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

5 files changed, 196 insertions, 0 deletions

diff --git a/api4/api.go b/api4/api.go
index 4ed636593..a636581d7 100644
--- a/api4/api.go
+++ b/api4/api.go
@@ -81,6 +81,8 @@ type Routes struct {
 
 	System *mux.Router // 'api/v4/system'
 
+	Jobs *mux.Router // 'api/v4/jobs'
+
 	Preferences *mux.Router // 'api/v4/users/{user_id:[A-Za-z0-9]+}/preferences'
 
 	License *mux.Router // 'api/v4/license'
@@ -168,6 +170,7 @@ func InitApi(full bool) {
 	BaseRoutes.License = BaseRoutes.ApiRoot.PathPrefix("/license").Subrouter()
 	BaseRoutes.Public = BaseRoutes.ApiRoot.PathPrefix("/public").Subrouter()
 	BaseRoutes.Reactions = BaseRoutes.ApiRoot.PathPrefix("/reactions").Subrouter()
+	BaseRoutes.Jobs = BaseRoutes.ApiRoot.PathPrefix("/jobs").Subrouter()
 
 	BaseRoutes.Emojis = BaseRoutes.ApiRoot.PathPrefix("/emoji").Subrouter()
 	BaseRoutes.Emoji = BaseRoutes.Emojis.PathPrefix("/{emoji_id:[A-Za-z0-9]+}").Subrouter()
@@ -191,6 +194,7 @@ func InitApi(full bool) {
 	InitCluster()
 	InitLdap()
 	InitBrand()
+	InitJob()
 	InitCommand()
 	InitStatus()
 	InitWebSocket()
diff --git a/api4/context.go b/api4/context.go
index 37af2c6d4..8d4ed7f79 100644
--- a/api4/context.go
+++ b/api4/context.go
@@ -540,3 +540,25 @@ func (c *Context) RequireCommandId() *Context {
 	}
 	return c
 }
+
+func (c *Context) RequireJobId() *Context {
+	if c.Err != nil {
+		return c
+	}
+
+	if len(c.Params.JobId) != 26 {
+		c.SetInvalidUrlParam("job_id")
+	}
+	return c
+}
+
+func (c *Context) RequireJobType() *Context {
+	if c.Err != nil {
+		return c
+	}
+
+	if len(c.Params.JobType) == 0 || len(c.Params.JobType) > 32 {
+		c.SetInvalidUrlParam("job_type")
+	}
+	return c
+}
diff --git a/api4/job.go b/api4/job.go
new file mode 100644
index 000000000..8610d9e74
--- /dev/null
+++ b/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)))
+	}
+}
diff --git a/api4/job_test.go b/api4/job_test.go
new file mode 100644
index 000000000..0f39fc306
--- /dev/null
+++ b/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)
+}
diff --git a/api4/params.go b/api4/params.go
index 785b2267b..aa865fd2a 100644
--- a/api4/params.go
+++ b/api4/params.go
@@ -35,6 +35,8 @@ type ApiParams struct {
 	EmojiName      string
 	Category       string
 	Service        string
+	JobId          string
+	JobType        string
 	Page           int
 	PerPage        int
 }
@@ -116,6 +118,14 @@ func ApiParamsFromRequest(r *http.Request) *ApiParams {
 		params.EmojiName = val
 	}
 
+	if val, ok := props["job_id"]; ok {
+		params.JobId = val
+	}
+
+	if val, ok := props["job_type"]; ok {
+		params.JobType = val
+	}
+
 	if val, err := strconv.Atoi(r.URL.Query().Get("page")); err != nil || val < 0 {
 		params.Page = PAGE_DEFAULT
 	} else {