index.js

const _toString = Object.prototype.toString;
const hasOwnProperty = Object.prototype.hasOwnProperty;

function isFn (fn) {
  return typeof fn === 'function'
}

function isStr (str) {
  return typeof str === 'string'
}

function isPlainObject (obj) {
  return _toString.call(obj) === '[object Object]'
}

function hasOwn (obj, key) {
  return hasOwnProperty.call(obj, key)
}

const SYNC_API_RE = /hideKeyboard|upx2px|canIUse|^create|Sync$|Manager$/;

const CONTEXT_API_RE = /^create|Manager$/;

const CALLBACK_API_RE = /^on/;

function isContextApi (name) {
  return CONTEXT_API_RE.test(name)
}
function isSyncApi (name) {
  return SYNC_API_RE.test(name)
}

function isCallbackApi (name) {
  return CALLBACK_API_RE.test(name)
}

function handlePromise (promise) {
  return promise.then(data => {
    return [null, data]
  })
    .catch(err => [err])
}

function shouldPromise (name) {
  if (isSyncApi(name)) {
    return false
  }
  if (isCallbackApi(name)) {
    return false
  }
  return true
}

function promisify (name, api) {
  if (!shouldPromise(name)) {
    return api
  }
  return function promiseApi (options = {}, ...params) {
    if (isFn(options.success) || isFn(options.fail) || isFn(options.complete)) {
      return api(options, ...params)
    }
    return handlePromise(new Promise((resolve, reject) => {
      api(Object.assign({}, options, {
        success: resolve,
        fail: reject
      }), ...params);
      /* eslint-disable no-extend-native */
      Promise.prototype.finally = function (callback) {
        const promise = this.constructor;
        return this.then(
          value => promise.resolve(callback()).then(() => value),
          reason => promise.resolve(callback()).then(() => {
            throw reason
          })
        )
      };
    }))
  }
}

const EPS = 1e-4;
const BASE_DEVICE_WIDTH = 750;
let isIOS = false;
let deviceWidth = 0;
let deviceDPR = 0;

function checkDeviceWidth () {
  const {
    platform,
    pixelRatio,
    windowWidth
  } = wx.getSystemInfoSync(); // uni=>wx runtime 编译目标是 uni 对象，内部不允许直接使用 uni

  deviceWidth = windowWidth;
  deviceDPR = pixelRatio;
  isIOS = platform === 'ios';
}

function upx2px (number, newDeviceWidth) {
  if (deviceWidth === 0) {
    checkDeviceWidth();
  }

  number = Number(number);
  if (number === 0) {
    return 0
  }
  let result = (number / BASE_DEVICE_WIDTH) * (newDeviceWidth || deviceWidth);
  if (result < 0) {
    result = -result;
  }
  result = Math.floor(result + EPS);
  if (result === 0) {
    if (deviceDPR === 1 || !isIOS) {
      return 1
    } else {
      return 0.5
    }
  }
  return number < 0 ? -result : result
}

var protocols = {};

const CALLBACKS = ['success', 'fail', 'cancel', 'complete'];

function processCallback (methodName, method, returnValue) {
  return function (res) {
    return method(processReturnValue(methodName, res, returnValue))
  }
}

function processArgs (methodName, fromArgs, argsOption = {}, returnValue = {}, keepFromArgs = false) {
  if (isPlainObject(fromArgs)) { // 一般 api 的参数解析
    const toArgs = keepFromArgs === true ? fromArgs : {}; // returnValue 为 false 时，说明是格式化返回值，直接在返回值对象上修改赋值
    if (isFn(argsOption)) {
      argsOption = argsOption(fromArgs, toArgs) || {};
    }
    for (let key in fromArgs) {
      if (hasOwn(argsOption, key)) {
        let keyOption = argsOption[key];
        if (isFn(keyOption)) {
          keyOption = keyOption(fromArgs[key], fromArgs, toArgs);
        }
        if (!keyOption) { // 不支持的参数
          console.warn(`微信小程序 ${methodName}暂不支持${key}`);
        } else if (isStr(keyOption)) { // 重写参数 key
          toArgs[keyOption] = fromArgs[key];
        } else if (isPlainObject(keyOption)) { // {name:newName,value:value}可重新指定参数 key:value
          toArgs[keyOption.name ? keyOption.name : key] = keyOption.value;
        }
      } else if (CALLBACKS.includes(key)) {
        toArgs[key] = processCallback(methodName, fromArgs[key], returnValue);
      } else {
        if (!keepFromArgs) {
          toArgs[key] = fromArgs[key];
        }
      }
    }
    return toArgs
  } else if (isFn(fromArgs)) {
    fromArgs = processCallback(methodName, fromArgs, returnValue);
  }
  return fromArgs
}

