63 lines
1.8 KiB
JavaScript
63 lines
1.8 KiB
JavaScript
const db = require('./db')
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function getInsertQuery (tableName, fields) {
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// outputs string like: '$1, $2, $3...' with proper No of items
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const placeholders = fields.map(function (_, i) {
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return '$' + (i + 1)
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}).join(', ')
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const query = 'INSERT INTO ' + tableName +
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' (' + fields.join(', ') + ')' +
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' VALUES' +
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' (' + placeholders + ')'
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return query
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}
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exports.recordDeviceEvent = function recordDeviceEvent (deviceId, event) {
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const sql = 'INSERT INTO device_events (device_id, event_type, ' +
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'note, device_time) VALUES ($1, $2, $3, $4)'
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const values = [deviceId, event.eventType, event.note,
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event.deviceTime]
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return db.none(sql, values)
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}
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exports.cartridgeCounts = function cartridgeCounts (deviceId) {
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const sql = 'SELECT cassette1, cassette2 FROM devices ' +
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'WHERE device_id=$1'
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return db.one(sql, [deviceId])
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.then(row => {
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const counts = [row.cassette1, row.cassette2]
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return {counts}
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})
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}
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// Note: since we only prune on insert, we'll always have
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// last known state.
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exports.machineEvent = function machineEvent (rec) {
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const fields = ['id', 'device_id', 'event_type', 'note', 'device_time']
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const sql = getInsertQuery('machine_events', fields)
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const values = [rec.id, rec.deviceId, rec.eventType, rec.note, rec.deviceTime]
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const deleteSql = `delete from machine_events
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where device_id=$1
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and event_type=$2
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and created < now() - interval '2 hours'`
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return db.none(sql, values)
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.then(() => db.none(deleteSql, [rec.deviceId, rec.eventType]))
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}
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exports.devices = function devices () {
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const sql = 'SELECT device_id, name FROM devices'
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return db.any(sql)
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}
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exports.machineEvents = function machineEvents () {
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const sql = 'SELECT *, (EXTRACT(EPOCH FROM (now() - created))) * 1000 AS age FROM machine_events'
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return db.any(sql, [])
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}
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