Building a Fishing Venue Reservation Mini-program: Backend Architecture and Core Logic
Background
A platform designed for fishing venue owners and enthusiasts to facilitate information sharing and service access.
Feature Planning
- Venue Booking: Users can browse locations, facilities, and availability of different venues, selecting date, time slot, and number of participants for booking.
- Fishing Events: Users can view event details and register for competitions. Organizers manage registrations, including check-ins, records, photos, and feedback.
- Event Analytics: The system tracks participation numbers, ratings, and user feedback.
Sysstem Overview
Database Schema
ActivityModel.DB_STRUCTURE = {
_pid: 'string|true',
ACTIVITY_ID: 'string|true',
ACTIVITY_TITLE: 'string|true|comment=Title',
ACTIVITY_STATUS: 'int|true|default=1|comment=Status 0=Inactive,1=Active',
ACTIVITY_CATE_ID: 'string|true|default=0|comment=Category ID',
ACTIVITY_CATE_NAME: 'string|false|comment=Category Name',
ACTIVITY_CANCEL_SET: 'int|true|default=1|comment=Cancel Policy 0=Not Allowed,1=Allowed,2=Only Before Start',
ACTIVITY_CHECK_SET: 'int|true|default=0|comment=Review 0=None,1=Required',
ACTIVITY_IS_MENU: 'int|true|default=1|comment=Public List',
ACTIVITY_MAX_CNT: 'int|true|default=20|comment=Max Participants 0=Unlimited',
ACTIVITY_START: 'int|false|comment=Start Time',
ACTIVITY_END: 'int|false|comment=End Time',
ACTIVITY_STOP: 'int|true|default=0|comment=Registration Deadline 0=Never',
ACTIVITY_ORDER: 'int|true|default=9999',
ACTIVITY_VOUCH: 'int|true|default=0',
ACTIVITY_FORMS: 'array|true|default=[]',
ACTIVITY_OBJ: 'object|true|default={}',
ACTIVITY_JOIN_FORMS: 'array|true|default=[]',
ACTIVITY_ADDRESS: 'string|false|comment=Address',
ACTIVITY_ADDRESS_GEO: 'object|false|comment=Coordinates',
ACTIVITY_QR: 'string|false',
ACTIVITY_VIEW_CNT: 'int|true|default=0',
ACTIVITY_JOIN_CNT: 'int|true|default=0',
ACTIVITY_COMMENT_CNT: 'int|true|default=0',
ACTIVITY_USER_LIST: 'array|true|default=[]|comment={name,id,pic}',
ACTIVITY_ADD_TIME: 'int|true',
ACTIVITY_EDIT_TIME: 'int|true',
ACTIVITY_ADD_IP: 'string|false',
ACTIVITY_EDIT_IP: 'string|false',
};
MeetModel.DB_STRUCTURE = {
_pid: 'string|true',
MEET_ID: 'string|true',
MEET_ADMIN_ID: 'string|true|comment=Admin ID',
MEET_TITLE: 'string|true|comment=Title',
MEET_JOIN_FORMS: 'array|true|default=[]|comment=Registration Fields',
MEET_DAYS: 'array|true|default=[]|comment=Available Dates',
MEET_CATE_ID: 'string|true|comment=Category ID',
MEET_CATE_NAME: 'string|true|comment=Category Name',
MEET_ADDRESS: 'string|false|comment=Address',
MEET_ADDRESS_GEO: 'object|false|comment=Coordinates',
MEET_FORMS: 'array|true|default=[]',
MEET_OBJ: 'object|true|default={}',
MEET_CANCEL_SET: 'int|true|default=1|comment=Cancel Policy 0=Not Allowed,1=Allowed,2=Before Start Only',
MEET_STATUS: 'int|true|default=1|comment=Status 0=Inactive,1=Active,9=Booking Closed,10=Closed',
MEET_ORDER: 'int|true|default=9999',
MEET_VOUCH: 'int|true|default=0',
MEET_QR: 'string|false',
MEET_ADD_TIME: 'int|true',
MEET_EDIT_TIME: 'int|true',
MEET_ADD_IP: 'string|false',
MEET_EDIT_IP: 'string|false',
};
Core Service Implementation
class MeetService extends BaseProjectService {
constructor() {
super();
