First checkpoint

server/categories/create.go

@@ -0,0 +1,38 @@
+package categories
+
+import (
+	"gis/app"
+	"gis/server/httputil"
+	"net/http"
+)
+
+type CreateCategoryRequest struct {
+	Name        string `json:"name" validate:"required,max=255"`
+	Description string `json:"description" validate:"required"`
+}
+
+func createCategoryRoute(application *app.App) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		req, err := httputil.DecodeJSON[CreateCategoryRequest](w, r)
+		if err != nil {
+			http.Error(w, "Invalid request", http.StatusBadRequest)
+			return
+		}
+
+		if err := application.Validator.Struct(req); err != nil {
+			httputil.WriteValidationErrors(w, err)
+			return
+		}
+
+		_, err = application.Db.Exec(application.Ctx,
+			"INSERT INTO categories (name, description) VALUES ($1, $2)",
+			req.Name, req.Description,
+		)
+		if err != nil {
+			w.WriteHeader(http.StatusInternalServerError)
+			return
+		}
+
+		w.WriteHeader(http.StatusCreated)
+	}
+}

server/categories/delete.go

@@ -0,0 +1,27 @@
+package categories
+
+import (
+	"gis/app"
+	"net/http"
+)
+
+func deleteCategoryRoute(application *app.App) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		id := r.PathValue("id")
+
+		tag, err := application.Db.Exec(application.Ctx,
+			"DELETE FROM categories WHERE id=$1",
+			id,
+		)
+		if err != nil {
+			w.WriteHeader(http.StatusInternalServerError)
+			return
+		}
+		if tag.RowsAffected() == 0 {
+			w.WriteHeader(http.StatusNotFound)
+			return
+		}
+
+		w.WriteHeader(http.StatusNoContent)
+	}
+}

server/categories/index.go

@@ -0,0 +1,39 @@
+package categories
+
+import (
+	"encoding/json"
+	"gis/app"
+	"net/http"
+)
+
+func listCategoriesRoute(application *app.App) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+
+		rows, err := application.Db.Query(application.Ctx, "SELECT id, name FROM categories")
+		if err != nil {
+			w.WriteHeader(http.StatusInternalServerError)
+			return
+		}
+		defer rows.Close()
+
+		cats := make([]Category, 0)
+		for rows.Next() {
+			var c Category
+			if err := rows.Scan(&c.ID, &c.Name); err != nil {
+				w.WriteHeader(http.StatusInternalServerError)
+				return
+			}
+			cats = append(cats, c)
+		}
+		if err := rows.Err(); err != nil {
+			w.WriteHeader(http.StatusInternalServerError)
+			return
+		}
+
+		if err := json.NewEncoder(w).Encode(map[string][]Category{"data": cats}); err != nil {
+			w.WriteHeader(http.StatusInternalServerError)
+			return
+		}
+	}
+}

server/categories/routes.go

@@ -0,0 +1,13 @@
+package categories
+
+import (
+	"gis/app"
+	"net/http"
+)
+
+func AddCategoriesRoutes(application *app.App, mux *http.ServeMux) {
+	mux.HandleFunc("GET /categories", listCategoriesRoute(application))
+	mux.HandleFunc("POST /categories", createCategoryRoute(application))
+	mux.HandleFunc("PUT /categories/{id}", updateCategoryRoute(application))
+	mux.HandleFunc("DELETE /categories/{id}", deleteCategoryRoute(application))
+}

server/categories/types.go

@@ -0,0 +1,6 @@
+package categories
+
+type Category struct {
+	ID   string `json:"id"`
+	Name string `json:"name"`
+}

server/categories/update.go

@@ -0,0 +1,44 @@
+package categories
+
+import (
+	"gis/app"
+	"gis/server/httputil"
+	"net/http"
+)
+
+type UpdateCategoryRequest struct {
+	Name        string `json:"name" validate:"required,max=255"`
+	Description string `json:"description" validate:"required"`
+}
+
+func updateCategoryRoute(application *app.App) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		id := r.PathValue("id")
+
+		req, err := httputil.DecodeJSON[UpdateCategoryRequest](w, r)
+		if err != nil {
+			http.Error(w, "Invalid request", http.StatusBadRequest)
+			return
+		}
+
+		if err := application.Validator.Struct(req); err != nil {
+			httputil.WriteValidationErrors(w, err)
+			return
+		}
+
+		tag, err := application.Db.Exec(application.Ctx,
+			"UPDATE categories SET name=$1, description=$2, updated_at=now() WHERE id=$3",
+			req.Name, req.Description, id,
+		)
+		if err != nil {
+			w.WriteHeader(http.StatusInternalServerError)
+			return
+		}
+		if tag.RowsAffected() == 0 {
+			w.WriteHeader(http.StatusNotFound)
+			return
+		}
+
+		w.WriteHeader(http.StatusNoContent)
+	}
+}