dist/server/friends.js.map

{
  "version": 3,
  "sources": ["../../server/friends.ts"],
  "sourcesContent": ["/**\n * Friends chat-plugin database handler.\n * @author mia-pi-git\n */\n// eslint-disable-next-line @typescript-eslint/ban-ts-comment\n// @ts-ignore in case it isn't installed\nimport type * as Database from 'better-sqlite3';\nimport { Utils, FS, ProcessManager, Repl } from '../lib';\nimport { Config } from './config-loader';\nimport * as path from 'path';\n\n/** Max friends per user */\nexport const MAX_FRIENDS = 100;\n/** Max friend requests. */\nexport const MAX_REQUESTS = 6;\nexport const DEFAULT_FILE = FS('databases/friends.db').path;\nconst REQUEST_EXPIRY_TIME = 30 * 24 * 60 * 60 * 1000;\nconst PM_TIMEOUT = 30 * 60 * 1000;\n\nexport interface DatabaseRequest {\n\tstatement: string;\n\ttype: 'all' | 'get' | 'run' | 'transaction';\n\tdata: AnyObject | any[];\n}\n\nexport interface DatabaseResult {\n\t/** Specify this to return an error message to the user */\n\terror?: string;\n\tresult?: any;\n}\n\nexport interface Friend {\n\t/** Always the same as Friend#friend. Use whichever you want. */\n\tuserid: ID;\n\t/** Always the same as Friend#userid. Use whichever you want. */\n\tfriend: ID;\n\tsend_login_data: number;\n\tlast_login: number;\n\tpublic_list: number;\n\tallowing_login: number;\n}\n\n/** Like Chat.ErrorMessage, but made for the subprocess so we can throw errors to the user not using errorMessage\n * because errorMessage crashes when imported (plus we have to spawn dex, etc, all unnecessary - this is easier)\n */\nexport class FailureMessage extends Error {\n\tconstructor(message: string) {\n\t\tsuper(message);\n\t\tthis.name = 'FailureMessage';\n\t\tError.captureStackTrace(this, FailureMessage);\n\t}\n}\n\nexport function sendPM(message: string, to: string, from = '~') {\n\tconst senderID = toID(from);\n\tconst receiverID = toID(to);\n\tconst sendingUser = Users.get(senderID);\n\tconst receivingUser = Users.get(receiverID);\n\tconst fromIdentity = sendingUser ? sendingUser.getIdentity() : ` ${senderID}`;\n\tconst toIdentity = receivingUser ? receivingUser.getIdentity() : ` ${receiverID}`;\n\n\tif (from === '~') {\n\t\treturn receivingUser?.send(`|pm|~|${toIdentity}|${message}`);\n\t}\n\treceivingUser?.send(`|pm|${fromIdentity}|${toIdentity}|${message}`);\n}\n\nfunction canPM(sender: User, receiver: User | null) {\n\tif (!receiver?.settings.blockPMs) return true;\n\tif (receiver.settings.blockPMs === true) return sender.can('lock');\n\tif (receiver.settings.blockPMs === 'friends') return false;\n\treturn Users.globalAuth.atLeast(sender, receiver.settings.blockPMs);\n}\n\nexport class FriendsDatabase {\n\tfile: string;\n\tconstructor(file: string = DEFAULT_FILE) {\n\t\tthis.file = file === ':memory:' ? file : path.resolve(file);\n\t}\n\tasync updateUserCache(user: User) {\n\t\tuser.friends = new Set(); // we clear to account for users who may have been deleted\n\t\tconst friends = await this.getFriends(user.id);\n\t\tfor (const friend of friends) {\n\t\t\tuser.friends.add(friend.userid);\n\t\t}\n\t\treturn