PLT-6408 Framework for job server (#6404)

* Added initial job server

* Added job server to be ran as part of platform

* Added test job to the enterprise repo

* Fixed job server not loading license

* Renamed job package to jobs

* Fixed TE not being buildable

* Added JobStatus table to database

* Changed fields used by JobStatus

* Added APIs to query job status

* Added config change listener to server

* Added option to run job server from Makefile

* Added ability to enable/disable jobs from config

* Commented out placeholder for search indexing job

* Fixed govet

* Removed debug messages and fixed job api init message

api4/job_test.go

@@ -0,0 +1,103 @@
+// Copyright (c) 2017-present Mattermost, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+package api4
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/mattermost/platform/app"
+	"github.com/mattermost/platform/model"
+	"github.com/mattermost/platform/store"
+)
+
+func TestGetJobStatus(t *testing.T) {
+	th := Setup().InitBasic().InitSystemAdmin()
+	defer TearDown()
+
+	status := &model.JobStatus{
+		Id:     model.NewId(),
+		Status: model.NewId(),
+	}
+	if result := <-app.Srv.Store.JobStatus().SaveOrUpdate(status); result.Err != nil {
+		t.Fatal(result.Err)
+	}
+
+	defer app.Srv.Store.JobStatus().Delete(status.Id)
+
+	received, resp := th.SystemAdminClient.GetJobStatus(status.Id)
+	CheckNoError(t, resp)
+
+	if received.Id != status.Id || received.Status != status.Status {
+		t.Fatal("incorrect job status received")
+	}
+
+	_, resp = th.SystemAdminClient.GetJobStatus("1234")
+	CheckBadRequestStatus(t, resp)
+
+	_, resp = th.Client.GetJobStatus(status.Id)
+	CheckForbiddenStatus(t, resp)
+
+	_, resp = th.SystemAdminClient.GetJobStatus(model.NewId())
+	CheckNotFoundStatus(t, resp)
+}
+
+func TestGetJobStatusesByType(t *testing.T) {
+	th := Setup().InitBasic().InitSystemAdmin()
+	defer TearDown()
+
+	jobType := model.NewId()
+
+	statuses := []*model.JobStatus{
+		{
+			Id:      model.NewId(),
+			Type:    jobType,
+			StartAt: 1000,
+		},
+		{
+			Id:      model.NewId(),
+			Type:    jobType,
+			StartAt: 999,
+		},
+		{
+			Id:      model.NewId(),
+			Type:    jobType,
+			StartAt: 1001,
+		},
+	}
+
+	for _, status := range statuses {
+		store.Must(app.Srv.Store.JobStatus().SaveOrUpdate(status))
+		defer app.Srv.Store.JobStatus().Delete(status.Id)
+	}
+
+	received, resp := th.SystemAdminClient.GetJobStatusesByType(jobType, 0, 2)
+	CheckNoError(t, resp)
+
+	if len(received) != 2 {
+		t.Fatal("received wrong number of statuses")
+	} else if received[0].Id != statuses[1].Id {
+		t.Fatal("should've received newest job first")
+	} else if received[1].Id != statuses[0].Id {
+		t.Fatal("should've received second newest job second")
+	}
+
+	received, resp = th.SystemAdminClient.GetJobStatusesByType(jobType, 1, 2)
+	CheckNoError(t, resp)
+
+	if len(received) != 1 {
+		t.Fatal("received wrong number of statuses")
+	} else if received[0].Id != statuses[2].Id {
+		t.Fatal("should've received oldest job last")
+	}
+
+	_, resp = th.SystemAdminClient.GetJobStatusesByType("", 0, 60)
+	CheckNotFoundStatus(t, resp)
+
+	_, resp = th.SystemAdminClient.GetJobStatusesByType(strings.Repeat("a", 33), 0, 60)
+	CheckBadRequestStatus(t, resp)
+
+	_, resp = th.Client.GetJobStatusesByType(jobType, 0, 60)
+	CheckForbiddenStatus(t, resp)
+}