this._log = new LogUtil(projectConfig.MEET_LOG_LEVEL);
}
AppError(msg) {
this._log.error(msg);
super.AppError(msg);
}
_meetLog(meet, func = '', msg = '') {
let str = '';
str = `[MEET=${meet.MEET_TITLE}][${func}] ${msg}`;
this._log.debug(str);
}
async getMeetOneDay(meetId, day, where, fields = '*') {
let meet = await MeetModel.getOne(where, fields);
if (!meet) return meet;
meet.MEET_DAYS_SET = await this.getDaysSet(meetId, day, day);
return meet;
}
async getDaysSet(meetId, startDay, endDay = null) {
let where = {
DAY_MEET_ID: meetId
};
if (startDay && endDay && endDay == startDay)
where.day = startDay;
else if (startDay && endDay)
where.day = ['between', startDay, endDay];
else if (!startDay && endDay)
where.day = ['<=', endDay];
else if (startDay && !endDay)
where.day = ['>=', startDay];
let orderBy = {
'day': 'asc'
};
let list = await DayModel.getAllBig(where, 'day,dayDesc,times', orderBy, 1000);
for (let k = 0; k < list.length; k++) {
delete list[k]._id;
}
return list;
}
async statJoinCnt(meetId, timeMark) {
let whereDay = {
DAY_MEET_ID: meetId,
day: this.getDayByTimeMark(timeMark)
};
let day = await DayModel.getOne(whereDay, 'times');
if (!day) return;
let whereJoin = {
JOIN_MEET_TIME_MARK: timeMark,
JOIN_MEET_ID: meetId
};
let ret = await JoinModel.groupCount(whereJoin, 'JOIN_STATUS');
let stat = {
succCnt: ret['JOIN_STATUS_1'] || 0,
cancelCnt: ret['JOIN_STATUS_10'] || 0,
adminCancelCnt: ret['JOIN_STATUS_99'] || 0
};
let times = day.times;
for (let j in times) {
if (times[j].mark === timeMark) {
let data = {
['times.' + j + '.stat']: stat
};
await DayModel.edit(whereDay, data);
return;
}
}
}
async beforeJoin(userId, meetId, timeMark) {
await this.checkMeetRules(userId, meetId, timeMark);
}
async join() {
// Implementation here
}
getDaySetByDay(meet, day) {
for (let k = 0; k < meet.MEET_DAYS_SET.length; k++) {
if (meet.MEET_DAYS_SET[k].day == day)
return dataUtil.deepClone(meet.MEET_DAYS_SET[k]);
}
return null;
}
getDayByTimeMark(timeMark) {
return timeMark.substr(1, 4) + '-' + timeMark.substr(5, 2) + '-' + timeMark.substr(7, 2);
}
getDaySetByTimeMark(meet, timeMark) {
let day = this.getDayByTimeMark(timeMark);
for (let k = 0; k < meet.MEET_DAYS_SET.length; k++) {
if (meet.MEET_DAYS_SET[k].day == day)
return dataUtil.deepClone(meet.MEET_DAYS_SET[k]);
}
return null;
}
getTimeSetByTimeMark(meet, timeMark) {
let day = this.getDayByTimeMark(timeMark);
for (let k = 0; k < meet.MEET_DAYS_SET.length; k++) {
if (meet.MEET_DAYS_SET[k].day != day) continue;
for (let j in meet.MEET_DAYS_SET[k].times) {
if (meet.MEET_DAYS_SET[k].times[j].mark == timeMark)
return dataUtil.deepClone(meet.MEET_DAYS_SET[k].times[j]);
}
}
return null;
}
async checkMeetTimeControll(meet, timeMark, meetPeopleCnt = 1) {
if (!meet) this.AppError('Invalid meeting time settings');
let daySet = this.getDaySetByTimeMark(meet, timeMark);
let timeSet = this.getTimeSetByTimeMark(meet, timeMark);
if (!daySet || !timeSet) this.AppError('Invalid meeting time settings');
let statusDesc = timeSet.status == 1 ? 'Open' : 'Closed';
let limitDesc = '';
if (timeSet.isLimit) {
limitDesc = 'Max=' + timeSet.limit;
} else {
limitDesc = 'No Limit';
}
this._meetLog(meet, `------------------------------`);
