1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 | 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 5x 5x 4x 4x 2x 2x 2x 2x 1x 1x 1x 1x 6x 6x 6x 6x 6x 6x 5x 3x 3x 3x 3x 3x 3x 3x 3x 2x 1x 1x 1x 1x 1x 9x 9x 9x 9x 9x 8x 8x 8x 1x 1x 1x 9x 9x 9x 6x 6x 6x 9x | /** * Module Dependencies */ const Custom = require('custom-error-instance') const log = require('loo')('itty-postgres') const template = require('colon-template') const Environment = require('envobj') const exp = require('./exp') const pg = require('pg') /** * Postgres Error */ const PostgresError = Custom('PostgresError') /** * Environment Variables */ const env = Environment({ POSTGRES_URL: String }) /** * Exports */ module.exports = exp({ multi, query, one, raw }) /** * Run multiple commands with one client */ function * multi (fn) { const client = yield connect() let ret = yield fn({ query: queryAll(client), one: queryOne(client), raw: queryRaw(client) }) yield disconnect(client) return ret } /** * Query */ function * query (query, params) { const client = yield connect() const ret = yield queryAll(client)(query, params) yield disconnect(client) return ret } /** * One */ function * one (query, params) { const client = yield connect() const ret = yield queryOne(client)(query, params) yield disconnect(client) return ret } /** * Raw */ function * raw (query) { const client = yield connect() const ret = yield queryRaw(client)(query) yield disconnect(client) return ret } /** * Query All */ function queryAll (client) { return function (query, params) { return new Promise((resolve, reject) => { query = prepare(query, params) log('query').info(query, params) client.query(query, function (err, data) { if (err) return reject(error(err, query)) resolve(data.rows || []) }) }) } } /** * Query One */ function queryOne (client) { return function (query, params) { return new Promise((resolve, reject) => { query = prepare(query, params) log('one').info(query, params) client.query(query, function (err, data) { Iif (err) return reject(error(err, query)) const rows = data.rows resolve(rows && rows.length ? rows[0] : null) }) }) } } /** * Query Raw */ function queryRaw (client) { return function (query) { return new Promise((resolve, reject) => { log('raw').info(query) client.query(query, function (err, data) { Iif (err) return reject(error(err, query)) resolve(data.rows || []) }) }) } } /** * Connect */ function connect (url) { url = url || env.POSTGRES_URL return function (fn) { const client = new pg.Client(url) client.connect(fn) return client } } /** * Disconnect the client */ function disconnect (client) { return function (fn) { client.end() client.once('end', fn) } } /** * Create an Error * * @param {Error} err * @param {Object} query */ function error (err, query) { let code = query.text ? query.text : query code = code.trim ? code.trim() : code return new PostgresError({ message: err.message, code: code }) } /** * Prepare a query * * @param {String} query * @param {Object} params * @return {Object} */ function prepare (query, params) { params = params || {} var values = [] params = Object.keys(params || {}).reduce(function (params, key, i) { values.push(params[key]) params[key] = '$' + (i + 1) return params }, params) return { text: template(query, params), values: values } } |