1 files changed, 84 insertions, 0 deletions

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
+}