Sharing a request with yourself shows a misleading error message (#280)

* feat: improve error message when sharing a request with yourself

* chore: pr changes

* chore: pr changes

* chore: fix prettier

* test: add test for new error item

* chore: correct error code

---------

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

Author: sebbi08

packages/consumption/src/consumption/ConsumptionCoreErrors.ts

@@ -310,6 +310,10 @@ class Requests {
         return new ApplicationError("error.consumption.requests.validation.inheritedFromItem", message);
     }
 
+    public cannotShareRequestWithYourself() {
+        return new CoreError("error.consumption.requests.cannotShareRequestWithYourself", "You cannot share a Request with yourself.");
+    }
+
     private static readonly _decideValidation = class {
         public invalidNumberOfItems(message: string) {
             return new ApplicationError("error.consumption.requests.decide.validation.invalidNumberOfItems", message);

packages/consumption/src/modules/requests/outgoing/OutgoingRequestsController.ts

@@ -40,6 +40,11 @@ export class OutgoingRequestsController extends ConsumptionBaseController {
 
     public async canCreate(params: ICanCreateOutgoingRequestParameters): Promise<ValidationResult> {
         const parsedParams = CanCreateOutgoingRequestParameters.from(params);
+
+        if (parsedParams.peer?.equals(this.identity.address)) {
+            return ValidationResult.error(ConsumptionCoreErrors.requests.cannotShareRequestWithYourself());
+        }
+
         if (parsedParams.peer) {
             const relationship = await this.relationshipResolver.getRelationshipToIdentity(parsedParams.peer);
 

packages/consumption/test/modules/requests/OutgoingRequestsController.test.ts

@@ -198,6 +198,32 @@ describe("OutgoingRequestsController", function () {
             expect(validationResult.items[1].items).toHaveLength(1);
             expect(validationResult.items[1].items[0].isError()).toBe(true);
         });
+
+        test("returns a validation result that contains an error for requests to myself", async function () {
+            const validationResult = await When.iCallCanCreateForAnOutgoingRequest({
+                content: {
+                    items: [
+                        TestRequestItem.from({
+                            mustBeAccepted: false
+                        }),
+                        RequestItemGroup.from({
+                            items: [
+                                TestRequestItem.from({
+                                    mustBeAccepted: false,
+                                    shouldFailAtCanCreateOutgoingRequestItem: true
+                                })
+                            ]
+                        })
+                    ]
+                },
+                peer: context.currentIdentity.address
+            });
+
+            expect(validationResult).errorValidationResult({
+                code: "error.consumption.requests.cannotShareRequestWithYourself",
+                message: "You cannot share a Request with yourself."
+            });
+        });
     });
 
     describe("Create (on active relationship)", function () {