All files / service lru.js

18.52% Statements 5/27
15.79% Branches 3/19
9.09% Functions 1/11
20.83% Lines 5/24

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class LRU {
  constructor(crowi) {
    this.crowi = crowi
    this.max = 10
    this.client = null
 
    Iif (this.crowi && this.crowi.redis) {
      this.client = this.crowi.redis
    }
  }
 
  removeByRange(namespace, max) {
    if (this.client) {
      return new Promise((resolve, reject) => {
        this.client.zremrangebyrank(namespace, 0, max, (err, response) => {
          if (err) reject(err)
          resolve(response)
        })
      })
    }
  }
 
  async add(namespace, key) {
    if (this.client) {
      await this.removeByRange(namespace, -this.max - 1)
      return new Promise((resolve, reject) => {
        this.client.zadd(namespace, Date.now(), key, (err, response) => {
          if (err) reject(err)
          resolve(response)
        })
      })
    }
  }
 
  range(namespace, limit = 0) {
    if (this.client) {
      return new Promise((resolve, reject) => {
        this.client.zrevrange(namespace, 0, limit - 1, (err, response) => {
          if (err) reject(err)
          resolve(response)
        })
      })
    }
  }
 
  get(namespace, limit) {
    if (this.client) {
      return this.range(namespace, limit)
    }
  }
}
 
module.exports = LRU