this._meetLog(meet, `#Time Control, Date=<${daySet.day}>`, `Time Slot=[${timeSet.start}-${timeSet.end}], Status=${statusDesc}, ${limitDesc}, Success Count=${timeSet.stat.succCnt}`);
if (timeSet.status == 0) this.AppError('Time slot is closed');
if (timeSet.isLimit) {
if (timeSet.stat.succCnt >= timeSet.limit) {
this.AppError('Time slot is full');
}
let maxCnt = timeSet.limit - timeSet.stat.succCnt;
if (maxCnt < meetPeopleCnt) {
this.AppError(`Only ${maxCnt} spots left, you requested ${meetPeopleCnt}`);
}
}
}
async checkMeetRules(userId, meetId, timeMark, formsList = null) {
let meetWhere = {
_id: meetId
};
let day = this.getDayByTimeMark(timeMark);
let meet = await this.getMeetOneDay(meetId, day, meetWhere);
if (!meet) {
this.AppError('Invalid time slot selection');
}
let meetPeopleCnt = formsList ? formsList.length : 1;
await this.checkMeetTimeControll(meet, timeMark, meetPeopleCnt);
await this.checkMeetEndSet(meet, timeMark);
await this.checkMeetLimitSet(userId, meet, timeMark, meetPeopleCnt);
}
async checkMeetLimitSet(userId, meet, timeMark, nowCnt) {
if (!meet) this.AppError('Invalid booking rule');
let meetId = meet._id;
let daySet = this.getDaySetByTimeMark(meet, timeMark);
let timeSet = this.getTimeSetByTimeMark(meet, timeMark);
this._meetLog(meet, `------------------------------`);
this._meetLog(meet, `#Booking Limit, Date=<${daySet.day}>`, `Time Slot=[${timeSet.start}~${timeSet.end}]`);
let where = {
JOIN_MEET_ID: meetId,
JOIN_MEET_TIME_MARK: timeMark,
JOIN_USER_ID: userId,
JOIN_STATUS: JoinModel.STATUS.SUCC
};
let cnt = await JoinModel.count(where);
let maxCnt = projectConfig.MEET_MAX_JOIN_CNT;
this._meetLog(meet, `Booking Limit, Max=${maxCnt}`, `Current=${cnt}`);
if (cnt >= maxCnt)
this.AppError(`Already booked for this time slot`);
}
async checkMeetEndSet(meet, timeMark) {
if (!meet) this.AppError('Invalid booking deadline');
this._meetLog(meet, `------------------------------`);
let daySet = this.getDaySetByTimeMark(meet, timeMark);
let timeSet = this.getTimeSetByTimeMark(meet, timeMark);
this._meetLog(meet, `#Booking Deadline, Date=<${daySet.day}>`, `Time Slot=[${timeSet.start}-${timeSet.end}]`);
let nowTime = timeUtil.time('Y-M-D h:m:s');
let endTime = daySet.day + ' ' + timeSet.end + ':59';
this._meetLog(meet, `Deadline Check`, `End Time=${endTime}, Now=${nowTime}`);
if (nowTime > endTime) {
this.AppError('Time slot has ended');
}
}
async viewMeet(meetId) {
let fields = '*';
let where = {
_id: meetId,
MEET_STATUS: ['in', [MeetModel.STATUS.COMM, MeetModel.STATUS.OVER]]
};
let meet = await MeetModel.getOne(where, fields);
if (!meet) return null;
let getDaysSet = [];
meet.MEET_DAYS_SET = await this.getDaysSet(meetId, timeUtil.time('Y-M-D'));
let daysSet = meet.MEET_DAYS_SET;
let now = timeUtil.time('Y-M-D');
for (let k = 0; k < daysSet.length; k++) {
let dayNode = daysSet[k];
if (dayNode.day < now) continue;
let getTimes = [];
for (let j in dayNode.times) {
let timeNode = dayNode.times[j];
if (timeNode.status != 1) continue;
if (timeNode.isLimit && timeNode.stat.succCnt >= timeNode.limit)
timeNode.error = 'Full';
if (!timeNode.error) {
try {
await this.checkMeetEndSet(meet, timeNode.mark);
} catch (ex) {
if (ex.name == 'AppError')
timeNode.error = 'Ended';
else
throw ex;
}
}
getTimes.push(timeNode);
}
dayNode.times = getTimes;