user.friends;\n\t}\n\tstatic setupDatabase(fileName?: string) {\n\t\tconst file = fileName || process.env.filename || DEFAULT_FILE;\n\t\tconst exists = FS(file).existsSync() || file === ':memory:';\n\t\tconst database: Database.Database = new (require('better-sqlite3'))(file);\n\t\tif (!exists) {\n\t\t\tdatabase.exec(FS('databases/schemas/friends.sql').readSync());\n\t\t} else {\n\t\t\tlet val;\n\t\t\ttry {\n\t\t\t\tval = (database\n\t\t\t\t\t.prepare(`SELECT val FROM database_settings WHERE name = 'version'`)\n\t\t\t\t\t.get() as AnyObject).val;\n\t\t\t} catch {}\n\t\t\tconst actualVersion = FS(`databases/migrations/friends`).readdirIfExistsSync().length;\n\t\t\tif (val === undefined) {\n\t\t\t\t// hasn't been set up before, write new version.\n\t\t\t\tdatabase.exec(FS('databases/schemas/friends.sql').readSync());\n\t\t\t}\n\t\t\tif (typeof val === 'number' && val !== actualVersion) {\n\t\t\t\tthrow new Error(`Friends DB is out of date, please migrate to latest version.`);\n\t\t\t}\n\t\t}\n\t\tdatabase.exec(FS(`databases/schemas/friends-startup.sql`).readSync());\n\n\t\tfor (const k in FUNCTIONS) {\n\t\t\tdatabase.function(k, FUNCTIONS[k]);\n\t\t}\n\n\t\tfor (const k in ACTIONS) {\n\t\t\ttry {\n\t\t\t\tstatements[k] = database.prepare(ACTIONS[k as keyof typeof ACTIONS]);\n\t\t\t} catch (e: any) {\n\t\t\t\tthrow new Error(`Friends DB statement crashed: ${ACTIONS[k as keyof typeof ACTIONS]} (${e.message})`);\n\t\t\t}\n\t\t}\n\n\t\tfor (const k in TRANSACTIONS) {\n\t\t\ttransactions[k] = database.transaction(TRANSACTIONS[k]);\n\t\t}\n\n\t\tstatements.expire.run();\n\t\treturn { database, statements };\n\t}\n\tasync getFriends(userid: ID): Promise<Friend[]> {\n\t\treturn (await this.all('get', [userid, MAX_FRIENDS])) || [];\n\t}\n\tasync getRequests(user: User) {\n\t\tconst sent = new Set<string>();\n\t\tconst received = new Set<string>();\n\t\tif (user.settings.blockFriendRequests) {\n\t\t\t// delete any pending requests that may have been sent to them while offline\n\t\t\t// we used to return but we will not since you can send requests while blocking\n\t\t\tawait this.run('deleteReceivedRequests', [user.id]);\n\t\t}\n\t\tconst sentResults = await this.all('getSent', [user.id]);\n\t\tif (sentResults === null) return { sent, received };\n\t\tfor (const request of sentResults) {\n\t\t\tsent.add(request.receiver);\n\t\t}\n\t\tconst receivedResults = await this.all('getReceived', [user.id]) || [];\n\t\tif (!receivedResults) {\n\t\t\treturn { received, sent };\n\t\t}\n\t\tfor (const request of receivedResults) {\n\t\t\treceived.add(request.sender);\n\t\t}\n\t\treturn { sent, received };\n\t}\n\tall(statement: string, data: any[] | AnyObject): Promise<any[] | null> {\n\t\treturn this.query({ type: 'all', data, statement });\n\t}\n\ttransaction(statement: string, data: any[] | AnyObject): Promise<{ result: any } | null> {\n\t\treturn this.query({ data, statement, type: 'transaction' });\n\t}\n\trun(statement: string, data: any[] | AnyObject): Promise<{ changes: number, lastInsertRowid: number }> {\n\t\treturn this.query({ statement, data, type: 