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/logs.js

@@ -81,28 +81,31 @@ function getUnlimitedMachineLogs (deviceId, until = new Date().toISOString()) {
     }))
 }
 
-function getMachineLogs (deviceId, until = new Date().toISOString()) {
+function getMachineLogs (deviceId, until = new Date().toISOString(), limit = null, offset = 0) {
   const sql = `select id, log_level, timestamp, message from logs
   where device_id=$1
-  and timestamp <= $3
+  and timestamp <= $2
   order by timestamp desc, serial desc
-  limit $2`
+  limit $3
+  offset $4`
 
-  return Promise.all([db.any(sql, [ deviceId, NUM_RESULTS, until ]), getMachineName(deviceId)])
+  return Promise.all([db.any(sql, [ deviceId, until, limit, offset ]), getMachineName(deviceId)])
     .then(([logs, machineName]) => ({
       logs: _.map(_.mapKeys(_.camelCase), logs),
       currentMachine: {deviceId, name: machineName}
     }))
 }
 
-function simpleGetMachineLogs (deviceId, until = new Date().toISOString()) {
+function simpleGetMachineLogs (deviceId, from = new Date(0).toISOString(), until = new Date().toISOString(), limit = null, offset = 0) {
   const sql = `select id, log_level, timestamp, message from logs
   where device_id=$1
+  and timestamp >= $2
   and timestamp <= $3
   order by timestamp desc, serial desc
-  limit $2`
+  limit $4
+  offset $5`
 
-  return db.any(sql, [ deviceId, NUM_RESULTS, until ])
+  return db.any(sql, [ deviceId, from, until, limit, offset ])
     .then(_.map(_.mapKeys(_.camelCase)))
 }