4 files changed, 86 insertions, 0 deletions
diff --git a/public/src/app/rule-engine/host/exit-mode.enum.ts b/public/src/app/rule-engine/host/exit-mode.enum.ts
new file mode 100644
index 0000000..784ba3b
--- /dev/null
+++ b/public/src/app/rule-engine/host/exit-mode.enum.ts
@@ -0,0 +1,4 @@
+export enum ExitMode {
+  Done,
+  Cancel
+}
diff --git a/public/src/app/rule-engine/host/host-params.ts b/public/src/app/rule-engine/host/host-params.ts
new file mode 100644
index 0000000..f204101
--- /dev/null
+++ b/public/src/app/rule-engine/host/host-params.ts
@@ -0,0 +1,8 @@
+export interface HostParams {
+  readonly vfcmtUuid: string;
+  readonly nodeName: string;
+  readonly nodeId: string;
+  readonly fieldName: string;
+  readonly userId: string;
+  readonly flowType: string;
+}
diff --git a/public/src/app/rule-engine/host/host.service.spec.ts b/public/src/app/rule-engine/host/host.service.spec.ts
new file mode 100644
index 0000000..048be80
--- /dev/null
+++ b/public/src/app/rule-engine/host/host.service.spec.ts
@@ -0,0 +1,18 @@
+import { TestBed, inject } from '@angular/core/testing';
+
+import { HostService } from './host.service';
+
+describe('HostService', () => {
+  beforeEach(() => {
+    TestBed.configureTestingModule({
+      providers: [HostService]
+    });
+  });
+
+  it(
+    'should be created',
+    inject([HostService], (service: HostService) => {
+      expect(service).toBeTruthy();
+    })
+  );
+});
diff --git a/public/src/app/rule-engine/host/host.service.ts b/public/src/app/rule-engine/host/host.service.ts
new file mode 100644
index 0000000..7918d30
--- /dev/null
+++ b/public/src/app/rule-engine/host/host.service.ts
@@ -0,0 +1,56 @@
+import { Injectable } from '@angular/core';
+import { HostParams } from './host-params';
+import { ExitMode } from './exit-mode.enum';
+
+@Injectable()
+export class HostService {
+  /* Public Members */
+
+  public static getParams(): HostParams {
+    return this.getQueryParamsObj(window.location.search) as HostParams;
+  }
+
+  public static enterModifyRule(): void {
+    this.postMessage('modifyRule', null);
+  }
+
+  public static exitModifyRule(): void {
+    this.postMessage('ruleList', null);
+  }
+
+  public static disableLoader(): void {
+    this.postMessage('disable-loader', null);
+  }
+
+  public static exit(mode: ExitMode, data: string): void {
+    if (mode === ExitMode.Cancel) {
+      this.postMessage('exit', null);
+    } else if (mode === ExitMode.Done) {
+      this.postMessage('exit', data);
+    }
+  }
+
+  /* Private Methods */
+
+  private static postMessage(eventName: string, data: string): void {
+    window.parent.postMessage(
+      {
+        type: eventName,
+        data: data
+      },
+      '*'
+    );
+  }
+
+  private static getQueryParamsObj(query: string): object {
+    return query
+      .substring(1) // removes '?' that always appears as prefix to the query-string
+      .split('&') // splits query-string to "key=value" strings
+      .map(p => p.split('=')) // splits each "key=value" string to [key,value] array
+      .reduce((res, p) => {
+        // converts to a dictionary (object) of params
+        res[p[0]] = p[1];
+        return res;
+      }, {});
+  }
+}