forked from IvanVergiliev/democracy
/
group.js
146 lines (133 loc) · 3.89 KB
/
group.js
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var async = require('async');
var mongoose = require('mongoose');
var Enrollment = require('./enrollment.js');
var QueueEntry = require('./queue_entry.js');
var groupSchema = new mongoose.Schema({
name: String,
maxEntries: Number,
_user: {
type: mongoose.Schema.Types.ObjectId,
ref: 'User'
}
});
groupSchema.methods.fix = function (cb) {
Enrollment
.find({_group: this._id})
.exists('endDate', false)
.populate("_queueEntry")
.exec(function(err, enrollments) {
var count = enrollments.length;
if (count > this.maxEntries) {
var enrollment = enrollments[0];
for (var i = 1; i < enrollments.length; i++) {
if (enrollments[i]._queryEntry.priority < enrollment.priority) {
enrollment = enrollments[i]._queryEntry;
}
}
enrollment.endDate = Date.now();
enrollment.save();
}
if (count >= this.maxEntries) {
minPriority = this.maxEntries;
for (var j in enrollments) {
if (enrollments[j].endDate) {
minPriority = Math.min(minPriority, enrollments[j]._queryEntry.priority);
}
}
QueueEntry.find( {_group: this._id}, function(err, entries) {
entries.forEach(function(entry) {
if (entry.priority < minPriority) {
entry.valid = false;
} else {
entry.valid = true;
}
entry.save();
});
});
}
cb();
});
};
groupSchema.methods.addEnrollment = function (courseId, cb) {
console.log('course id is ');
console.log(courseId);
var enrollment = new Enrollment({
startDate: Date.now(),
_group: this._id,
_course: courseId
});
enrollment.save(cb);
};
groupSchema.methods.addQueueEntry = function(courseId, cb) {
var queueEntry = new QueueEntry({
priority: 1,
created: Date.now(),
valid: true,
_group: this._id,
_course: courseId
});
queueEntry.save(cb);
};
groupSchema.methods.getActiveEnrollment_SingleGroup = function (courseId, cb) {
var group = this;
Enrollment.forGroup(this, function (err, enrollments) {
async.reduce(enrollments, null, function (memo, item, callback) {
if (!item.endDate && item._course._id.toString() == courseId) {
memo = item;
}
callback(null, memo);
}, function (err, result) {
cb(result);
});
});
};
groupSchema.statics.getActiveEnrollment = function (user, courseId, cb) {
Group.find({_user: user._id}, function (err, groups) {
async.reduce(groups, null, function (memo, item, callback) {
item.getActiveEnrollment_SingleGroup(courseId, function (result) {
if (result !== null) {
memo = result;
}
callback(null, memo);
});
}, function (err, result) {
cb(result);
});
});
};
groupSchema.methods.getQueueEntry_SingleGoup = function (courseId, cb) {
var group = this;
QueueEntry.findOne({_course: courseId, _group: group._id, valid: true},
function(err, result) {
cb(result);
});
};
groupSchema.statics.getQueueEntry = function (userId, courseId, cb) {
Group.find({_user: userId}, function (err, groups) {
async.reduce(groups, null, function (memo, item, callback) {
item.getQueueEntry_SingleGoup(courseId, function (result) {
if (result !== null) {
memo = result;
}
callback(null, memo);
});
}, function (err, result) {
cb(result);
});
});
};
groupSchema.statics.getWithEnrollments = function (userId, callback) {
Group.find(
{ _user: userId },
function (err, groups) {
console.log(groups);
async.map(groups, function (group, cb) {
Enrollment.forGroup(group, function (err, enrollments) {
group.enrollments = enrollments;
cb(null, group);
});
}, callback);
});
};
var Group = mongoose.model('Group', groupSchema);
module.exports = Group;