4 files changed, 219 insertions, 2 deletions

diff --git a/server/lib/emailer.ts b/server/lib/emailer.ts
new file mode 100644
index 000000000..f5b68640e
--- /dev/null
+++ b/server/lib/emailer.ts
@@ -0,0 +1,106 @@
+import { createTransport, Transporter } from 'nodemailer'
+import { isTestInstance } from '../helpers/core-utils'
+import { logger } from '../helpers/logger'
+import { CONFIG } from '../initializers'
+import { JobQueue } from './job-queue'
+import { EmailPayload } from './job-queue/handlers/email'
+import { readFileSync } from 'fs'
+
+class Emailer {
+
+  private static instance: Emailer
+  private initialized = false
+  private transporter: Transporter
+
+  private constructor () {}
+
+  init () {
+    // Already initialized
+    if (this.initialized === true) return
+    this.initialized = true
+
+    if (CONFIG.SMTP.HOSTNAME && CONFIG.SMTP.PORT) {
+      logger.info('Using %s:%s as SMTP server.', CONFIG.SMTP.HOSTNAME, CONFIG.SMTP.PORT)
+
+      let tls
+      if (CONFIG.SMTP.CA_FILE) {
+        tls = {
+          ca: [ readFileSync(CONFIG.SMTP.CA_FILE) ]
+        }
+      }
+
+      this.transporter = createTransport({
+        host: CONFIG.SMTP.HOSTNAME,
+        port: CONFIG.SMTP.PORT,
+        secure: CONFIG.SMTP.TLS,
+        tls,
+        auth: {
+          user: CONFIG.SMTP.USERNAME,
+          pass: CONFIG.SMTP.PASSWORD
+        }
+      })
+    } else {
+      if (!isTestInstance()) {
+        logger.error('Cannot use SMTP server because of lack of configuration. PeerTube will not be able to send mails!')
+      }
+    }
+  }
+
+  async checkConnectionOrDie () {
+    if (!this.transporter) return
+
+    try {
+      const success = await this.transporter.verify()
+      if (success !== true) this.dieOnConnectionFailure()
+
+      logger.info('Successfully connected to SMTP server.')
+    } catch (err) {
+      this.dieOnConnectionFailure(err)
+    }
+  }
+
+  addForgetPasswordEmailJob (to: string, resetPasswordUrl: string) {
+    const text = `Hi dear user,\n\n` +
+      `It seems you forgot your password on ${CONFIG.WEBSERVER.HOST}! ` +
+      `Please follow this link to reset it: ${resetPasswordUrl}.\n\n` +
+      `If you are not the person who initiated this request, please ignore this email.\n\n` +
+      `Cheers,\n` +
+      `PeerTube.`
+
+    const emailPayload: EmailPayload = {
+      to: [ to ],
+      subject: 'Reset your PeerTube password',
+      text
+    }
+
+    return JobQueue.Instance.createJob({ type: 'email', payload: emailPayload })
+  }
+
+  sendMail (to: string[], subject: string, text: string) {
+    if (!this.transporter) {
+      throw new Error('Cannot send mail because SMTP is not configured.')
+    }
+
+    return this.transporter.sendMail({
+      from: CONFIG.SMTP.FROM_ADDRESS,
+      to: to.join(','),
+      subject,
+      text
+    })
+  }
+
+  private dieOnConnectionFailure (err?: Error) {
+    logger.error('Failed to connect to SMTP %s:%d.', CONFIG.SMTP.HOSTNAME, CONFIG.SMTP.PORT, err)
+    process.exit(-1)
+  }
+
+  static get Instance () {
+    return this.instance || (this.instance = new this())
+  }
+}
+
+// ---------------------------------------------------------------------------
+
+export {
+  Emailer
+}
diff --git a/server/lib/job-queue/handlers/email.ts b/server/lib/job-queue/handlers/email.ts
new file mode 100644
index 000000000..9d7686116
--- /dev/null
+++ b/server/lib/job-queue/handlers/email.ts
@@ -0,0 +1,22 @@
+import * as kue from 'kue'
+import { logger } from '../../../helpers/logger'
+import { Emailer } from '../../emailer'
+
+export type EmailPayload = {
+  to: string[]
+  subject: string
+  text: string
+}
+
+async function processEmail (job: kue.Job) {
+  const payload = job.data as EmailPayload
+  logger.info('Processing email in job %d.', job.id)
+
+  return Emailer.Instance.sendMail(payload.to, payload.subject, payload.text)
+}
+
+// ---------------------------------------------------------------------------
+
+export {
+  processEmail
+}
diff --git a/server/lib/job-queue/job-queue.ts b/server/lib/job-queue/job-queue.ts
index 7a2b6c78d..3f176f896 100644
--- a/server/lib/job-queue/job-queue.ts
+++ b/server/lib/job-queue/job-queue.ts
@@ -5,19 +5,22 @@ import { CONFIG, JOB_ATTEMPTS, JOB_COMPLETED_LIFETIME, JOB_CONCURRENCY } from '.
 import { ActivitypubHttpBroadcastPayload, processActivityPubHttpBroadcast } from './handlers/activitypub-http-broadcast'
 import { ActivitypubHttpFetcherPayload, processActivityPubHttpFetcher } from './handlers/activitypub-http-fetcher'
 import { ActivitypubHttpUnicastPayload, processActivityPubHttpUnicast } from './handlers/activitypub-http-unicast'
+import { EmailPayload, processEmail } from './handlers/email'
 import { processVideoFile, VideoFilePayload } from './handlers/video-file'
 