getDaysSet.push(dayNode);
}
let ret = {};
ret.MEET_DAYS_SET = getDaysSet;
ret.MEET_QR = meet.MEET_QR;
ret.MEET_TITLE = meet.MEET_TITLE;
ret.MEET_CATE_NAME = meet.MEET_CATE_NAME;
ret.MEET_OBJ = meet.MEET_OBJ;
ret.MEET_ADDRESS = meet.MEET_ADDRESS;
ret.MEET_ADDRESS_GEO = meet.MEET_ADDRESS_GEO;
return ret;
}
async detailForJoin(userId, meetId, timeMark) {
let fields = 'MEET_DAYS_SET,MEET_JOIN_FORMS, MEET_TITLE';
let where = {
_id: meetId,
MEET_STATUS: ['in', [MeetModel.STATUS.COMM, MeetModel.STATUS.OVER]]
};
let day = this.getDayByTimeMark(timeMark);
let meet = await this.getMeetOneDay(meetId, day, where, fields);
if (!meet) return null;
let dayDesc = timeUtil.fmtDateCHN(this.getDaySetByTimeMark(meet, timeMark).day);
let timeSet = this.getTimeSetByTimeMark(meet, timeMark);
let timeDesc = timeSet.start + '~' + timeSet.end;
meet.dayDesc = dayDesc + ' ' + timeDesc;
let whereMy = {
JOIN_USER_ID: userId,
};
let orderByMy = {
JOIN_ADD_TIME: 'desc'
};
let joinMy = await JoinModel.getOne(whereMy, 'JOIN_FORMS', orderByMy);
if (joinMy)
meet.myForms = joinMy.JOIN_FORMS;
else
meet.myForms = [];
return meet;
}
async getMeetListByDay(day) {
let where = {
'meet.MEET_STATUS': ['in', [MeetModel.STATUS.COMM, MeetModel.STATUS.OVER]],
'day': day,
};
let orderBy = {
'MEET_ORDER': 'asc',
'MEET_ADD_TIME': 'desc'
};
let fields = 'meet.MEET_ORDER,meet.MEET_ADD_TIME,meet.MEET_TITLE,meet.MEET_DAYS_SET,meet.MEET_OBJ.cover, DAY_MEET_ID, day, times';
let joinParams = {
from: MeetModel.CL,
localField: 'DAY_MEET_ID',
foreignField: '_id',
as: 'meet',
};
let list = await DayModel.getListJoin(joinParams, where, fields, orderBy, 1, 100, false);
list = list.list;
let retList = [];
for (let k = 0; k < list.length; k++) {
let usefulTimes = [];
for (let j in list[k].times) {
if (list[k].times[j].status != 1) continue;
usefulTimes.push(list[k].times[j]);
}
if (usefulTimes.length == 0) continue;
let node = {};
node.timeDesc = usefulTimes.length > 1 ? usefulTimes.length + ' slots' : usefulTimes[0].start;
node.title = list[k].meet.MEET_TITLE;
node.pic = list[k].meet.MEET_OBJ.cover;
node._id = list[k].DAY_MEET_ID;
retList.push(node);
}
return retList;
}
async getHasDaysFromDay(day) {
let where = {
day: ['>=', day],
};
let fields = 'times,day';
let list = await DayModel.getAllBig(where, fields);
let retList = [];
for (let k = 0; k < list.length; k++) {
for (let n in list[k].times) {
if (list[k].times[n].status == 1) {
retList.push(list[k].day);
break;
}
}
}
return retList;
}
async getMeetList({
search,
sortType,
sortVal,
orderBy,
cateId,
page,
size,
isTotal = true,
oldTotal
}) {
orderBy = orderBy || {
'MEET_ORDER': 'asc',
'MEET_ADD_TIME': 'desc'
};
let fields = 'MEET_ADDRESS,MEET_TITLE,MEET_OBJ,MEET_DAYS,MEET_CATE_NAME,MEET_CATE_ID';
let where = {};
where.and = {
_pid: this.getProjectId()
};
if (cateId && cateId !== '0') where.and.MEET_CATE_ID = cateId;
where.and.MEET_STATUS = ['in', [MeetModel.STATUS.COMM, MeetModel.STATUS.OVER]];
if (util.isDefined(search) && search) {
where.or = [
{ MEET_TITLE: ['like', search] },
];
} else if (sortType && util.isDefined(sortVal)) {
switch (sortType) {
case 'sort': {
orderBy = this.fmtOrderBySort(sortVal, 'NEWS_ADD_TIME');
break;
}
case 'cateId': {
if (sortVal) where.and.MEET_CATE_ID = String(sortVal);
