feat: add context to message entries

webhook/testdata/button_reply.json

@@ -0,0 +1,47 @@
+{
+  "object": "whatsapp_business_account",
+  "entry": [
+    {
+      "id": "102290129340398",
+      "changes": [
+        {
+          "value": {
+            "messaging_product": "whatsapp",
+            "metadata": {
+              "display_phone_number": "15550783881",
+              "phone_number_id": "106540352242922"
+            },
+            "contacts": [
+              {
+                "profile": {
+                  "name": "Sheena Nelson"
+                },
+                "wa_id": "16505551234"
+              }
+            ],
+            "messages": [
+              {
+                "context": {
+                  "from": "15550783881",
+                  "id": "wamid.HBgLMTQxMjU1NTA4MjkVAgASGBQzQUNCNjk5RDUwNUZGMUZEM0VBRAA="
+                },
+                "from": "16505551234",
+                "id": "wamid.HBgLMTY1MDM4Nzk0MzkVAgASGBQzQUFERjg0NDEzNDdFODU3MUMxMAA=",
+                "timestamp": "1749854575",
+                "type": "interactive",
+                "interactive": {
+                  "type": "button_reply",
+                  "button_reply": {
+                    "id": "bug",
+                    "title": "bug in code"
+                  }
+                }
+              }
+            ]
+          },
+          "field": "messages"
+        }
+      ]
+    }
+  ]
+}

webhook/webhook.go

@@ -41,6 +41,7 @@ type Message struct {
 	ID          string      `json:"id"`
 	Timestamp   string      `json:"timestamp"`
 	Type        string      `json:"type"`
+	Context     *Context    `json:"context"`
 	Text        Text        `json:"text"`
 	Interactive Interactive `json:"interactive"`
 }
@@ -50,11 +51,22 @@ type Text struct {
 }
 
 type Interactive struct {
-	Type     string   `json:"type"`
-	NfmReply NfmReply `json:"nfm_reply"`
+	Type        string       `json:"type"`
+	NfmReply    *NfmReply    `json:"nfm_reply,omitempty"`
+	ButtonReply *ButtonReply `json:"button_reply,omitempty"`
 }
 
 type NfmReply struct {
 	Name         string `json:"name"`
 	ResponseJson string `json:"response_json"`
 }
+
+type ButtonReply struct {
+	ID    string `json:"id"`
+	Title string `json:"title"`
+}
+
+type Context struct {
+	From string `json:"from"`
+	ID   string `json:"id"`
+}

webhook/webhook_test.go

@@ -0,0 +1,61 @@
+package webhook
+
+import (
+	_ "embed"
+	"encoding/json"
+	"testing"
+)
+
+//go:embed testdata/button_reply.json
+var buttonReply []byte
+
+func TestParseButtonReply(t *testing.T) {
+	var notification Notification
+	err := json.Unmarshal(buttonReply, &notification)
+	if err != nil {
+		t.Fatalf("unable to unmarshall notification: %v", err)
+	}
+
+	message := notification.Entry[0].Changes[0].Value.Messages[0]
+	if message.Type != "interactive" {
+		t.Errorf("message type - want %s, got %s", "interactive", message.Type)
+	}
+
+	if message.Interactive.ButtonReply == nil {
+		t.Fatalf("expected ButtonReply to be non nil")
+	}
+	buttonReply := message.Interactive.ButtonReply
+
+	expectedID := "bug"
+	expectedTitle := "bug in code"
+	if buttonReply.ID != expectedID {
+		t.Errorf("button id - got: %s, want: %s", buttonReply.ID, expectedID)
+	}
+
+	if buttonReply.Title != expectedTitle {
+		t.Errorf("button title-  got: %s, want: %s", buttonReply.Title, expectedTitle)
+	}
+}
+
+func TestParseContext(t *testing.T) {
+	var notification Notification
+	err := json.Unmarshal(buttonReply, &notification)
+	if err != nil {
+		t.Fatalf("unable to unmarshall notification: %v", err)
+	}
+
+	message := notification.Entry[0].Changes[0].Value.Messages[0]
+	if message.Context == nil {
+		t.Fatalf("expected message context to be non nil")
+	}
+
+	wantFrom := "15550783881"
+	if message.Context.From != wantFrom {
+		t.Errorf("context.From - got: %s, want: %s", message.Context.From, wantFrom)
+	}
+
+	wantId := "wamid.HBgLMTQxMjU1NTA4MjkVAgASGBQzQUNCNjk5RDUwNUZGMUZEM0VBRAA="
+	if message.Context.ID != wantId {
+		t.Errorf("context.ID - got: %s, want: %s", message.Context.ID, wantId)
+	}
+}