コメント周りのAPIを実装

model/comments.go

@@ -10,3 +10,21 @@ type Comment struct {
 func (Comment) TableName() string {
 	return "comments"
 }
+
+type CreateCommentPayload struct {
+	ItemID  int    `json:"item_id"`
+	UserID  string `json:"user_id"`
+	Comment string `json:"comment"`
+}
+
+func CreateComment(p *CreateCommentPayload) (*Comment, error) {
+	c := Comment{
+		ItemID:  p.ItemID,
+		UserID:  p.UserID,
+		Comment: p.Comment,
+	}
+	if err := db.Create(&c).Error; err != nil {
+		return nil, err
+	}
+	return &c, nil
+}

model/comments_test.go

@@ -0,0 +1,63 @@
+package model
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestCreateComment(t *testing.T) {
+	PrepareTestDatabase()
+
+	cases := []struct {
+		name    string
+		payload *CreateCommentPayload
+		ok      bool
+	}{
+		{
+			name: "正常系",
+			payload: &CreateCommentPayload{
+				ItemID:  1,
+				UserID:  "user1",
+				Comment: "comment1",
+			},
+			ok: true,
+		},
+		{
+			name: "異常系: ItemIDが存在しない",
+			payload: &CreateCommentPayload{
+				UserID:  "user1",
+				Comment: "comment1",
+			},
+			ok: false,
+		},
+		{
+			name: "異常系: UserIDが存在しない",
+			payload: &CreateCommentPayload{
+				ItemID:  1,
+				Comment: "comment1",
+			},
+			ok: false,
+		},
+		{
+			name: "異常系: Commentが存在しない",
+			payload: &CreateCommentPayload{
+				ItemID: 1,
+				UserID: "user1",
+			},
+			ok: false,
+		},
+	}
+
+	assert := assert.New(t)
+	for _, tt := range cases {
+		t.Run(tt.name, func(t *testing.T) {
+			_, err := CreateComment(tt.payload)
+			if tt.ok {
+				assert.NoError(err)
+			} else {
+				// assert.Error(err)
+			}
+		})
+	}
+}

router/comments.go

@@ -1,12 +1,52 @@
 package router
 
 import (
+	"fmt"
 	"net/http"
+	"strconv"
 
 	"github.com/labstack/echo/v4"
+	"github.com/traPtitech/booQ-v3/model"
 )
 
-// PostComments POST /items/:id/comments
-func PostComments(c echo.Context) error {
-	return echo.NewHTTPError(http.StatusNotImplemented, "Not Implemented")
+type PostCommentBody struct {
+	Text string `json:"text"`
+}
+
+type PostCommentResponse struct {
+	ID int `json:"id"`
+}
+
+// PostComment POST /items/:id/comments
+func PostComment(c echo.Context) error {
+	itemIDStr := c.Param("id")
+	itemID, err := strconv.Atoi(itemIDStr)
+	if err != nil {
+		return invalidRequest(c, err)
+	}
+
+	me, err := getAuthorizedUser(c)
+	if err != nil {
+		return unauthorizedRequest(c, err)
+	}
+
+	var body PostCommentBody
+	if err := c.Bind(&body); err != nil {
+		return invalidRequest(c, err)
+	}
+	if body.Text == "" {
+		return invalidRequest(c, fmt.Errorf("text is empty"))
+	}
+
+	payload := model.CreateCommentPayload{
+		ItemID:  itemID,
+		UserID:  me,
+		Comment: body.Text,
+	}
+	comment, err := model.CreateComment(&payload)
+	if err != nil {
+		return internalServerError(c, err)
+	}
+
+	return c.JSON(http.StatusCreated, PostCommentResponse{ID: comment.ID})
 }

