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| 1 | +const redis = require('redis') |
| 2 | +const subDays = require('date-fns/sub_days') |
| 3 | +const prettyBytes = require('pretty-bytes') |
| 4 | +const invariant = require('invariant') |
| 5 | + |
| 6 | +const RedisURL = process.env.REDIS_URL |
| 7 | + |
| 8 | +invariant( |
| 9 | + RedisURL, |
| 10 | + 'Missing the $REDIS_URL environment variable' |
| 11 | +) |
| 12 | + |
| 13 | +const db = redis.createClient(RedisURL) |
| 14 | + |
| 15 | +const getKeyValues = (keys) => |
| 16 | + new Promise((resolve, reject) => { |
| 17 | + db.mget(keys, (error, values) => { |
| 18 | + if (error) { |
| 19 | + reject(error) |
| 20 | + } else { |
| 21 | + resolve(values) |
| 22 | + } |
| 23 | + }) |
| 24 | + }) |
| 25 | + |
| 26 | +const sumKeys = (keys) => getKeyValues(keys).then(sumValues) |
| 27 | + |
| 28 | +const createRange = (start, end) => { |
| 29 | + const range = [] |
| 30 | + |
| 31 | + while (start < end) |
| 32 | + range.push(start++) |
| 33 | + |
| 34 | + return range |
| 35 | +} |
| 36 | + |
| 37 | +const createDayKey = (date) => |
| 38 | + `${date.getUTCFullYear()}-${date.getUTCMonth()}-${date.getUTCDate()}` |
| 39 | + |
| 40 | +const createHourKey = (date) => |
| 41 | + `${createDayKey(date)}-${date.getUTCHours()}` |
| 42 | + |
| 43 | +const sumValues = (array) => |
| 44 | + array.reduce((memo, n) => memo + (parseInt(n, 10) || 0), 0) |
| 45 | + |
| 46 | +const now = new Date |
| 47 | + |
| 48 | +const createPastDays = (n) => |
| 49 | + createRange(1, n + 1).map(days => subDays(now, days)).reverse() |
| 50 | + |
| 51 | +const pastSevenDays = createPastDays(7) |
| 52 | +const pastThirtyDays = createPastDays(30) |
| 53 | + |
| 54 | +sumKeys( |
| 55 | + pastSevenDays.map(date => `stats-requests-${createHourKey(date)}`) |
| 56 | +).then(total => { |
| 57 | + console.log( |
| 58 | + 'Requests this week: %s', |
| 59 | + total.toLocaleString() |
| 60 | + ) |
| 61 | +}) |
| 62 | + |
| 63 | +sumKeys( |
| 64 | + pastSevenDays.map(date => `stats-bandwidth-${createHourKey(date)}`) |
| 65 | +).then(total => { |
| 66 | + console.log( |
| 67 | + 'Bandwidth this week: %s', |
| 68 | + prettyBytes(total) |
| 69 | + ) |
| 70 | +}) |
| 71 | + |
| 72 | +sumKeys( |
| 73 | + pastThirtyDays.map(date => `stats-requests-${createDayKey(date)}`) |
| 74 | +).then(total => { |
| 75 | + console.log( |
| 76 | + 'Requests this month: %s', |
| 77 | + total.toLocaleString() |
| 78 | + ) |
| 79 | +}) |
| 80 | + |
| 81 | +sumKeys( |
| 82 | + pastThirtyDays.map(date => `stats-bandwidth-${createDayKey(date)}`) |
| 83 | +).then(total => { |
| 84 | + console.log( |
| 85 | + 'Bandwidth this month: %s', |
| 86 | + prettyBytes(total) |
| 87 | + ) |
| 88 | +}) |
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