fix: added timestamp parameters for a date range on the gql queries for

machineLogs, serverLogs and transactions

feat: added optional limit and offset variables for the logs queries,
for filtering and pagination

feat: adapted the LogsDownloaderPopper to download the logs by whats set
on the filters

fix: improved code readability

fix: avoid errors when the range option is selected and no range is
actually selected

lib/new-admin/server-logs.js

@@ -5,12 +5,14 @@ const db = require('../db')
 
 const NUM_RESULTS = 500
 
-function getServerLogs (until = new Date().toISOString()) {
+function getServerLogs (from = new Date(0).toISOString(), until = new Date().toISOString(), limit = null, offset = 0) {
   const sql = `select id, log_level, timestamp, message from server_logs
+  where timestamp >= $1 and timestamp <= $2
   order by timestamp desc
-  limit $1`
+  limit $3
+  offset $4`
 
-  return db.any(sql, [ NUM_RESULTS ])
+  return db.any(sql, [ from, until, limit, offset ])
     .then(_.map(_.mapKeys(_.camelCase)))
 }