PLT-7684 Add support to outgoing webhooks and slash commands to set post type and props (#7531)

* Add support to outgoing webhooks and slash commands to set post type and props

* Fix nil access

model/command_response.go

@@ -20,6 +20,8 @@ type CommandResponse struct {
 	Text         string             `json:"text"`
 	Username     string             `json:"username"`
 	IconURL      string             `json:"icon_url"`
+	Type         string             `json:"type"`
+	Props        StringInterface    `json:"props"`
 	GotoLocation string             `json:"goto_location"`
 	Attachments  []*SlackAttachment `json:"attachments"`
 }

model/outgoing_webhook.go

@@ -45,6 +45,14 @@ type OutgoingWebhookPayload struct {
 	FileIds     string `json:"file_ids"`
 }
 
+type OutgoingWebhookResponse struct {
+	Text     *string         `json:"text"`
+	Username string          `json:"username"`
+	IconURL  string          `json:"icon_url"`
+	Props    StringInterface `json:"props"`
+	Type     string          `json:"type"`
+}
+
 func (o *OutgoingWebhookPayload) ToJSON() string {
 	b, err := json.Marshal(o)
 	if err != nil {
@@ -112,6 +120,26 @@ func OutgoingWebhookListFromJson(data io.Reader) []*OutgoingWebhook {
 	}
 }
 
+func (o *OutgoingWebhookResponse) ToJson() string {
+	b, err := json.Marshal(o)
+	if err != nil {
+		return ""
+	} else {
+		return string(b)
+	}
+}
+
+func OutgoingWebhookResponseFromJson(data io.Reader) *OutgoingWebhookResponse {
+	decoder := json.NewDecoder(data)
+	var o OutgoingWebhookResponse
+	err := decoder.Decode(&o)
+	if err == nil {
+		return &o
+	} else {
+		return nil
+	}
+}
+
 func (o *OutgoingWebhook) IsValid() *AppError {
 
 	if len(o.Id) != 26 {

model/outgoing_webhook_test.go

@@ -176,3 +176,16 @@ func TestOutgoingWebhookTriggerWordStartsWith(t *testing.T) {
 		t.Fatal("Should return false")
 	}
 }
+
+func TestOutgoingWebhookResponseJson(t *testing.T) {
+	o := OutgoingWebhookResponse{}
+	o.Text = new(string)
+	*o.Text = "some text"
+
+	json := o.ToJson()
+	ro := OutgoingWebhookResponseFromJson(strings.NewReader(json))
+
+	if *o.Text != *ro.Text {
+		t.Fatal("Text does not match")
+	}
+}