Continue working on banned channels

bin/admin.js

@@ -49,8 +49,11 @@ let commands = [
             let [name, externalReason, internalReason] = args;
             let answer = await rl.question(`Ban ${name} with external reason "${externalReason}" and internal reason "${internalReason}"? `);
 
+            if (!/^[yY]$/.test(answer)) {
+                console.log('Aborted.');
+                process.exit(1);
+            }
 
-            if (/^[yY]$/.test(answer)) {
             let res = await doCommand({
                 command: 'ban-channel',
                 name,
@@ -58,15 +61,95 @@ let commands = [
                 internalReason
             });
 
-                console.log(`Status: ${res.status}`);
-                if (res.status === 'error') {
+            switch (res.status) {
+                case 'error':
                     console.log('Error:', res.error);
                     process.exit(1);
-                } else {
+                    break;
+                case 'success':
+                    console.log('Ban succeeded.');
                     process.exit(0);
+                    break;
+                default:
+                    console.log(`Unknown result: ${res.status}`);
+                    process.exit(1);
+                    break;
             }
-            } else {
+        }
+    },
+    {
+        command: 'unban-channel',
+        handler: async args => {
+            if (args.length !== 1) {
+                console.log('Usage: unban-channel <name>');
+                process.exit(1);
+            }
+
+            let [name] = args;
+            let answer = await rl.question(`Unban ${name}? `);
+
+            if (!/^[yY]$/.test(answer)) {
                 console.log('Aborted.');
+                process.exit(1);
+            }
+
+            let res = await doCommand({
+                command: 'unban-channel',
+                name
+            });
+
+            switch (res.status) {
+                case 'error':
+                    console.log('Error:', res.error);
+                    process.exit(1);
+                    break;
+                case 'success':
+                    console.log('Unban succeeded.');
+                    process.exit(0);
+                    break;
+                default:
+                    console.log(`Unknown result: ${res.status}`);
+                    process.exit(1);
+                    break;
+            }
+        }
+    },
+    {
+        command: 'show-banned-channel',
+        handler: async args => {
+            if (args.length !== 1) {
+                console.log('Usage: show-banned-channel <name>');
+                process.exit(1);
+            }
+
+            let [name] = args;
+
+            let res = await doCommand({
+                command: 'show-banned-channel',
+                name
+            });
+
+            switch (res.status) {
+                case 'error':
+                    console.log('Error:', res.error);
+                    process.exit(1);
+                    break;
+                case 'success':
+                    if (res.ban != null) {
+                            console.log(`Channel: ${name}`);
+                        console.log(`Ban issued: ${res.ban.createdAt}`);
+                        console.log(`Banned by: ${res.ban.bannedBy}`);
+                        console.log(`External reason:\n${res.ban.externalReason}`);
+                        console.log(`Internal reason:\n${res.ban.internalReason}`);
+                    } else {
+                        console.log(`Channel ${name} is not banned.`);
+                    }
+                    process.exit(0);
+                    break;
+                default:
+                    console.log(`Unknown result: ${res.status}`);
+                    process.exit(1);
+                    break;
             }
         }
     }

src/cli/banned-channels.js

@@ -10,3 +10,15 @@ export async function handleBanChannel({ name, externalReason, internalReason })
 
     return { status: 'success' };
 }
+
+export async function handleUnbanChannel({ name }) {
+    await Server.getServer().bannedChannelsController.unbanChannel(name, '[console]');
+
+    return { status: 'success' };
+}
+
+export async function handleShowBannedChannel({ name }) {
+    let banInfo = await Server.getServer().bannedChannelsController.getBannedChannel(name);
+
+    return { status: 'success', ban: banInfo };
+}

src/config.js

@@ -66,7 +66,6 @@ var defaults = {
         }
     },
     "youtube-v3-key": "",
-    "channel-blacklist": [],
     "channel-path": "r",
     "channel-save-interval": 5,
     "max-channels-per-user": 5,
@@ -372,13 +371,6 @@ function preprocessConfig(cfg) {
         }
     }
 
-    /* Convert channel blacklist to a hashtable */
-    var tbl = {};
-    cfg["channel-blacklist"].forEach(function (c) {
-        tbl[c.toLowerCase()] = true;
-    });
-    cfg["channel-blacklist"] = tbl;
-
     /* Check channel path */
     if(!/^[-\w]+$/.test(cfg["channel-path"])){
         LOGGER.error("Channel paths may only use the same characters as usernames and channel names.");

src/controller/banned-channels.js

@@ -1,3 +1,4 @@
+import { eventlog } from '../logger';
 const LOGGER = require('@calzoneman/jsli')('BannedChannelsController');
 
 export class BannedChannelsController {
@@ -6,8 +7,13 @@ export class BannedChannelsController {
         this.globalMessageBus = globalMessageBus;
     }
 
