Fix custom embeds in user_playlists; add NEWS.md

Server administrators should check NEWS.md before updating for
information about important changes or required administrator
intervention.

lib/database/update.js

@@ -2,7 +2,7 @@ var db = require("../database");
 var Logger = require("../logger");
 var Q = require("q");
 
-const DB_VERSION = 6;
+const DB_VERSION = 7;
 var hasUpdates = [];
 
 module.exports.checkVersion = function () {
@@ -56,6 +56,8 @@ function update(version, cb) {
         fixUtf8mb4(cb);
     } else if (version < 6) {
         fixCustomEmbeds(cb);
+    } else if (version < 7) {
+        fixCustomEmbedsInUserPlaylists(cb);
     }
 }
 
@@ -270,3 +272,61 @@ function fixCustomEmbeds(cb) {
         });
     });
 }
+
+function fixCustomEmbedsInUserPlaylists(cb) {
+    var CustomEmbedFilter = require("../customembed").filter;
+    Q.nfcall(db.query, "SELECT * FROM `user_playlists` WHERE `contents` LIKE '%\"type\":\"cu\"%'")
+        .then(function (rows) {
+            var all = [];
+            rows.forEach(function (row) {
+                var data;
+                try {
+                    data = JSON.parse(row.contents);
+                } catch (e) {
+                    return;
+                }
+
+                var updated = [];
+                var item;
+                while ((item = data.shift()) !== undefined) {
+                    if (item.type !== "cu") {
+                        updated.push(item);
+                        continue;
+                    }
+
+                    if (/^cu:/.test(item.id)) {
+                        updated.push(item);
+                        continue;
+                    }
+
+                    var media;
+                    try {
+                        media = CustomEmbedFilter(item.id);
+                    } catch (e) {
+                        Logger.syslog.log("WARNING: Unable to convert " + item.id);
+                        continue;
+                    }
+
+                    updated.push({
+                        id: media.id,
+                        title: item.title,
+                        seconds: media.seconds,
+                        type: media.type,
+                        meta: {
+                            embed: media.meta.embed
+                        }
+                    });
+
+                    all.push(Q.nfcall(db.query, "UPDATE `user_playlists` SET `contents`=?, `count`=? WHERE `user`=? AND `name`=?",
+                            [JSON.stringify(updated), updated.length, row.user, row.name]));
+                }
+            });
+
+            Q.allSettled(all).then(function () {
+                Logger.syslog.log('Fixed custom embeds in user_playlists');
+                cb();
+            });
+        }).catch(function (err) {
+            Logger.errlog.log(err.stack);
+        });
+}