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.go

@@ -0,0 +1,57 @@
+// Copyright (c) 2017-present Mattermost, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+package api4
+
+import (
+	"net/http"
+
+	l4g "github.com/alecthomas/log4go"
+	"github.com/mattermost/platform/app"
+	"github.com/mattermost/platform/model"
+)
+
+func InitJob() {
+	l4g.Info("Initializing job API routes")
+
+	BaseRoutes.Jobs.Handle("/type/{job_type:[A-Za-z0-9_-]+}/statuses", ApiSessionRequired(getJobStatusesByType)).Methods("GET")
+	BaseRoutes.Jobs.Handle("/{job_id:[A-Za-z0-9]+}/status", ApiSessionRequired(getJobStatus)).Methods("GET")
+}
+
+func getJobStatus(c *Context, w http.ResponseWriter, r *http.Request) {
+	c.RequireJobId()
+	if c.Err != nil {
+		return
+	}
+
+	if !app.SessionHasPermissionTo(c.Session, model.PERMISSION_MANAGE_SYSTEM) {
+		c.SetPermissionError(model.PERMISSION_MANAGE_SYSTEM)
+		return
+	}
+
+	if status, err := app.GetJobStatus(c.Params.JobId); err != nil {
+		c.Err = err
+		return
+	} else {
+		w.Write([]byte(status.ToJson()))
+	}
+}
+
+func getJobStatusesByType(c *Context, w http.ResponseWriter, r *http.Request) {
+	c.RequireJobType()
+	if c.Err != nil {
+		return
+	}
+
+	if !app.SessionHasPermissionTo(c.Session, model.PERMISSION_MANAGE_SYSTEM) {
+		c.SetPermissionError(model.PERMISSION_MANAGE_SYSTEM)
+		return
+	}
+
+	if statuses, err := app.GetJobStatusesByTypePage(c.Params.JobType, c.Params.Page, c.Params.PerPage); err != nil {
+		c.Err = err
+		return
+	} else {
+		w.Write([]byte(model.JobStatusesToJson(statuses)))
+	}
+}