comments = "<a target='_blank' href=\"".$line["comments"]."\">comments</a>";
                                }                               
                        }
 
                        print "<div class=\"postDate$rtl_class\">$parsed_updated</div>";
 
                        if ($line["link"]) {
-                               print "<div clear='both'><a $link_target href=\"" . $line["link"] . "\">" . 
+                               print "<div clear='both'><a target='_blank' href=\"" . $line["link"] . "\">" . 
                                        $line["title"] . "</a><span class='author'>$entry_author</span></div>";
                        } else {
                                print "<div clear='both'>" . $line["title"] . "$entry_author</div>";
                        if (!$entry_comments) $entry_comments = "&nbsp;"; # placeholder
 
                        print "<div style='float : right'>
-                                       <img src='images/tag.png' class='tagsPic' alt='Tags' title='Tags'>&nbsp;";
+                               <img src='".theme_image($link, 'images/tag.png')."' 
+                               class='tagsPic' alt='Tags' title='Tags'>&nbsp;";
 
                        if (!$zoom_mode) {
                                print "<span id=\"ATSTR-$id\">$tags_str</span>
                                        <a title=\"".__('Edit tags for this article')."\" 
                                        href=\"javascript:editArticleTags($id, $feed_id)\">(+)</a>";
 
-                               if (defined('_ENABLE_INLINE_VIEW')) {
-
-                                       print "<img src=\"images/art-inline.png\" class='tagsPic' 
-                                                       style=\"cursor : pointer\" style=\"cursor : pointer\"
-                                                       onclick=\"showOriginalArticleInline($id)\"
-                                                       alt='Inline' title='".__('Display original article content')."'>";
-
-                               }
-
-                               print "<img src=\"images/art-zoom.png\" class='tagsPic' 
-                                               style=\"cursor : pointer\" style=\"cursor : pointer\"
+                               print "<img src=\"".theme_image($link, 'images/art-zoom.png')."\" 
+                                               class='tagsPic' style=\"cursor : pointer\" style=\"cursor : pointer\"
                                                onclick=\"zoomToArticle($id)\"
                                                alt='Zoom' title='".__('Show article summary in new window')."'>";
 
                                $note_escaped = htmlspecialchars($line['note'], ENT_QUOTES);
 
-                               print "<img src=\"images/art-pub-note.png\" class='tagsPic' 
-                                               style=\"cursor : pointer\" style=\"cursor : pointer\"
+                               print "<img src=\"".theme_image($link, 'images/art-pub-note.png')."\" 
+                                               class='tagsPic' style=\"cursor : pointer\" style=\"cursor : pointer\"
                                                onclick=\"publishWithNote($id, '$note_escaped')\"
                                                alt='PubNote' title='".__('Publish article with a note')."'>";
 
 
                        $article_content = sanitize_rss($link, $line["content"]);
 
-                       if (get_pref($link, 'OPEN_LINKS_IN_NEW_WINDOW')) {
-                               $article_content = preg_replace("/href=/i", "target=\"_blank\" href=", 
-                                       $article_content);
-                       }
-
                        print "<div id=\"POSTNOTE-$id\">";
                                if ($line['note']) {
                                        print format_article_note($id, $line['note']);
                } else {
                        print "
                                <div style=\"text-align : center\">
-                               <input type=\"submit\" onclick=\"return window.close()\" 
-                               value=\"".__("Close this window")."\"></div>";
+                               <button onclick=\"return window.close()\">".
+                                       __("Close this window")."</button></div>";
                        print "</body></html>";
 
                }
 
                                if ($line["last_read"] == "" && !sql_bool_to_bool($line["unread"])) {
        
-                                       $update_pic = "<img id='FUPDPIC-$id' src=\"images/updated.png\" 
+                                       $update_pic = "<img id='FUPDPIC-$id' src=\"".
+                                               theme_image($link, 'images/updated.png')."\" 
                                                alt=\"Updated\">";
                                } else {
                                        $update_pic = "<img id='FUPDPIC-$id' src=\"images/blank_icon.gif\" 
                                if (sql_bool_to_bool($line["unread"]) && 
                                        time() - strtotime($line["updated_noms"]) < $fresh_intl) {
 
-                                       $update_pic = "<img id='FUPDPIC-$id' src=\"images/fresh_sign.png\" 
-                                                       alt=\"Fresh\">";
+                                       $update_pic = "<img id='FUPDPIC-$id' src=\"".
+                                               theme_image($link, 'images/fresh_sign.png')."\" alt=\"Fresh\">";
                                }
        
                                if ($line["unread"] == "t" || $line["unread"] == "1") {
                                }
 
                                if ($line["marked"] == "t" || $line["marked"] == "1") {
-                                       $marked_pic = "<img id=\"FMPIC-$id\" src=\"images/mark_set.png\" 
-                                               class=\"markedPic\"
-                                               alt=\"Unstar article\" onclick='javascript:tMark($id)'>";
+                                       $marked_pic = "<img id=\"FMPIC-$id\" 
+                                               src=\"".theme_image($link, 'images/mark_set.png')."\" 
+                                               class=\"markedPic\" alt=\"Unstar article\" 
+                                               onclick='javascript:tMark($id)'>";
                                } else {
-                                       $marked_pic = "<img id=\"FMPIC-$id\" src=\"images/mark_unset.png\" 
-                                               class=\"markedPic\"
-                                               alt=\"Star article\" onclick='javascript:tMark($id)'>";
+                                       $marked_pic = "<img id=\"FMPIC-$id\" 
+                                               src=\"".theme_image($link, 'images/mark_unset.png')."\" 
+                                               class=\"markedPic\" alt=\"Star article\" 
+                                               onclick='javascript:tMark($id)'>";
                                }
 
