respond-framework/dist/createModule/createDbCache.js

create as fast you think

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
const createDbCache = (respond, cache) => ({
  keygen: new Map(),
  key({
    args,
    userId
  }) {
    return userId ? `${JSON.stringify(args)}:${userId}` : JSON.stringify(args);
  },
  has(body) {
    return this.get(body) !== undefined;
  },
  get(body) {
    const {
      branch,
      table,
      method
    } = body;
    const k = this.key(body);
    this.keygen.set(body, k); // key generated once per request on cache.get (optimization)  

    return cache[branch]?.[table]?.[method]?.[k];
  },
  set(body, v) {
    const {
      branch,
      table,
      method
    } = body;
    const k = this.keygen.get(body) ?? this.key(body); // key reused if already generated per request

    this.keygen.delete(body);
    cache[branch] ??= {};
    cache[branch][table] ??= {};
    cache[branch][table][method] ??= {};
    cache[branch][table][method][k] = v;
  },
  delete({
    table,
    method,
    args,
    userId
  }) {
    const items = cache[branch]?.[table]?.[method] ?? {};
    const key = this.key({
      args,
      userId
    });
    delete items[key];
  },
  clear({
    table,
    method,
    args,
    userId
  }) {
    const {
      branch
    } = respond;
    if (table && method && args && userId) {
      this.delete({
        table,
        method,
        args,
        userId
      });
    } else if (table && method && args) {
      const items = cache[branch]?.[table]?.[method] ?? {};
      const key = this.key({
        args
      });
      Object.keys(items).forEach(k => {
        if (k.indexOf(key) === 0) delete items[k];
      });
    } else if (table && method) {
      if (cache[branch][table]) {
        cache[branch][table][method] = {};
      }
    } else if (table) {
      cache[branch][table] = {};
    } else {
      cache[branch] = {};
    }
  }
});
var _default = exports.default = createDbCache;