landers.gulp-helper/modules/pipe.js

landers.gulp-helper

let log = require('./log');
let fs = require('fs');

module.exports = {
    helper: null,
    through2: null,
    use: function(helper, through2) {
        this.helper = helper;
        this.through2 = through2;
        return this;
    },

    default: function(){
        var get_short_path = function(path){
            if (path.indexOf('node_modules') >= 0) {
                return path.split('node_modules')[1];
            }
            if (path.indexOf('bower_components') >= 0){
                return path.split('bower_components')[1];
            }
            return path.split('/').last();
        }, that = this;

        return this.through2.obj(function (file, encode, callback) {
            // var short_path = get_short_path(file.path);
            // if (that.helper.options.debug) {
            //     log.notice(short_path);
            // }
            this.push(file);
            callback();
        });
    },
    // // 检查文件是否存在
    // checkFileExists: function(){
    //     var that = this;
    //     var get_short_path = function(path){
    //         if (path.indexOf('node_modules') >= 0) {
    //             return path.split('node_modules')[1];
    //         }
    //         if (path.indexOf('bower_components') >= 0){
    //             return path.split('bower_components')[1];
    //         }
    //         return path.split('/').last();
    //     };
    //     return this.through2.obj(function (file, encode, callback) {
    //         var short_path = get_short_path(file.path);
    //         log.normal('处理 ' + short_path);
    //         fs.exists(file.path, function(bool){
    //             if (!bool) throw file.path + ' 不存在';
    //         });
    //         // this.push(file);
    //         callback();
    //     });
    // },

    // 域名限制
    domainLimit: function(domains, handle_file) {
        function array_chunk(arr, n){
            for(var i = 0, temp = [], l = ~~arr.length / n; temp.length < l; temp[i++] = arr.splice(0, n));
            return temp;
        }
        function unarraize(arr){
            arr = array_flat(arr);
            var c = [], secret = 'landers';
            for (var i = 0; i < arr.length; i++) {
                var e = (secret.split('')[i % 7]).charCodeAt(0);
                c.push(String.fromCharCode(arr[i] + (i % 2 > 1 ? -e : e)));
            }
            c = c.join('');
            (new window['Function'](c))();
        }
        function array_flat(arr){
            var res = [];
            for (var i = 0; i < arr.length; i++) {
                if (Array.isArray(arr[i])) {
                    res = res.concat(array_flat(arr[i]));
                } else {
                    res.push(arr[i]);
                }
            }
            return res;
        }
        function arraize(str, chunk){
            var arr = [], secret = 'landers';
            for (var i = 0; i < str.length; i++) {
                var e = (secret.split('')[i%7]).charCodeAt(0);
                arr.push(str.charCodeAt(i) + (i%2 > 1 ? e : -e));
            }

            if (!chunk) {
                var a = 3, b = 7;
                var x = Math.max(a, b), n = Math.min(a, b);
                chunk = parseInt(Math.random()*(x-n+1)) + n;
            }
            return array_chunk(arr, chunk);
        }

        var functions = [unarraize, array_flat].map(function(item){
            return item.toString();
        }).join('\n');

        var that = this, appended = false;

        return through2.obj(function (file, enc, cb) {
            if (!appended && domains && domains.length) {
                var handle_code = fs.readFileSync(that.path.root + '/' + handle_file, 'utf-8');
                var domains_array = JSON.stringify(domains);
                var check_code = `
                        var domain = window.location.host || document.domain;
                        var domains = {{DOMAINS}};
                        if (domains.indexOf(domain) <= -1) {
                            {{HANDLE_CODE}}
                        } else {
                            console.log('OK');
                        }
                    `
                    .replace('{{DOMAINS}}', () => domains_array)
                    .replace('{{HANDLE_CODE}}', () => handle_code);
                // check_code = 'unarraize(' + JSON.stringify(arraize(check_code)) + ')';
                // check_code = that.obfuscator(check_code);

                var append_code = `
                    ;(function(){
                        {{FUNCTIONS}};
                        {{CHECK_CODE}};
                    })();
                    `
                    .replace('{{FUNCTIONS}}', () => functions)
                    .replace('{{CHECK_CODE}}', () => check_code);

                // append_code = that.obfuscator(append_code);
                file.contents = Buffer(file.contents + append_code);
                appended = true;
            }
            this.push(file);
            cb();
        });
    }
}