From 490f32d46b4682e3552481456c2e8583e76dc7b4 Mon Sep 17 00:00:00 2001
From: kolaente <konrad@kola-entertainments.de>
Date: Sat, 7 Jul 2018 14:19:34 +0200
Subject: [PATCH] Added CRUD helper method

---
 models/helper.go             | 13 ++++++++
 models/lists.go              | 19 +++++++-----
 routes/api/v1/CRUD_helper.go | 57 ++++++++++++++++++++++++++++++++++++
 routes/routes.go             |  8 ++++-
 4 files changed, 88 insertions(+), 9 deletions(-)
 create mode 100644 routes/api/v1/CRUD_helper.go

diff --git a/models/helper.go b/models/helper.go
index 368168fc..fad4813d 100644
--- a/models/helper.go
+++ b/models/helper.go
@@ -14,3 +14,16 @@ func GetIntURLParam(param string, c echo.Context) (intParam int64, err error) {
 
 	return intParam, err
 }
+
+func GetByID(id int64, result interface{}) (err error) {
+	exists, err := x.ID(id).Get(result)
+	if err != nil {
+		return err
+	}
+
+	if !exists {
+		return ErrListDoesNotExist{}
+	}
+
+	return
+}
\ No newline at end of file
diff --git a/models/lists.go b/models/lists.go
index b4bbdc79..686eb22e 100644
--- a/models/lists.go
+++ b/models/lists.go
@@ -15,6 +15,15 @@ type List struct {
 	Updated int64 `xorm:"updated" json:"updated"`
 }
 
+func (l *List) AfterLoad() {
+
+	// Get the owner
+	l.Owner, _, _ = GetUserByID(l.OwnerID)
+
+	// Get the list items
+	l.Items, _ = GetItemsByListID(l.ID)
+}
+
 // GetListByID returns a list by its ID
 func GetListByID(id int64) (list List, err error) {
 	exists, err := x.ID(id).Get(&list) // tName ist hässlich, geht das nicht auch anders?
@@ -26,17 +35,11 @@ func GetListByID(id int64) (list List, err error) {
 		return list, ErrListDoesNotExist{ID: id}
 	}
 
-	// Get the list owner
-	list.Owner, _, err = GetUserByID(list.OwnerID)
-	if err != nil {
-		return List{}, err
-	}
-
-	items, err := GetItemsByListID(list.ID)
+	/*items, err := GetItemsByListID(list.ID)
 	if err != nil {
 		return
 	}
-	list.Items = items
+	list.Items = items*/
 
 	return list, nil
 }
diff --git a/routes/api/v1/CRUD_helper.go b/routes/api/v1/CRUD_helper.go
new file mode 100644
index 00000000..37c9b607
--- /dev/null
+++ b/routes/api/v1/CRUD_helper.go
@@ -0,0 +1,57 @@
+package v1
+
+import (
+	"git.kolaente.de/konrad/list/models"
+	"github.com/labstack/echo"
+	"net/http"
+	"strconv"
+)
+
+// Basic Method definitions
+type CRUD interface {
+	Create()
+	Read(int64) (error)
+	Update()
+	Delete()
+}
+
+// We use this to acces the default methods
+type DefaultCRUD struct {
+	CRUD
+	Target interface{}
+}
+
+// This method gets our data, which will be called by ReadWeb()
+func (d *DefaultCRUD) Read(id int64) (err error) {
+	return models.GetByID(id, d.Target)
+}
+
+// This does web stuff, aka returns json etc. Uses DefaultCRUD Methods to get the data
+type CRUDWebHandler struct {
+	CObject CRUD
+}
+
+// This does json, handles the request
+func (c *CRUDWebHandler) ReadOneWeb(ctx echo.Context) error {
+
+	// Get the ID
+	id, err := strconv.ParseInt(ctx.Param("id"), 10, 64)
+	if err != nil {
+		return ctx.JSON(http.StatusBadRequest, models.Message{"Invalid ID."})
+	}
+
+	// TODO check rights
+
+	// Get our object
+	err = c.CObject.Read(id)
+	if err != nil {
+		if models.IsErrListDoesNotExist(err) {
+			return ctx.JSON(http.StatusNotFound, models.Message{"Not found."})
+		}
+
+		return ctx.JSON(http.StatusInternalServerError, models.Message{"An error occured."})
+	}
+
+	// TODO how can we return c.CObject.Targetdirectly?
+	return ctx.JSON(http.StatusOK, c.CObject)
+}
diff --git a/routes/routes.go b/routes/routes.go
index a61f7441..8e9a2f9a 100644
--- a/routes/routes.go
+++ b/routes/routes.go
@@ -84,7 +84,13 @@ func RegisterRoutes(e *echo.Echo) {
 	a.POST("/tokenTest", apiv1.CheckToken)
 
 	a.GET("/lists", apiv1.GetListsByUser)
-	a.GET("/lists/:id", apiv1.GetListByID)
+	//a.GET("/lists/:id", apiv1.GetListByID)
+	listHandler := &apiv1.CRUDWebHandler{
+		CObject: &apiv1.DefaultCRUD{
+			Target: &models.List{},
+		},
+	}
+	a.GET("/lists/:id", listHandler.ReadOneWeb)
 	a.POST("/lists/:id", apiv1.UpdateList)
 	a.PUT("/lists/:id", apiv1.AddListItem)
 	a.DELETE("/lists/:id", apiv1.DeleteListByID)