Don't use legacy method to send Matrix Webhook (#12348)

* Don't use legacy send for messages

* Add migrations to ensure Matrix webhooks use PUT

* Set HTTP method to PUT as default

* Fix sql condition..

Signed-off-by: Till Faelligen <tfaelligen@gmail.com>

* Rename getTxnID -> getMatrixTxnID

* Use local variable instead of constant value

Co-authored-by: techknowlogick <techknowlogick@gitea.io>

modules/webhook/matrix_test.go

@@ -154,3 +154,32 @@ func TestMatrixHookRequest(t *testing.T) {
 	assert.Equal(t, "Bearer dummy_access_token", req.Header.Get("Authorization"))
 	assert.Equal(t, wantPayloadContent, h.PayloadContent)
 }
+
+func Test_getTxnID(t *testing.T) {
+	type args struct {
+		payload []byte
+	}
+	tests := []struct {
+		name    string
+		args    args
+		want    string
+		wantErr bool
+	}{
+		{
+			name:    "dummy payload",
+			args:    args{payload: []byte("Hello World")},
+			want:    "0a4d55a8d778e5022fab701977c5d840bbc486d0",
+			wantErr: false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, err := getMatrixTxnID(tt.args.payload)
+			if (err != nil) != tt.wantErr {
+				t.Errorf("getMatrixTxnID() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+			assert.Equal(t, tt.want, got)
+		})
+	}
+}