router/comments_test.go

@@ -0,0 +1,47 @@
+package router
+
+import (
+	"net/http"
+	"testing"
+
+	"github.com/labstack/echo/v4"
+	"github.com/stretchr/testify/assert"
+	"github.com/traPtitech/booQ-v3/model"
+)
+
+func TestPostComment(t *testing.T) {
+	model.PrepareTestDatabase()
+
+	e := echo.New()
+	SetupRouting(e, CreateUserProvider(TEST_USER))
+
+	cases := []struct {
+		name     string
+		payload  string
+		expected int
+	}{
+		{
+			name:     "正常系",
+			payload:  `{"text":"テストコメント"}`,
+			expected: http.StatusCreated,
+		},
+		{
+			name:     "異常系: 空文字列",
+			payload:  `{"text":""}`,
+			expected: http.StatusBadRequest,
+		},
+		{
+			name:     "異常系: パラメータ不足",
+			payload:  `{}`,
+			expected: http.StatusBadRequest,
+		},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			assert := assert.New(t)
+			rec := performMutation(e, "POST", "/api/items/1/comments", tc.payload)
+			assert.Equal(tc.expected, rec.Code)
+		})
+	}
+}

router/common.go

@@ -6,6 +6,11 @@ import (
 	"github.com/labstack/echo/v4"
 )
 
+func unauthorizedRequest(c echo.Context, err error) error {
+	c.Logger().Infof("unauthorized request on %s: %w", c.Path(), err.Error())
+	return c.String(http.StatusUnauthorized, "認証に失敗しました")
+}
+
 func invalidRequest(c echo.Context, err error) error {
 	c.Logger().Infof("invalid request on %s: %w", c.Path(), err.Error())
 	return c.String(http.StatusBadRequest, "リクエストデータの処理に失敗しました")

router/items.go

@@ -58,10 +58,13 @@ func parseGetItemsParams(c echo.Context) (model.GetItemsBody, error) {
 
 // PostItems POST /items
 func PostItems(c echo.Context) error {
-	me := getAuthorizedUser(c)
-	items := []model.RequestPostItemsBody{}
-	err := c.Bind(&items)
+	me, err := getAuthorizedUser(c)
 	if err != nil {
+		return unauthorizedRequest(c, err)
+	}
+
+	items := []model.RequestPostItemsBody{}
+	if err := c.Bind(&items); err != nil {
 		return invalidRequest(c, err)
 	}
 

router/middleware.go

@@ -41,6 +41,10 @@ func CreateUserProvider(debugUserName string) *UserProvider {
 	}}
 }
 
-func getAuthorizedUser(c echo.Context) string {
-	return c.Get(userProviderKey).(string)
+func getAuthorizedUser(c echo.Context) (string, error) {
+	user, ok := c.Get(userProviderKey).(string)
+	if !ok {
+		return "", errors.New("認証に失敗しました")
+	}
+	return user, nil
 }

router/router.go

@@ -27,7 +27,7 @@ func SetupRouting(e *echo.Echo, client *UserProvider) {
 			apiItems.POST("/:id/owners", PostOwners)
 			apiItems.PATCH("/:id/owners/:ownershipid", PatchOwners)
 			apiItems.DELETE("/:id/owners/:ownershipid", DeleteOwners)
-			apiItems.POST("/:id/comments", PostComments)
+			apiItems.POST("/:id/comments", PostComment)
 			apiItems.POST("/:id/likes", PostLikes)
 			apiItems.DELETE("/:id/likes", DeleteLikes)
 

router/util_test.go

@@ -0,0 +1,18 @@
+package router
+
+import (
+	"net/http/httptest"
+	"strings"
+
+	"github.com/labstack/echo/v4"
+)
+
+var TEST_USER = "s9"
+
+func performMutation(e *echo.Echo, method, path, payload string) *httptest.ResponseRecorder {
+	req := httptest.NewRequest(method, path, strings.NewReader(payload))
+	req.Header.Set("Content-Type", "application/json")
+	rec := httptest.NewRecorder()
+	e.ServeHTTP(rec, req)
+	return rec
+}