summit-logger/src/summit-logger.js

A logger/debug tool for Summit University Dev Students. Creates "pretty-print" log messages, pleasant to the eye and easy to digest. (Summit University All Rights Reserved)

class SummitLogger {
   constructor(namespace) {
      this.namespace = namespace;
      this.enabled = this.isEnabled();
      this.color = this.generateColor();
      this._children = {};
   }

   isEnabled() {
      const storedDebugValue = storage.getItem("debug");
      if (!storedDebugValue) return false;

      const debugNamespaces = new Set(
         storedDebugValue.split(",").map((ns) => ns.trim())
      );
      return (
         debugNamespaces.has("*") ||
         debugNamespaces.has(this.namespace) ||
         [...debugNamespaces].some((ns) => ns.startsWith(`${this.namespace}:`))
      );
   }

   generateColor() {
      let hash = 0;
      for (let i = 0; i < this.namespace.length; i++) {
         hash = this.namespace.charCodeAt(i) + ((hash << 5) - hash);
      }
      const hue = Math.abs(hash) % 360;
      return `color: hsl(${hue}, 70%, 60%); font-weight: bold;`;
   }

   log(message, ...args) {
      if (!this.enabled) return;

      console.groupCollapsed(`%c${this.namespace}: ${message}`, this.color);
      args.forEach((arg) => console.log(arg));
      console.groupEnd();
   }

   extend(subspace) {
      if (!this._children) this._children = {};
      if (!this._children[subspace]) {
         this._children[subspace] = new SummitLogger(`${this.namespace}:${subspace}`);
      }
      return this._children[subspace];
   }

   enable() {
      const debugNamespaces = new Set(
         (storage.getItem("debug") || "").split(",").map((ns) => ns.trim())
      );
      debugNamespaces.add(this.namespace);
      storage.setItem("debug", [...debugNamespaces].join(","));
      this.enabled = true;
   }

   disable() {
      const debugNamespaces = new Set(
         (storage.getItem("debug") || "").split(",").map((ns) => ns.trim())
      );
      debugNamespaces.delete(this.namespace);
      storage.setItem("debug", [...debugNamespaces].join(","));
      this.enabled = false;
   }
}

const storage =
   typeof localStorage !== "undefined"
      ? localStorage
      : {
           store: {},
           getItem: (key) => storage.store[key] || null,
           setItem: (key, value) => (storage.store[key] = value),
           clear: () => (storage.store = {}),
        };

const _summitLogger = (namespace) => new SummitLogger(namespace);

export default _summitLogger;