uni-app 142点赞朋友圈api开发（一）

'use strict';
const Controller = require('egg').Controller;
class MomentController extends Controller {
    // 发布朋友圈
    async create() {
        const { ctx, app } = this;
        let current_user_id = ctx.authUser.id;
        // 参数验证
        ctx.validate({
            content: {
                type: 'string',
                required: false,
                desc: '内容'
            },
            image: {
                type: 'string',
                required: false,
                desc: '图片'
            },
            video: {
                type: 'string',
                required: false,
                desc: '视频'
            },
            type: {
                type: 'string',
                required: true,
                range: {
                    in: ['content', 'image', 'video']
                },
                desc: '朋友圈类型'
            },
            location: {
                type: 'string',
                required: false,
                desc: '位置'
            },
            remind: {
                type: 'string',
                required: false,
                defValue: "",
                desc: '提醒谁看'
            },
            see: {
                type: 'string',
                required: false,
                defValue: "all",
                desc: '谁可以看'
            }
        });
        let { content, image, video, type, location, remind, see } = ctx.request.body;
        if (!ctx.request.body[type]) {
            return ctx.apiFail(`${type} 不能为空`);
        }
        let moment = await app.model.Moment.create({
            content, image, video, location, remind, see,
            user_id: current_user_id
        });
        if (!moment) {
            return ctx.apiFail('发布失败');
        }
        // 推送到好友的时间轴
        this.toTimeline(moment);
        ctx.apiSuccess('ok');
    }
    // 推送到好友的时间轴
    async toTimeline(moment) {
        const { ctx, app } = this;
        let current_user_id = ctx.authUser.id;
        // 获取当前用户所有好友
        let friends = await app.model.Friend.findAll({
            where: {
                user_id: current_user_id,
                isblack: 0
            },
            attributes: ['friend_id']
        });
        // 谁可以看
        /**
         all                全部人可看
         only:1,2,3         指定人可见
         except:1,2,3       谁不可看
         none               仅自己可见
         */
        let sees = moment.see.split(':');
        let o = {
            only: [],
            except: []
        }
        let oType = sees[0];
        if ((sees[0] === 'only' || sees[0] === 'except') && sees[1]) {
            o[sees[0]] = (sees[1].split(',')).map(v => parseInt(v));
        }
        let addData = friends.filter(item => {
            return oType === 'all' || (oType === 'only' && o.only.includes(item.friend_id)) || (oType === 'except' && !o.except.includes(item.friend_id));
        });
        addData = addData.map(item => {
            return {
                user_id: item.friend_id,
                moment_id: moment.id,
                own: 0
            }
        });
        addData.push({
            user_id: current_user_id,
            moment_id: moment.id,
            own: 1
        });
        // 推送到时间轴当中
        await app.model.MomentTimeline.bulkCreate(addData);
        // 消息推送
        let message = {
            avatar: ctx.authUser.avatar,
            user_id: current_user_id,
            type: "new"
        }
        addData.forEach(item => {
            ctx.sendAndSaveMessage(item.user_id, message, 'moment');
        });
        // 提醒用户
        if (moment.remind) {
            let arr = moment.remind.split(',');
            arr.forEach(user_id => {
                ctx.sendAndSaveMessage(user_id, {
                    avatar: ctx.authUser.avatar,
                    user_id: current_user_id,
                    type: "remind"
                }, 'moment');
            });
        }
    }
    // 点赞
    async like() {
        const { ctx, app } = this;
        let current_user_id = ctx.authUser.id;
        ctx.validate({
            id: {
                type: "int",
                required: true,
                desc: "朋友圈id"
            }
        });
        
        let { id } = ctx.request.body;
        let MomentTimeline = await app.model.MomentTimeline.findOne({
            where: {
                user_id: current_user_id,
                moment_id: id
            },
            include: [{
                model: app.model.Moment,
                attributes: ['user_id'],
                include: [{
                    model: app.model.MomentLike,
                    attributes: ['user_id'],
                }]
            }]
        });
        if (!MomentTimeline) {
            return ctx.apiFail('朋友圈消息不存在');
        }
        let like = await app.model.MomentLike.findOne({
            where: {
                user_id: current_user_id,
                moment_id: id
            }
        });
        let message = {
            avatar: ctx.authUser.avatar,
            user_id: current_user_id,
            type: "like"
        }
        if (like) {
            await like.destroy();
            ctx.apiSuccess(MomentTimeline.moment.moment_likes);
        } else {
            await app.model.MomentLike.create({
                user_id: current_user_id,
                moment_id: id
            });
            ctx.apiSuccess(MomentTimeline.moment.moment_likes);
        }
        // 通知作者
        if (MomentTimeline.moment.user_id && MomentTimeline.moment.user_id !== current_user_id) {
            ctx.sendAndSaveMessage(MomentTimeline.moment.user_id, message, 'moment');
        }
        // 通知相关人
        MomentTimeline.moment.moment_likes.forEach(item => {
            if (item.user_id !== current_user_id) {
                ctx.sendAndSaveMessage(item.user_id, message, 'moment');
            }
        });
    }
    
}
module.exports = MomentController;