                                if ($line["published"] == "t" || $line["published"] == "1") {
-                                       $published_pic = "<img id=\"FPPIC-$id\" src=\"images/pub_set.gif\" 
+                                       $published_pic = "<img id=\"FPPIC-$id\" src=\"".theme_image($link, 
+                                               'images/pub_set.png')."\" 
                                                class=\"markedPic\"
                                                alt=\"Unpublish article\" onclick='javascript:tPub($id)'>";
                                } else {
-                                       $published_pic = "<img id=\"FPPIC-$id\" src=\"images/pub_unset.gif\" 
+                                       $published_pic = "<img id=\"FPPIC-$id\" src=\"".theme_image($link,
+                                               'images/pub_unset.png')."\" 
                                                class=\"markedPic\"
                                                alt=\"Publish article\" onclick='javascript:tPub($id)'>";
                                }
 
                                $score = $line["score"];
 
-                               $score_pic = get_score_pic($score);
+                               $score_pic = theme_image($link, 
+                                       "images/" . get_score_pic($score));
 
 /*                             $score_title = __("(Click to change)");
                                $score_pic = "<img class='hlScorePic' src=\"images/$score_pic\" 
                                        onclick=\"adjustArticleScore($id, $score)\" title=\"$score $score_title\">"; */
 
-                               $score_pic = "<img class='hlScorePic' src=\"images/$score_pic\" 
+                               $score_pic = "<img class='hlScorePic' src=\"$score_pic\" 
                                        title=\"$score\">";
 
                                if ($score > 500) {
 
                                        print "</span></div>";
 
-                                       if (get_pref($link, 'OPEN_LINKS_IN_NEW_WINDOW')) {
-                                               $line["content_preview"] = preg_replace("/href=/i", 
-                                                       "target=\"_blank\" href=", $line["content_preview"]);
-                                       }
-
                                        if ($show_excerpt) {
                                                print "<div class=\"cdmExcerpt\" id=\"CEXC-$id\"
                                                        onclick=\"cdmExpandArticle($id)\"
 
                                        $tags_str = format_tags_string(get_article_tags($link, $id), $id);
 
-//                                     print "<img src='images/tag.png' class='markedPic'>";
-
                                        print "<span class='s1'>
-                                               <img class='tagsPic' src='images/tag.png' alt='Tags' title='Tags'>
+                                               <img class='tagsPic' src='".theme_image($link,
+                                                       'images/tag.png')."' alt='Tags' title='Tags'>
                                                <span id=\"ATSTR-$id\">$tags_str</span>
                                                <a title=\"".__('Edit tags for this article')."\" 
                                                href=\"javascript:editArticleTags($id, $feed_id, true)\">(+)</a>";
                }
 
                $url_path .= $_SERVER['HTTP_HOST'].dirname($_SERVER['PHP_SELF']);
-               $url_path .= "/backend.php?op=publish&key=" . get_pref($link, "_PREFS_PUBLISH_KEY");
+               $url_path .= "/backend.php?op=publish&key=" . 
+                       get_pref($link, "_PREFS_PUBLISH_KEY", $_SESSION["uid"]);
 
                return $url_path;
        }
                if ($score > 100) { 
                        return "score_high.png"; 
                } else if ($score > 0) { 
-                       return "score_half_high.png"; 
+                       return "score_half_high.png";
                } else if ($score < -100) {
-                       return "score_low.png"; 
+                       return "score_low.png";
                } else if ($score < 0) {
-                       return "score_half_low.png"; 
+                       return "score_half_low.png";
                } else { 
-                       return "score_neutral.png"; 
+                       return "score_neutral.png";
                }
        }
 
 
                $num_tags = 0;
 
-               if ($_SESSION["theme"] == "3pane") {
+/*             if (get_user_theme($link) == "3pane") {
                        $tag_limit = 3;
                } else {
                        $tag_limit = 6;
-               }
+               } */
+
+               $tag_limit = 6;
 
                $formatted_tags = array();
 
 
                        db_query($link, "COMMIT");
 
-                       if (file_exists(ICONS_DIR . "/$id.ico")) {
+/*                     if (file_exists(ICONS_DIR . "/$id.ico")) {
                                unlink(ICONS_DIR . "/$id.ico");
-                       }
+                       } */
 
                        ccache_remove($link, $id, $owner_uid);
 
                        return 0;
                }
        }
+
+       function make_url_from_parts($parts) {
+               $url = $parts['scheme'] . '://' . $parts['host'];
+
+               if ($parts['path']) $url .= $parts['path'];
+               if ($parts['query']) $url .= '?' . $parts['query'];
+
+               return $url;
+       }
+
+       function validate_feed_url($url) {
+               $parts = parse_url($url);
+
+               return ($parts['scheme'] == 'http' || $parts['scheme'] == 'feed' || $parts['scheme'] == 'https');
+
+       }
+
 ?>