 type CreateJobArgument =
   { type: 'activitypub-http-broadcast', payload: ActivitypubHttpBroadcastPayload } |
   { type: 'activitypub-http-unicast', payload: ActivitypubHttpUnicastPayload } |
   { type: 'activitypub-http-fetcher', payload: ActivitypubHttpFetcherPayload } |
-  { type: 'video-file', payload: VideoFilePayload }
+  { type: 'video-file', payload: VideoFilePayload } |
+  { type: 'email', payload: EmailPayload }
 
 const handlers: { [ id in JobType ]: (job: kue.Job) => Promise<any>} = {
   'activitypub-http-broadcast': processActivityPubHttpBroadcast,
   'activitypub-http-unicast': processActivityPubHttpUnicast,
   'activitypub-http-fetcher': processActivityPubHttpFetcher,
-  'video-file': processVideoFile
+  'video-file': processVideoFile,
+  'email': processEmail
 }
 
 class JobQueue {
@@ -43,6 +46,8 @@ class JobQueue {
       }
     })
 
+    this.jobQueue.setMaxListeners(15)
+
     this.jobQueue.on('error', err => {
       logger.error('Error in job queue.', err)
       process.exit(-1)
diff --git a/server/lib/redis.ts b/server/lib/redis.ts
new file mode 100644
index 000000000..4240cc162
--- /dev/null
+++ b/server/lib/redis.ts
@@ -0,0 +1,84 @@
+import { createClient, RedisClient } from 'redis'
+import { logger } from '../helpers/logger'
+import { generateRandomString } from '../helpers/utils'
+import { CONFIG, USER_PASSWORD_RESET_LIFETIME } from '../initializers'
+
+class Redis {
+
+  private static instance: Redis
+  private initialized = false
+  private client: RedisClient
+  private prefix: string
+
+  private constructor () {}
+
+  init () {
+    // Already initialized
+    if (this.initialized === true) return
+    this.initialized = true
+
+    this.client = createClient({
+      host: CONFIG.REDIS.HOSTNAME,
+      port: CONFIG.REDIS.PORT
+    })
+
+    this.client.on('error', err => {
+      logger.error('Error in Redis client.', err)
+      process.exit(-1)
+    })
+
+    if (CONFIG.REDIS.AUTH) {
+      this.client.auth(CONFIG.REDIS.AUTH)
+    }
+
+    this.prefix = 'redis-' + CONFIG.WEBSERVER.HOST + '-'
+  }
+
+  async setResetPasswordVerificationString (userId: number) {
+    const generatedString = await generateRandomString(32)
+
+    await this.setValue(this.generateResetPasswordKey(userId), generatedString, USER_PASSWORD_RESET_LIFETIME)
+
+    return generatedString
+  }
+
+  async getResetPasswordLink (userId: number) {
+    return this.getValue(this.generateResetPasswordKey(userId))
+  }
+
+  private getValue (key: string) {
+    return new Promise<string>((res, rej) => {
+      this.client.get(this.prefix + key, (err, value) => {
+        if (err) return rej(err)
+
+        return res(value)
+      })
+    })
+  }
+
+  private setValue (key: string, value: string, expirationMilliseconds: number) {
+    return new Promise<void>((res, rej) => {
+      this.client.set(this.prefix + key, value, 'PX', expirationMilliseconds, (err, ok) => {
+        if (err) return rej(err)
+
+        if (ok !== 'OK') return rej(new Error('Redis result is not OK.'))
+
+        return res()
+      })
+    })
+  }
+
+  private generateResetPasswordKey (userId: number) {
+    return 'reset-password-' + userId
+  }
+
+  static get Instance () {
+    return this.instance || (this.instance = new this())
+  }
+}
+
+// ---------------------------------------------------------------------------
+
+export {
+  Redis
+}