break;
}
}
}
let result = await MeetModel.getList(where, fields, orderBy, page, size, isTotal, oldTotal);
return result;
}
async cancelMyJoin(userId, joinId) {
let where = {
JOIN_USER_ID: userId,
_id: joinId,
JOIN_IS_CHECKIN: 0,
JOIN_STATUS: JoinModel.STATUS.SUCC
};
let join = await JoinModel.getOne(where);
if (!join) {
this.AppError('No cancellable booking found');
}
let whereMeet = {
_id: join.JOIN_MEET_ID,
MEET_STATUS: ['in', [MeetModel.STATUS.COMM, MeetModel.STATUS.OVER]]
};
let meet = await this.getMeetOneDay(join.JOIN_MEET_ID, join.JOIN_MEET_DAY, whereMeet);
if (!meet) this.AppError('Venue not available');
let daySet = this.getDaySetByTimeMark(meet, join.JOIN_MEET_TIME_MARK);
let timeSet = this.getTimeSetByTimeMark(meet, join.JOIN_MEET_TIME_MARK);
if (!timeSet) this.AppError('Time slot not found');
if (meet.MEET_CANCEL_SET == 0)
this.AppError('Cancellation not allowed');
let startT = daySet.day + ' ' + timeSet.start + ':00';
let startTime = timeUtil.time2Timestamp(startT);
let now = timeUtil.time();
if (meet.MEET_CANCEL_SET == 2 && now > startTime)
this.AppError('Too late to cancel');
await JoinModel.del(where);
this.statJoinCnt(join.JOIN_MEET_ID, join.JOIN_MEET_TIME_MARK);
}
async getMyJoinDetail(userId, joinId) {
let fields = 'JOIN_COMPLETE_END_TIME,JOIN_IS_CHECKIN,JOIN_CHECKIN_TIME,JOIN_REASON,JOIN_MEET_ID,JOIN_MEET_TITLE,JOIN_MEET_DAY,JOIN_MEET_TIME_START,JOIN_MEET_TIME_END,JOIN_STATUS,JOIN_ADD_TIME,JOIN_CODE,JOIN_FORMS';
let where = {
_id: joinId,
JOIN_USER_ID: userId
};
return await JoinModel.getOne(where, fields);
}
async getMyJoinList(userId, {
search,
sortType,
sortVal,
orderBy,
page,
size,
isTotal = true,
oldTotal
}) {
orderBy = orderBy || {
'JOIN_ADD_TIME': 'desc'
};
let fields = 'JOIN_COMPLETE_END_TIME,JOIN_IS_CHECKIN,JOIN_REASON,JOIN_MEET_ID,JOIN_MEET_TITLE,JOIN_MEET_DAY,JOIN_MEET_TIME_START,JOIN_MEET_TIME_END,JOIN_STATUS,JOIN_ADD_TIME,JOIN_OBJ';
let where = {
JOIN_USER_ID: userId
};
if (util.isDefined(search) && search) {
where['JOIN_MEET_TITLE'] = {
$regex: '.*' + search,
options: 'i'
};
} else if (sortType) {
switch (sortType) {
case 'cateId': {
if (sortVal) where.JOIN_MEET_CATE_ID = String(sortVal);
break;
}
case 'all': {
break;
}
case 'use': {
where.JOIN_STATUS = JoinModel.STATUS.SUCC;
where.JOIN_COMPLETE_END_TIME = ['>=', timeUtil.time('Y-M-D h:m')];
break;
}
case 'check': {
where.JOIN_STATUS = JoinModel.STATUS.SUCC;
where.JOIN_IS_CHECKIN = 1;
break;
}
case 'timeout': {
where.JOIN_STATUS = JoinModel.STATUS.SUCC;
where.JOIN_IS_CHECKIN = 0;
where.JOIN_COMPLETE_END_TIME = ['<', timeUtil.time('Y-M-D h:m')];
break;
}
case 'succ': {
where.JOIN_STATUS = JoinModel.STATUS.SUCC;
break;
}
case 'cancel': {
where.JOIN_STATUS = ['in', [JoinModel.STATUS.CANCEL, JoinModel.STATUS.ADMIN_CANCEL]];
break;
}
}
}
let result = await JoinModel.getList(where, fields, orderBy, page, size, isTotal, oldTotal);
return result;
}
async getMyJoinSomeday(userId, day) {
let fields = 'JOIN_IS_CHECKIN,JOIN_MEET_ID,JOIN_MEET_TITLE,JOIN_MEET_DAY,JOIN_MEET_TIME_START,JOIN_MEET_TIME_END,JOIN_STATUS,JOIN_ADD_TIME';
let where = {
JOIN_USER_ID: userId,
JOIN_MEET_DAY: day
};
let orderBy = {
'JOIN_MEET_TIME_START': 'asc',
'JOIN_ADD_TIME': 'desc'
};
return await JoinModel.getAll(where, fields, orderBy);
}
}