feat(api,ui): add workflow template usage

engine/api/api_routes.go

@@ -447,6 +447,7 @@ func (api *API) InitRouter() {
 	r.Handle("/template/{groupName}/{templateSlug}/apply", r.POST(api.applyTemplateHandler))
 	r.Handle("/template/{groupName}/{templateSlug}/instance", r.GET(api.getTemplateInstancesHandler))
 	r.Handle("/template/{groupName}/{templateSlug}/audit", r.GET(api.getTemplateAuditsHandler))
+	r.Handle("/template/{groupName}/{templateSlug}/usage", r.GET(api.getTemplateUsageHandler))
 	r.Handle("/project/{key}/workflow/{permWorkflowName}/templateInstance", r.GET(api.getTemplateInstanceHandler))
 
 	//Not Found handler

engine/api/templates.go

@@ -583,3 +583,20 @@ func (api *API) getTemplateAuditsHandler() service.Handler {
 		return service.WriteJSON(w, as, http.StatusOK)
 	}
 }
+
+func (api *API) getTemplateUsageHandler() service.Handler {
+	return func(ctx context.Context, w http.ResponseWriter, r *http.Request) error {
+		ctx, err := api.middlewareTemplate(false)(ctx, w, r)
+		if err != nil {
+			return err
+		}
+		wfTmpl := getWorkflowTemplate(ctx)
+
+		wfs, err := workflow.LoadByWorkflowTemplateID(ctx, api.mustDB(), wfTmpl.ID)
+		if err != nil {
+			return sdk.WrapError(err, "Cannot load templates")
+		}
+
+		return service.WriteJSON(w, wfs, http.StatusOK)
+	}
+}

engine/api/workflow/dao.go

@@ -409,6 +409,35 @@ func LoadByEnvName(db gorp.SqlExecutor, projectKey string, envName string) ([]sd
 	return res, nil
 }
 
+// LoadByWorkflowTemplateID load all workflows linked to a workflow template but without loading workflow details
+func LoadByWorkflowTemplateID(ctx context.Context, db gorp.SqlExecutor, templateID int64) ([]sdk.Workflow, error) {
+	var dbRes []Workflow
+	query := `
+	SELECT workflow.*
+		FROM workflow
+			JOIN workflow_template_instance ON workflow_template_instance.workflow_id = workflow.id
+		WHERE workflow_template_instance.workflow_template_id = $1 AND workflow.to_delete = false
+	`
+	if _, err := db.Select(&dbRes, query, templateID); err != nil {
+		if err == sql.ErrNoRows {
+			return nil, nil
+		}
+		return nil, err
+	}
+
+	workflows := make([]sdk.Workflow, len(dbRes))
+	for i, wf := range dbRes {
+		var err error
+		wf.ProjectKey, err = db.SelectStr("SELECT projectkey FROM project WHERE id = $1", wf.ProjectID)
+		if err != nil {
+			return nil, sdk.WrapError(err, "cannot load project key for workflow %s and project_id %d", wf.Name, wf.ProjectID)
+		}
+		workflows[i] = sdk.Workflow(wf)
+	}
+
+	return workflows, nil
+}
+
 func load(ctx context.Context, db gorp.SqlExecutor, store cache.Store, proj *sdk.Project, opts LoadOptions, u *sdk.User, query string, args ...interface{}) (*sdk.Workflow, error) {
 	t0 := time.Now()
 	dbRes := Workflow{}

ui/src/app/service/workflow-template/workflow-template.service.ts

@@ -9,6 +9,7 @@ import {
     WorkflowTemplateInstance,
     WorkflowTemplateRequest
 } from '../../model/workflow-template.model';
+import { Workflow } from '../../model/workflow.model';
 
 @Injectable()
 export class WorkflowTemplateService {
@@ -54,4 +55,8 @@ export class WorkflowTemplateService {
         let url = '/template/' + groupName + '/' + templateSlug + '/audit' + (version ? '?sinceVersion=' + version : '');
         return this._http.get<Array<AuditWorkflowTemplate>>(url);
     }
+
+    getWorkflowTemplateUsage(groupName: string, templateSlug: string): Observable<Array<Workflow>> {
+        return this._http.get<Array<Workflow>>('/template/' + groupName + '/' + templateSlug + '/usage');
+    }
 }

ui/src/app/shared/usage/workflows/usage.workflows.html

@@ -4,7 +4,12 @@ <h3><i class="share alternate icon"></i> {{'usage_workflow_list' | translate}}</
     <ng-template #workflowsDisplay>
         <div class="ui stackable four column grid">
             <div class="center aligned column" *ngFor="let workflow of workflows">
-                <a [routerLink]="['/project', project.key, 'workflow', workflow.name]">{{workflow.name}}</a>
+                <ng-container *ngIf="project">
+                    <a [routerLink]="['/project', project.key, 'workflow', workflow.name]">{{workflow.name}}</a>
+                </ng-container>
+                <ng-container *ngIf="!project">
+                    <a [routerLink]="['/project', workflow.project_key, 'workflow', workflow.name]">{{workflow.name}}</a>
+                </ng-container>
             </div>
         </div>
     </ng-template>

ui/src/app/views/settings/workflow-template/edit/workflow-template.edit.component.ts

