Big refactor, split client and server. add weapon get route

src/client/weapons.ts

@@ -0,0 +1,63 @@
+import { Router } from 'express'
+import { param, validationResult } from 'express-validator'
+import cache from '../cache/redis'
+import db from '../db/db'
+const router = Router()
+const { count, max } = db.fn
+
+router.get(
+  '/servers/:serverId/weapons',
+  param('serverId').exists().toInt().isInt(),
+  async (req, res) => {
+    const errors = validationResult(req)
+    if (!errors.isEmpty()) {
+      console.error(JSON.stringify(errors))
+      return res.status(400).json({ errors: errors.array() })
+    }
+    if (!req.params) {
+      res.sendStatus(500)
+      return
+    }
+    const server = Number(req.params.serverId)
+    await processTopWeapons(server)
+    const data = await cache.HGETALL(`servers:${server}:weapons`)
+    delete data.last_entry
+    res.status(200).send(data)
+  }
+)
+
+async function processTopWeapons(server: number) {
+  let last_entry =
+    Number(await cache.HGET(`servers:${server}:weapons`, 'last_entry')) || 0
+  const newData = await db
+    .selectFrom(['kill'])
+    .select([
+      count<number>('kill.id').as('num_kills'),
+      'kill.cause_of_death',
+      max('kill.id').as('last_entry')
+    ])
+    .where('server', '=', server)
+    .where('kill.id', '>', last_entry)
+    .groupBy('cause_of_death')
+    .execute()
+  //if no new kills
+  if (newData.length == 0) {
+    return
+  }
+  last_entry = newData.reduce(
+    (acc, current) => (current.last_entry > acc ? current.last_entry : acc),
+    0
+  )
+  const promises: Promise<number>[] = []
+  newData.forEach(({ num_kills, cause_of_death }) => {
+    promises.push(
+      cache.HINCRBY(`servers:${server}:weapons`, cause_of_death, num_kills)
+    )
+  })
+  promises.push(
+    cache.HSET(`servers:${server}:weapons`, 'last_entry', newData[0].last_entry)
+  )
+  await Promise.all(promises)
+}
+
+export default router