init

src/common/Provider.js

@@ -0,0 +1,56 @@
+const { getFuncProps } = require('../utils');
+const moduleMap = require('./DepMap');
+
+class Provider {
+    constructor() {
+        this._cache = {};
+        this.init();
+    }
+    static getInstance() {
+        if (!Provider.instance) {
+            Provider.instance = new Provider();
+        }
+        return Provider.instance;
+    }
+    get cache() {
+        return this._cache;
+    }
+    init() {
+        this._cache = moduleMap;
+    }
+    regist(key, value) {
+        this._cache[key] = value;
+    }
+    loadDep (depName) {
+        const dep = moduleMap[depName];
+        if (dep) {
+            this._cache[depName] = require(dep);
+        }
+    }
+    inject(fn, scope = {}) {
+        const deps = getFuncProps(fn) || [];
+        for(let i = 0, len = deps.length; i < len; i++) {
+            const depName = deps[i];
+            const dep = this.cache[depName];
+            if(dep) {
+                deps[i] = dep;
+            } else {
+                throw new Error('Cannot find dependence');
+            }
+        }
+        return fn.apply(scope, deps);
+    }
+    getModule(depName) {
+        if (!this.cache[depName]) {
+            this.loadDep(depName);
+        }
+        return this.cache[depName] || {};
+    }
+}
+const provider = Provider.getInstance();
+global.Provider = provider;
+
+module.exports = {
+    inject: (...args) => provider.inject(...args),
+    regist: (...args) => provider.regist(...args),
+};