@@ -2,9 +2,11 @@ import { Component, OnInit } from '@angular/core';
 import { ActivatedRoute, Router } from '@angular/router';
 import { TranslateService } from '@ngx-translate/core';
 import { finalize } from 'rxjs/internal/operators/finalize';
+import { first } from 'rxjs/operators';
 import { AuditWorkflowTemplate } from '../../../../model/audit.model';
 import { Group } from '../../../../model/group.model';
 import { WorkflowTemplate } from '../../../../model/workflow-template.model';
+import { Workflow } from '../../../../model/workflow.model';
 import { GroupService } from '../../../../service/services.module';
 import { WorkflowTemplateService } from '../../../../service/workflow-template/workflow-template.service';
 import { PathItem } from '../../../../shared/breadcrumb/breadcrumb.component';
@@ -24,13 +26,17 @@ export class WorkflowTemplateEditComponent implements OnInit {
     workflowTemplate: WorkflowTemplate;
     groups: Array<Group>;
     audits: Array<AuditWorkflowTemplate>;
+    workflowsLinked: Array<Workflow>;
     loading: boolean;
     loadingAudits: boolean;
+    loadingUsage: boolean;
     path: Array<PathItem>;
     tabs: Array<Tab>;
     selectedTab: Tab;
     columns: Array<Column>;
     diffItems: Array<Item>;
+    groupName: string;
+    templateSlug: string;
 
     constructor(
         private _workflowTemplateService: WorkflowTemplateService,
@@ -51,6 +57,10 @@ export class WorkflowTemplateEditComponent implements OnInit {
             translate: 'common_audit',
             icon: 'history',
             key: 'audits'
+        }, <Tab>{
+            translate: 'common_usage',
+            icon: 'map signs',
+            key: 'usage'
         }];
 
         this.columns = [
@@ -79,10 +89,10 @@ export class WorkflowTemplateEditComponent implements OnInit {
         ];
 
         this._route.params.subscribe(params => {
-            const groupName = params['groupName'];
-            const templateSlug = params['templateSlug'];
-            this.getTemplate(groupName, templateSlug);
-            this.getAudits(groupName, templateSlug);
+            this.groupName = params['groupName'];
+            this.templateSlug = params['templateSlug'];
+            this.getTemplate(this.groupName, this.templateSlug);
+            this.getAudits(this.groupName, this.templateSlug);
         });
 
         this.getGroups();
@@ -160,6 +170,9 @@ export class WorkflowTemplateEditComponent implements OnInit {
     }
 
     selectTab(tab: Tab): void {
+        if (tab.key === 'usage') {
+            this.getUsage();
+        }
         this.selectedTab = tab;
     }
 
@@ -192,4 +205,15 @@ export class WorkflowTemplateEditComponent implements OnInit {
         }
         this.saveWorkflowTemplate();
     }
+
+    getUsage() {
+        if (this.workflowsLinked) {
+            return;
+        }
+        this.loadingUsage = true;
+        this._workflowTemplateService.getWorkflowTemplateUsage(this.groupName, this.templateSlug)
+            .pipe(first())
+            .pipe(finalize(() => this.loadingUsage = false))
+            .subscribe((workflows) => this.workflowsLinked = workflows);
+    }
 }

ui/src/app/views/settings/workflow-template/edit/workflow-template.edit.html

@@ -32,5 +32,13 @@ <h3>{{ "common_last_modified" | translate }}</h3>
                 <app-diff-list *ngIf="diffItems" [items]="diffItems"></app-diff-list>
             </div>
         </div>
+        <div *ngSwitchCase="'usage'" class="ui grid">
+            <div class="sixteen wide column">
+                <div class="ui active centered inline loader" *ngIf="loadingUsage"></div>
+                <ng-container *ngIf="!loadingUsage">
+                    <app-usage [workflows]="workflowsLinked"></app-usage>
+                </ng-container>
+            </div>
+        </div>
     </app-scrollview>
 </div>