+    /*
+     * TODO: add an audit log to the database
+     */
+
     async banChannel({ name, externalReason, internalReason, bannedBy }) {
         LOGGER.info(`Banning channel ${name} (banned by ${bannedBy})`);
+        eventlog.log(`[acp] ${bannedBy} banned channel ${name}`);
 
         let banInfo = await this.dbChannels.getBannedChannel(name);
         if (banInfo !== null) {
@@ -26,4 +32,61 @@ export class BannedChannelsController {
             { channel: name, externalReason }
         );
     }
+
+    async unbanChannel(name, unbannedBy) {
+        LOGGER.info(`Unbanning channel ${name}`);
+        eventlog.log(`[acp] ${unbannedBy} unbanned channel ${name}`);
+
+        this.globalMessageBus.emit(
+            'ChannelUnbanned',
+            { channel: name }
+        );
+
+        await this.dbChannels.removeBannedChannel(name);
+    }
+
+    async getBannedChannel(name) {
+        // TODO: cache
+        return this.dbChannels.getBannedChannel(name);
+    }
+}
+
+class Cache {
+    constructor({ maxElem, maxAge }) {
+        this.maxElem = maxElem;
+        this.maxAge = maxAge;
+        this.cache = new Map();
+    }
+
+    put(key, value) {
+        this.cache.set(key, { value: value, at: Date.now() });
+
+        if (this.cache.size > this.maxElem) {
+            this.cache.delete(this.cache.keys().next());
+        }
+    }
+
+    get(key) {
+        let val = this.cache.get(key);
+
+        if (val != null) {
+            return val.value;
+        } else {
+            return null;
+        }
+    }
+
+    delete(key) {
+        this.cache.delete(key);
+    }
+
+    cleanup() {
+        let now = Date.now();
+
+        for (let [key, value] of this.cache) {
+            if (value.at < now - this.maxAge) {
+                this.cache.delete(key);
+            }
+        }
+    }
 }

src/database/channels.js

@@ -763,10 +763,22 @@ module.exports = {
                     banned_by: bannedBy
                 });
             let update = tx.raw(createMySQLDuplicateKeyUpdate(
-                ['external_reason', 'internal_reason']
+                ['external_reason', 'internal_reason', 'banned_by']
             ));
 
             return tx.raw(insert.toString() + update.toString());
         });
+    },
+
+    removeBannedChannel: async function removeBannedChannel(name) {
+        if (!valid(name)) {
+            throw new Error("Invalid channel name");
+        }
+
+        return await db.getDB().runTransaction(async tx => {
+            await tx.table('banned_channels')
+                .where({ channel_name: name })
+                .delete();
+        });
     }
 };

src/main.js

@@ -33,7 +33,11 @@ async function handleCliCmd(cmd) {
     try {
         switch (cmd.command) {
             case 'ban-channel':
-                return await bannedChannels.handleBanChannel(cmd);
+                return bannedChannels.handleBanChannel(cmd);
+            case 'unban-channel':
+                return bannedChannels.handleUnbanChannel(cmd);
+            case 'show-banned-channel':
+                return bannedChannels.handleShowBannedChannel(cmd);
             default:
                 throw new Error(`Unrecognized command "${cmd.command}"`);
         }
@@ -52,6 +56,7 @@ function handleLine(line, client) {
             client.write(JSON.stringify(res) + '\n');
         }).catch(error => {
             LOGGER.error(`Unexpected error in handleCliCmd: ${error.stack}`);
+            client.write('{"status":"error","error":"internal error"}\n');
         });
     } catch (_error) {
     }

src/user.js

@@ -76,10 +76,6 @@ User.prototype.handleJoinChannel = function handleJoinChannel(data) {
     }
 
     data.name = data.name.toLowerCase();
-    if (data.name in Config.get("channel-blacklist")) {
-        this.kick("This channel is blacklisted.");
-        return;
-    }
 
     this.waitFlag(Flags.U_READY, () => {
         var chan;

src/web/webserver.js

@@ -198,8 +198,8 @@ module.exports = {
             app,
             ioConfig,
             chanPath,
-            async name => null
-            /*require('../database/channels').getBannedChannel*/
+            // TODO: banController
+            require('../database/channels').getBannedChannel
         );
         require('./routes/index')(app, channelIndex, webConfig.getMaxIndexEntries());
         require('./routes/socketconfig')(app, clusterClient);