'run' });\n\t}\n\tget(statement: string, data: any[] | AnyObject): Promise<AnyObject | null> {\n\t\treturn this.query({ statement, data, type: 'get' });\n\t}\n\tprivate async query(input: DatabaseRequest) {\n\t\tconst process = PM.acquire();\n\t\tif (!process || !Config.usesqlite) {\n\t\t\treturn null;\n\t\t}\n\t\tconst result = await process.query(input);\n\t\tif (result.error) {\n\t\t\tthrow new Chat.ErrorMessage(result.error);\n\t\t}\n\t\treturn result.result;\n\t}\n\tasync request(user: User, receiverID: ID) {\n\t\tconst receiver = Users.getExact(receiverID);\n\t\tif (receiverID === user.id || receiver?.previousIDs.includes(user.id)) {\n\t\t\tthrow new Chat.ErrorMessage(`You can't friend yourself.`);\n\t\t}\n\t\tif (receiver?.settings.blockFriendRequests) {\n\t\t\tthrow new Chat.ErrorMessage(`${receiver.name} is blocking friend requests.`);\n\t\t}\n\t\tlet buf = Utils.html`/uhtml sent-${user.id},<button class=\"button\" name=\"send\" value=\"/friends accept ${user.id}\">Accept</button> | `;\n\t\tbuf += Utils.html`<button class=\"button\" name=\"send\" value=\"/friends reject ${user.id}\">Deny</button><br /> `;\n\t\tbuf += `<small>(You can also stop this user from sending you friend requests with <code>/ignore</code>)</small>`;\n\t\tconst disclaimer = (\n\t\t\t`/raw <small>Note: If this request is accepted, your friend will be notified when you come online, ` +\n\t\t\t`and you will be notified when they do, unless you opt out of receiving them.</small>`\n\t\t);\n\t\tif (receiver?.settings.blockFriendRequests) {\n\t\t\tthrow new Chat.ErrorMessage(`This user is blocking friend requests.`);\n\t\t}\n\t\tif (!canPM(user, receiver)) {\n\t\t\tthrow new Chat.ErrorMessage(`This user is blocking PMs, and cannot be friended right now.`);\n\t\t}\n\n\t\tconst result = await this.transaction('send', [user.id, receiverID]);\n\t\tif (receiver) {\n\t\t\tsendPM(`/raw <span class=\"username\">${user.name}</span> sent you a friend request!`, receiver.id, user.id);\n\t\t\tsendPM(buf, receiver.id, user.id);\n\t\t\tsendPM(disclaimer, receiver.id, user.id);\n\t\t}\n\t\tsendPM(\n\t\t\t`/nonotify You sent a friend request to ${receiver?.connected ? receiver.name : receiverID}!`,\n\t\t\tuser.name\n\t\t);\n\t\tsendPM(\n\t\t\t`/uhtml undo-${receiverID},<button class=\"button\" name=\"send\" value=\"/friends undorequest ${Utils.escapeHTML(receiverID)}\">` +\n\t\t\t`<i class=\"fa fa-undo\"></i> Undo</button>`, user.name\n\t\t);\n\t\tsendPM(disclaimer, user.id);\n\t\treturn result;\n\t}\n\tasync removeRequest(receiverID: ID, senderID: ID) {\n\t\tif (!senderID) throw new Chat.ErrorMessage(`Invalid sender username.`);\n\t\tif (!receiverID) throw new Chat.ErrorMessage(`Invalid receiver username.`);\n\n\t\treturn this.run('deleteRequest', [senderID, receiverID]);\n\t}\n\tasync approveRequest(receiverID: ID, senderID: ID) {\n\t\treturn this.transaction('accept', [senderID, receiverID]);\n\t}\n\tasync removeFriend(userid: ID, friendID: ID) {\n\t\tif (!friendID || !userid) throw new Chat.ErrorMessage(`Invalid usernames supplied.