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db-parser.js
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db-parser.js
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const Datastore = require('nedb'), db = {};
//initalize db collection
const init = function (collection) {
if (db[collection]) { //check if file is opened
return db[collection];
} else {
db[collection] = new Datastore({ filename: 'db/' + collection + '.db', autoload: true });
return db[collection];
}
}
//save unique users
const saveUser = (user) => new Promise((resolve, reject) => {
const userDb = init('users');
userDb.ensureIndex({ fieldName: 'userId', unique: true });
let u = {};
u.name = user.username;
u.username = user.first_name;
u.userId = user.id;
userDb.insert(u, function (err, doc) {
return resolve(userDb);
});
});
//save user search history
const updateUserSearchData = (user, action, keyword) => new Promise((resolve, reject) => {
saveUser(user).then(function (userModel) {
userModel.update({ userId: user.id }, {
$push: { searches: { action: action, date: new Date, keyword: keyword } }
}, {}, function () {
resolve({ status: true });
});
}).catch(function (err) {
console.log(err);
resolve();
});
});
//save music to user play history
const updateUserPlayData = (user, musicId, url) => new Promise((resolve, reject) => {
saveUser(user).then(function (userModel) {
userModel.update({ userId: user.id }, {
$push: { plays: { musicId: musicId, date: new Date, url: url } }
}, {}, function () {
resolve({ status: true });
});
}).catch(function (err) {
console.log(err);
resolve();
});
});
//show list of saved users
const showDb = (user, musicId, url) => new Promise((resolve, reject) => {
const userDb = init('users');
userDb.find({}, function (err, docs) {
let users = [];
if (docs) {
for (let i = 0, l = docs.length; i < l; i++) {
users[users.length] = {
data: docs[i],
search_length: docs[i].searches ? docs[i].searches.length : 0,
play_length: docs[i].plays ? docs[i].plays.length : 0
};
}
}
console.log(users)
return resolve(users);
});
});
module.exports = {
saveUser: saveUser,
updateUserSearchData: updateUserSearchData,
updateUserPlayData: updateUserPlayData,
showDb: showDb
}