init commit

src/_export.js

@@ -0,0 +1,75 @@
+import _core, { isReadyCalled } from "./_core";
+
+function _exec(target, func, ...params) {
+  let instant = target;
+  let funcs = func.split('.');
+  while (funcs.length > 1) {
+    instant = instant[funcs.shift()];
+  }
+  if (instant && funcs.length == 1) {
+    if (instant.hasOwnProperty(funcs[0])) {
+      return instant[funcs[0]](...params);
+    }
+  }
+  throw `IScan.${func} not defined`;
+}
+
+function hook(target, method, action) {
+  let fns = method.split('.');
+  fns.forEach((fn, index) => {
+    if (index == fns.length - 1) {
+      target[fn] = action;
+    } else {
+      if (!target[fn]) {
+        target[fn] = {};
+      }
+    }
+    target = target[fn];
+  });
+}
+
+function forMethods(obj, parent = "") {
+  let keys = {}
+  Object.keys(obj).forEach(key => {
+    let val = obj[key];
+    if (typeof val === "object") {
+      Object.assign(keys, forMethods(val, `${parent}${key}.`));
+    } else if (typeof val === "function") {
+      let realKey = `${parent}${key}`;
+      Object.assign(keys, { [realKey]: realKey });
+    }
+  })
+  return keys;
+}
+
+function freezeObj(obj) {
+  Object.keys(obj).forEach(key => {
+    let val = obj[key];
+    if (typeof val === "object") {
+      freezeObj(val)
+    }
+  })
+  Object.freeze(obj);
+}
+
+export function exportSDK(lib, funcs, ...initNames) {
+  let methods = {};
+  if (funcs && typeof funcs === 'object') {
+    methods = funcs;
+  } else {
+    methods = forMethods(lib);
+  }
+  const library = {};
+  Object.keys(methods).forEach(method => {
+    let methodItem = methods[method];
+    let methodName = methodItem && methodItem.method || method;
+    hook(library, method, (...params) => {
+      if (!isReadyCalled() && initNames && initNames.indexOf(method) < 0) {
+        throw `[IScan]:Can't call the "IScan.${method}" method, because "IScan" not ready, please confirm that "IScan.ready()" has been called. params: ${JSON.stringify(params)}`
+      }
+      return _exec(lib, methodName, ...params);
+    });
+  });
+  freezeObj(library);
+  return library;
+}