`);\n\n\t\tconst result = await this.run('delete', { user1: userid, user2: friendID });\n\t\tif (result.changes < 1) {\n\t\t\tthrow new Chat.ErrorMessage(`You do not have ${friendID} friended.`);\n\t\t}\n\t}\n\twriteLogin(user: ID) {\n\t\treturn this.run('login', [user, Date.now(), Date.now()]);\n\t}\n\thideLoginData(id: ID) {\n\t\treturn this.run('hideLogin', [id, Date.now()]);\n\t}\n\tallowLoginData(id: ID) {\n\t\treturn this.run('showLogin', [id]);\n\t}\n\tasync getLastLogin(userid: ID) {\n\t\tconst result = await this.get('checkLastLogin', [userid]);\n\t\treturn parseInt(result?.['last_login']) || null;\n\t}\n\tasync getSettings(userid: ID) {\n\t\treturn (await this.get('getSettings', [userid])) || {};\n\t}\n\tsetHideList(userid: ID, setting: boolean) {\n\t\tconst num = setting ? 1 : 0;\n\t\t// name, send_login_data, last_login, public_list\n\t\treturn this.run('toggleList', [userid, num, num]);\n\t}\n\tasync findFriendship(user1: string, user2: string): Promise<boolean> {\n\t\tuser1 = toID(user1);\n\t\tuser2 = toID(user2);\n\t\treturn !!(await this.get('findFriendship', { user1, user2 }))?.length;\n\t}\n}\n\nconst statements: { [k: string]: Database.Statement } = {};\nconst transactions: { [k: string]: Database.Transaction } = {};\n\nconst ACTIONS = {\n\tadd: (\n\t\t`REPLACE INTO friends (user1, user2) VALUES ($user1, $user2) ON CONFLICT (user1, user2) ` +\n\t\t`DO UPDATE SET user1 = $user1, user2 = $user2`\n\t),\n\tget: (\n\t\t`SELECT * FROM friends_simplified f LEFT JOIN friend_settings fs ON f.friend = fs.userid WHERE f.userid = ? LIMIT ?`\n\t),\n\tdelete: `DELETE FROM friends WHERE (user1 = $user1 AND user2 = $user2) OR (user1 = $user2 AND user2 = $user1)`,\n\tgetSent: `SELECT receiver, sender FROM friend_requests WHERE sender = ?`,\n\tgetReceived: `SELECT receiver, sender FROM friend_requests WHERE receiver = ?`,\n\tinsertRequest: `INSERT INTO friend_requests(sender, receiver, sent_at) VALUES (?, ?, ?)`,\n\tdeleteRequest: `DELETE FROM friend_requests WHERE sender = ? AND receiver = ?`,\n\tdeleteReceivedRequests: `DELETE FROM friend_requests WHERE receiver = ?`,\n\tfindFriendship: `SELECT * FROM friends WHERE (user1 = $user1 AND user2 = $user2) OR (user2 = $user1 AND user1 = $user2)`,\n\tfindRequest: (\n\t\t`SELECT count(*) as num FROM friend_requests WHERE ` +\n\t\t`(sender = $user1 AND receiver = $user2) OR (sender = $user2 AND receiver = $user1)`\n\t),\n\tcountRequests: `SELECT count(*) as num FROM friend_requests WHERE (sender = ? OR receiver = ?)`,\n\tlogin: (\n\t\t`INSERT INTO friend_settings (userid, send_login_data, last_login, public_list) VALUES (?, 0, ?, 0) ` +\n\t\t`ON CONFLICT (userid) DO UPDATE SET last_login = ?`\n\t),\n\tcheckLastLogin: `SELECT last_login FROM friend_settings WHERE userid = ?`,\n\tdeleteLogin: `UPDATE friend_settings SET last_login = 0 WHERE userid = ?