function processReturnValue (methodName, res, returnValue, keepReturnValue = false) {
  if (isFn(protocols.returnValue)) { // 处理通用 returnValue
    res = protocols.returnValue(methodName, res);
  }
  return processArgs(methodName, res, returnValue, {}, keepReturnValue)
}

function wrapper (methodName, method) {
  if (hasOwn(protocols, methodName)) {
    const protocol = protocols[methodName];
    if (!protocol) { // 暂不支持的 api
      return function () {
        console.error(`微信小程序 暂不支持${methodName}`);
      }
    }
    return function (arg1, arg2) { // 目前 api 最多两个参数
      let options = protocol;
      if (isFn(protocol)) {
        options = protocol(arg1);
      }

      arg1 = processArgs(methodName, arg1, options.args, options.returnValue);

      const returnValue = wx[options.name || methodName](arg1, arg2);
      if (isSyncApi(methodName)) { // 同步 api
        return processReturnValue(methodName, returnValue, options.returnValue, isContextApi(methodName))
      }
      return returnValue
    }
  }
  return method
}

const todoApis = Object.create(null);

const TODOS = [
  'subscribePush',
  'unsubscribePush',
  'onPush',
  'offPush',
  'share'
];

function createTodoApi (name) {
  return function todoApi ({
    fail,
    complete
  }) {
    const res = {
      errMsg: `${name}:fail:暂不支持 ${name} 方法`
    };
    isFn(fail) && fail(res);
    isFn(complete) && complete(res);
  }
}

TODOS.forEach(function (name) {
  todoApis[name] = createTodoApi(name);
});

var providers = {
  oauth: ['weixin'],
  share: ['weixin'],
  payment: ['wxpay'],
  push: ['weixin']
};

function getProvider ({
  service,
  success,
  fail,
  complete
}) {
  let res = false;
  if (providers[service]) {
    res = {
      errMsg: 'getProvider:ok',
      service,
      provider: providers[service]
    };
    isFn(success) && success(res);
  } else {
    res = {
      errMsg: 'getProvider:fail:服务[' + service + ']不存在'
    };
    isFn(fail) && fail(res);
  }
  isFn(complete) && complete(res);
}

var extraApi = /*#__PURE__*/Object.freeze({
  getProvider: getProvider
});



var api = /*#__PURE__*/Object.freeze({

});

let uni = {};

if (typeof Proxy !== 'undefined') {
  uni = new Proxy({}, {
    get (target, name) {
      if (name === 'upx2px') {
        return upx2px
      }
      if (api[name]) {
        return promisify(name, api[name])
      }
      if (extraApi[name]) {
        return promisify(name, extraApi[name])
      }
      if (todoApis[name]) {
        return promisify(name, todoApis[name])
      }
      if (!hasOwn(wx, name) && !hasOwn(protocols, name)) {
        return
      }
      return promisify(name, wrapper(name, wx[name]))
    }
  });
} else {
  uni.upx2px = upx2px;

  Object.keys(todoApis).forEach(name => {
    uni[name] = promisify(name, todoApis[name]);
  });

  Object.keys(extraApi).forEach(name => {
    uni[name] = promisify(name, todoApis[name]);
  });

  Object.keys(api).forEach(name => {
    uni[name] = promisify(name, api[name]);
  });

  Object.keys(wx).forEach(name => {
    if (hasOwn(wx, name) || hasOwn(protocols, name)) {
      uni[name] = promisify(name, wrapper(name, wx[name]));
    }
  });
}

var uni$1 = uni;

export default uni$1;