tsk-8: Schedule message (#15)

Closes #8

Reviewed-on: #15
Co-authored-by: phoenix <kundeng00@pm.me>
Co-committed-by: phoenix <kundeng00@pm.me>

internal/service/message.go

@@ -0,0 +1,58 @@
+package service
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"net/url"
+
+	"git.kundeng.us/phoenix/textsender-models/tx0/message"
+	"git.kundeng.us/phoenix/textsender-models/tx0/token"
+	"github.com/google/uuid"
+
+	"git.kundeng.us/phoenix/catapult/internal/app"
+)
+
+type Message struct {
+	Application *app.App
+	Token       *token.Login
+}
+
+type getMessageResponse struct {
+	Message string `json:"message"`
+	Data []*message.Message `json:"data"`
+}
+
+func (m *Message) GetMessage(id uuid.UUID) (*message.Message, error) {
+	params := url.Values{}
+	params.Add("id", id.String())
+	pm := params.Encode()
+	fullUrl := fmt.Sprintf("%s/api/v1/message?%s", m.Application.ApiUrl, pm) 
+	fmt.Println("Url:", fullUrl)
+	req, err := http.NewRequest("GET", fullUrl, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	token := m.Token.AccessToken
+	req.Header.Set("Authorization", "Bearer "+token)
+
+	client := &http.Client{}
+	resp, err := client.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	var r getMessageResponse
+	err = json.NewDecoder(resp.Body).Decode(&r)
+	if err != nil {
+		return nil, err
+	} else {
+		if len(r.Data) == 0 {
+			return nil, nil
+		} else {
+			return r.Data[0], nil
+		}
+	}
+}