`,\n\texpire: (\n\t\t`DELETE FROM friend_requests WHERE EXISTS` +\n\t\t`(SELECT sent_at FROM friend_requests WHERE should_expire(sent_at) = 1)`\n\t),\n\thideLogin: ( // this works since if the insert works, they have no data, which means no public_list\n\t\t`INSERT INTO friend_settings (userid, send_login_data, last_login, public_list) VALUES (?, 1, ?, 0) ` +\n\t\t`ON CONFLICT (userid) DO UPDATE SET send_login_data = 1`\n\t),\n\tshowLogin: `DELETE FROM friend_settings WHERE userid = ? AND send_login_data = 1`,\n\tcountFriends: `SELECT count(*) as num FROM friends WHERE (user1 = ? OR user2 = ?)`,\n\tgetSettings: `SELECT * FROM friend_settings WHERE userid = ?`,\n\ttoggleList: (\n\t\t`INSERT INTO friend_settings (userid, send_login_data, last_login, public_list) VALUES (?, 0, 0, ?) ` +\n\t\t`ON CONFLICT (userid) DO UPDATE SET public_list = ?`\n\t),\n};\n\nconst FUNCTIONS: { [k: string]: (...input: any[]) => any } = {\n\t'should_expire': (sentTime: number) => {\n\t\tif (Date.now() - sentTime > REQUEST_EXPIRY_TIME) return 1;\n\t\treturn 0;\n\t},\n};\n\nconst TRANSACTIONS: { [k: string]: (input: any[]) => DatabaseResult } = {\n\tsend: requests => {\n\t\tfor (const request of requests) {\n\t\t\tconst [senderID, receiverID] = request;\n\t\t\tconst hasSentRequest = (\n\t\t\t\tstatements.findRequest.get({ user1: senderID, user2: receiverID }) as AnyObject\n\t\t\t)['num'];\n\t\t\tconst friends = (statements.countFriends.get(senderID, senderID) as AnyObject)['num'];\n\t\t\tconst totalRequests = (statements.countRequests.get(senderID, senderID) as AnyObject)['num'];\n\t\t\tif (friends >= MAX_FRIENDS) {\n\t\t\t\tthrow new FailureMessage(`You are at the maximum number of friends.`);\n\t\t\t}\n\t\t\tconst existingFriendship = statements.findFriendship.all({ user1: senderID, user2: receiverID });\n\t\t\tif (existingFriendship.length) {\n\t\t\t\tthrow new FailureMessage(`You are already friends with '${receiverID}'.`);\n\t\t\t}\n\t\t\tif (hasSentRequest) {\n\t\t\t\tthrow new FailureMessage(`You have already sent a friend request to '${receiverID}'.`);\n\t\t\t}\n\t\t\tif (totalRequests >= MAX_REQUESTS) {\n\t\t\t\tthrow new FailureMessage(\n\t\t\t\t\t`You already have ${MAX_REQUESTS} pending friend requests. Use \"/friends view sent\" to see your outgoing requests and \"/friends view receive\" to see your incoming requests.`\n\t\t\t\t);\n\t\t\t}\n\t\t\tstatements.insertRequest.run(senderID, receiverID, Date.now());\n\t\t}\n\t\treturn { result: [] };\n\t},\n\tadd: requests => {\n\t\tfor (const request of requests) {\n\t\t\tconst [senderID, receiverID] = request;\n\t\t\tstatements.add.run({ user1: senderID, user2: receiverID });\n\t\t}\n\t\treturn { result: [] };\n\t},\n\taccept: requests => {\n\t\tfor (const request of requests) {\n\t\t\tconst [senderID, receiverID] = request;\n\t\t\tconst friends = statements.get.all(receiverID, 101);\n\t\t\tif (friends?.length >= MAX_FRIENDS) {\n\t\t\t\tthrow new FailureMessage(`You are at the maximum number of friends.`);\n\t\t\t}\n\t\t\tconst { result } = TRANSACTIONS.removeRequest([request]);\n\t\t\tif (!result.length) throw new FailureMessage(`You have no request pending from ${senderID}.