forchange-api/lib/exam-model.js

A sdk of forchange api.

const co = require('co');
const APIs = require('st-api').APIs;
const HttpClient = require('st-api').HttpClient;
const assessApiConfig = require('./config/assess.api.config');
const bookApiConfig = require('./config/book.api.config');
/* eslint camelcase:0 */

const __instance = (function () {
	let instance = null;
	return (_ins) => {
		if (_ins) {
			instance = _ins;
		}
		return instance;
	};
})();

let apis = {};
let bookTokenModel = null;
let assessTokenModel = null;

class ExamModel {
	constructor(opts) {
		if (__instance()) {
			return __instance();
		}
		__instance(this);
	}

	static config(opts) {
		assessApiConfig.defaultHost = opts.assessHost;
		bookApiConfig.defaultHost = opts.bookHost;
		let httpClient = new HttpClient();
		let _assessapis = new APIs(assessApiConfig, httpClient);
		let _bookapis = new APIs(bookApiConfig, httpClient);
		Object.assign(apis, _assessapis, _bookapis);
		bookTokenModel = opts.bookTokenModel;
		assessTokenModel = opts.assessTokenModel;
	}

	getExamList(page, per_page) {
		return co(function* () {
			if (!(bookTokenModel && apis.examList)) {
				throw new Error(
					'You must config ExamModel with ExamModel.config(options) before use this method.'
				);
			}
			let token = yield bookTokenModel.getToken();
			page = page || 1;
			per_page = per_page || 10;
			let qs = {
				page,
				per_page,
				token
			};
			let data = yield apis.examList.get(qs);
			// 这里应该用 error code 判断，但暂时接口文档没有
			if (!data.data) {
				throw new Error(`An error occured when request ${apis.examList.url}`);
			}
			return {
				exams: data.data,
				total: data.meta.pagination.total,
				count: data.meta.pagination.count,
				per_page: data.meta.pagination.per_page,
				current_page: data.meta.pagination.current_page,
				total_pages: data.meta.pagination.total_pages
			};
		});
	}

	getExamScore(book_ids) {
		return co(function* () {
			if (!(assessTokenModel && apis.examScore)) {
				throw new Error(
					'You must config ExamModel with ExamModel.config(options) before use this method.'
				);
			}
			if (!Array.isArray(book_ids)) {
				throw new Error('book_ids must be an instance of Array.');
			}
			let token = yield assessTokenModel.getToken();
			let body = {
				book_ids
			};
			let data = yield apis.examScore.post(body);
			if (!data.data) {
				throw new Error(`An error occured when request ${apis.examScore.url}`);
			}
			let list = data.data;
			let result = [];
			for (let key in list) {
				let temp = {};
				temp.id = parseInt(key, 10);
				temp.score = list[key];
				result.push(temp);
			}
			return result;
		});
	}
}

module.exports = ExamModel;