tsk-20: Add event to scheduled message (#23)

Closes #20

Reviewed-on: phoenix/textsender-api#23
Co-authored-by: phoenix <kundeng00@pm.me>
Co-committed-by: phoenix <kundeng00@pm.me>

internal/handler/scheduled_message_event.go

@@ -0,0 +1,81 @@
+package handler
+
+import (
+	"net/http"
+
+	"github.com/google/uuid"
+
+	"git.kundeng.us/phoenix/textsender-api/internal/store"
+	"git.kundeng.us/phoenix/textsender-models/pkg/message/scheduling"
+)
+
+type RequestAddScheduledMessageEvent struct {
+	RecipientId        uuid.UUID `json:"recipient_id"`
+	MessageId          uuid.UUID `json:"message_id"`
+	ScheduledMessageId uuid.UUID `json:"scheduled_message_id"`
+}
+
+type AddScheduledMessageEventResponse struct {
+	Message string                             `json:"message"`
+	Data    []scheduling.ScheduledMessageEvent `json:"data"`
+}
+
+type ScheduledMessageEventHandler struct {
+	ScheduledMessageEventStore store.ScheduledMessageEventStore
+}
+
+func NewScheduledMessageEventHandler(str store.ScheduledMessageEventStore) *ScheduledMessageEventHandler {
+	return &ScheduledMessageEventHandler{ScheduledMessageEventStore: str}
+}
+
+func (s *ScheduledMessageEventHandler) AddScheduledMessageEvent(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodPost {
+		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
+		return
+	}
+
+	var req RequestAddScheduledMessageEvent
+	if err := ExtractFromRequest(r, &req); err != nil {
+		http.Error(w, "Invalid JSON: "+err.Error(), http.StatusBadRequest)
+	}
+	defer r.Body.Close()
+
+	event := scheduling.ScheduledMessageEvent{RecipientId: req.RecipientId, MessageId: req.MessageId, ScheduledMessageId: req.ScheduledMessageId}
+
+	var statusCode int
+	var resp AddScheduledMessageEventResponse
+
+	if event.RecipientId == uuid.Nil {
+		statusCode = http.StatusBadRequest
+		resp.Message = "Recipient Id is nil"
+	} else if event.MessageId == uuid.Nil {
+		statusCode = http.StatusBadRequest
+		resp.Message = "Message Id is nil"
+	} else if event.ScheduledMessageId == uuid.Nil {
+		statusCode = http.StatusBadRequest
+		resp.Message = "Scheduled Message Id is nil"
+	} else {
+		ctx := r.Context()
+
+		if exists, err := s.ScheduledMessageEventStore.Exists(ctx, &event); err == nil {
+			if exists {
+				statusCode = http.StatusBadRequest
+				resp.Message = "Event already present"
+			} else {
+				if err = s.ScheduledMessageEventStore.CreateScheduledMessageEvent(ctx, &event); err == nil {
+					statusCode = http.StatusCreated
+					resp.Message = "Successful"
+					resp.Data = append(resp.Data, event)
+				} else {
+					statusCode = http.StatusInternalServerError
+					resp.Message = err.Error()
+				}
+			}
+		} else {
+			statusCode = http.StatusInternalServerError
+			resp.Message = err.Error()
+		}
+	}
+
+	RespondWithJSON(w, statusCode, &resp)
+}