`);\n\t\t\tTRANSACTIONS.add([request]);\n\t\t}\n\t\treturn { result: [] };\n\t},\n\tremoveRequest: requests => {\n\t\tconst result = [];\n\t\tfor (const request of requests) {\n\t\t\tconst [to, from] = request;\n\t\t\tconst { changes } = statements.deleteRequest.run(to, from);\n\t\t\tif (changes) result.push(changes);\n\t\t}\n\t\treturn { result };\n\t},\n};\n\n/**\n * API STUFF - For use in other database child processes that may want to interface with the friends list.\n * todo: should these be under a namespace?\n */\n\n/** Find if a friendship exists between two users. */\nexport function findFriendship(users: [string, string]) {\n\tsetup();\n\treturn !!statements.findFriendship.get({ user1: users[0], user2: users[1] });\n}\n\n// internal for child process api - ensures statements are only set up\nconst setup = () => {\n\tif (!process.send) throw new Error(\"You should not be using this function in the main process\");\n\tif (!Object.keys(statements).length) FriendsDatabase.setupDatabase();\n};\n\n/** Process manager for main process use. */\nexport const PM = new ProcessManager.QueryProcessManager<DatabaseRequest, DatabaseResult>(module, query => {\n\tconst { type, statement, data } = query;\n\tconst start = Date.now();\n\tconst result: DatabaseResult = {};\n\ttry {\n\t\tswitch (type) {\n\t\tcase 'run':\n\t\t\tresult.result = statements[statement].run(data);\n\t\t\tbreak;\n\t\tcase 'get':\n\t\t\tresult.result = statements[statement].get(data);\n\t\t\tbreak;\n\t\tcase 'transaction':\n\t\t\tresult.result = transactions[statement]([data]);\n\t\t\tbreak;\n\t\tcase 'all':\n\t\t\tresult.result = statements[statement].all(data);\n\t\t\tbreak;\n\t\t}\n\t} catch (e: any) {\n\t\tif (!e.name.endsWith('FailureMessage')) {\n\t\t\tresult.error = \"Sorry! The database process crashed. We've been notified and will fix this.\";\n\t\t\tMonitor.crashlog(e, \"A friends database process\", query);\n\t\t} else {\n\t\t\tresult.error = e.message;\n\t\t}\n\t\treturn result;\n\t}\n\tconst delta = Date.now() - start;\n\tif (delta > 1000) {\n\t\tMonitor.slow(`[Slow friends list query] ${JSON.stringify(query)}`);\n\t}\n\treturn result;\n}, PM_TIMEOUT, message => {\n\tif (message.startsWith('SLOW\\n')) {\n\t\tMonitor.slow(message.slice(5));\n\t}\n});\n\nif (require.main === module) {\n\tglobal.Config = (require as any)('./config-loader').Config;\n\tif (Config.usesqlite) {\n\t\tFriendsDatabase.setupDatabase();\n\t}\n\t// since we require this in child processes\n\tif (process.mainModule === module) {\n\t\tglobal.Monitor = {\n\t\t\tcrashlog(error: Error, source = 'A friends database process', details: AnyObject | null = null) {\n\t\t\t\tconst repr = JSON.stringify([error.name, error.message, source, details]);\n\t\t\t\tprocess.send!(`THROW\\n@!!@${repr}\\n${error.stack}`);\n\t\t\t},\n\t\t\tslow(message: string) {\n\t\t\t\tprocess.send!(`CALLBACK\\nSLOW\\n${message}`);\n\t\t\t},\n\t\t} as any;\n\t\tprocess.on('uncaughtException', err => {\n\t\t\tif (Config.crashguard) {\n\t\t\t\tMonitor.crashlog(err, 'A friends child process');\n\t\t\t}\n\t\t});\n\t\t// eslint-disable-next-line no-eval\n\t\tRepl.start(`friends-${process.pid}`, cmd => eval(cmd));\n\t}\n} else if (!process.send) {\n\tPM.spawn(Config.friendsprocesses || 1);\n}\n"],
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}