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'use strict';

// TO DO: 将交作业次数相同的同学的名字按字母顺序排列

var fs = require('fs');

var path = require('path');

var homeworkPath = path.join(__dirname, '../homework');

var nameFilePath = path.join(__dirname, 'homework.json');

var ext = ['md', 'jpg', 'jpeg', 'png', 'js']

.map(ele => '.' + ele);

var ignore = ['.DS_Store', 'readme.md', 'Thumbs.db']

.map(ele => ele.toLowerCase());

var homework = {};

function start() {

var folders = readFolders();

if (folders === -1) {

console.log('读取作业文件夹失败，请检查路径');

return -1;

}

var names = getNames(folders);

if (names <= 0) {

console.log('没有同学交过作业，是不是哪里出了问题？');

return -1;

}

}

function readFolders() {

try {

var files = fs.readdirSync(homeworkPath);

if (files.length <= 0) {

return -1;

}

return filterFolders(files);

} catch (ex) {

return -1;

}

}

function filterFolders(files) {

for (var i = files.length - 1; i >= 0; i--) {

var fullPath = path.join(homeworkPath, files[i]);

if (!fs.statSync(fullPath).isDirectory() || files[i].endsWith('4')) {

files.splice(i, 1);

}

}

return files;

}

function getNames(folders) {

for (var i = 0; i < folders.length; i++) {

readNames(folders[i]);

}

var result = sortNames();

writeNames(result);

}

function readNames(folder) {

var fullPath = path.join(homeworkPath, folder);

try {

var names = fs.readdirSync(fullPath);

if (names.length <= 0) {

return -1;

}

names = filterNames(folder, names);

if (names.length > 0) {

countNames(names);

}

} catch (ex) {

return -1;

}

}

function filterNames(folder, names) {

for (var i = names.length - 1; i >= 0; i--) {

if (ext.indexOf(path.extname(names[i]).toLowerCase()) < 0 ||

ignore.indexOf(names[i].toLowerCase()) >= 0 ||

(i > 0 &&

path.basename(names[i], path.extname(names[i]))

.toLowerCase() ===

path.basename(names[i - 1], path.extname(names[i - 1]))

.toLowerCase())) {

console.log(folder + ' 中的文件 ' + names[i] + ' 已被跳过。');

names.splice(i, 1);

}

}

return names = names

.map(name => name.toLowerCase())

.map(name => path.basename(name, path.extname(name)));

}

function countNames(names) {

for (var i = 0; i < names.length; i++) {

homework[names[i]] = names[i] in homework ? homework[names[i]] + 1 : 1;

}

}

function sortNames() {

var sortNames = [];

for (var name in homework) {

sortNames.push([name, homework[name]]);

}

// https://stackoverflow.com/a/1069840/2667665

homework = sortNames.sort(function (a, b) {

return b[1] - a[1];

});

var result = '';

for (var i = 0; i < homework.length; i++) {

result += homework[i][0] + ': ' + homework[i][1] + '\n';

}

return result.trim();

}

function writeNames(result) {

try {

fs.writeFileSync(nameFilePath, result);

} catch (ex) {

console.log(ex.message);

return -1;

}

}

start();