add page for item and route for deleting items

main.go

@@ -8,6 +8,7 @@ import (
 	"log"
 	"net/http"
 	"os"
+	"strconv"
 	"time"
 
 	"github.com/PuerkitoBio/goquery"
@@ -20,7 +21,7 @@ type Item struct {
 	URL         string    `json:"url" db:"url"`
 	Title       string    `json:"title" db:"title"`
 	Description string    `json:"description" db:"description"`
-	ImageURL    string    `json:"imageUrl" db:"image_url"`
+	Image       *string   `json:"image" db:"image"`
 	CreatedAt   time.Time `json:"createdAt" db:"created_at"`
 	UpdatedAt   time.Time `json:"updatedAt" db:"updated_at"`
 }
@@ -28,7 +29,7 @@ type Item struct {
 type ArticleMetadata struct {
 	Title       string
 	Description string
-	ImageURL    string
+	Image       *string
 }
 
 func getArticleMetadata(url string) (*ArticleMetadata, error) {
@@ -38,6 +39,12 @@ func getArticleMetadata(url string) (*ArticleMetadata, error) {
 	}
 	defer resp.Body.Close()
 
+	if resp.StatusCode < 200 || resp.StatusCode >= 400 {
+		return &ArticleMetadata{
+			Title: url,
+		}, nil
+	}
+
 	doc, err := goquery.NewDocumentFromReader(resp.Body)
 	if err != nil {
 		return nil, fmt.Errorf("failed to parse page html: %v", err)
@@ -50,12 +57,12 @@ func getArticleMetadata(url string) (*ArticleMetadata, error) {
 
 	description := doc.Find(`head>meta[name="og:description"]`).AttrOr("content", "")
 
-	imageUrl := doc.Find(`head>meta[name="og:image"]`).AttrOr("content", "")
-	if imageUrl == "" {
+	image := doc.Find(`head>meta[name="og:image"]`).AttrOr("content", "")
+	if image == "" {
 		doc.Find("img").Each(func(i int, s *goquery.Selection) {
 			src := s.AttrOr("src", "")
 			if src != "" {
-				imageUrl = src
+				image = src
 				return
 			}
 		})
@@ -64,7 +71,7 @@ func getArticleMetadata(url string) (*ArticleMetadata, error) {
 	return &ArticleMetadata{
 		Title:       title,
 		Description: description,
-		ImageURL:    imageUrl,
+		Image:       &image,
 	}, nil
 }
 
@@ -91,7 +98,7 @@ CREATE TABLE IF NOT EXISTS items (
 	url varchar not null unique,
 	title varchar not null,
 	description varchar,
-	image_url varchar not null,
+	image varchar default null,
 	created_at datetime default current_timestamp,
 	updated_at datetime default current_timestamp
 );
@@ -127,11 +134,11 @@ END;
 			return
 		}
 
-		if _, err := db.NamedExec("INSERT INTO items (url, title, description, image_url) VALUES (:url, :title, :description, :image_url)", map[string]any{
+		if _, err := db.NamedExec("INSERT INTO items (url, title, description, image) VALUES (:url, :title, :description, :image)", map[string]any{
 			"url":         pageUrl,
 			"title":       meta.Title,
 			"description": meta.Description,
-			"image_url":   meta.ImageURL,
+			"image":       meta.Image,
 		}); err != nil {
 			http.Error(w, fmt.Sprintf("failed to add item to db: %v", err), 500)
 			return
@@ -162,6 +169,47 @@ END;
 		}
 	})
 
+	mux.HandleFunc("GET /items/{id}", func(w http.ResponseWriter, r *http.Request) {
+		id, err := strconv.Atoi(r.PathValue("id"))
+		if err != nil {
+			http.Error(w, err.Error(), 500)
+			return
+		}
+
+		row := db.QueryRowx("SELECT * FROM items WHERE id = ?", id)
+		if row.Err() != nil {
+			http.Error(w, fmt.Sprintf("item not found: %v", row.Err()), 404)
+			return
+		}
+
+		item := &Item{}
+		if err := row.StructScan(item); err != nil {
+			http.Error(w, fmt.Sprintf("failed to scan item to struct: %v", err), 500)
+			return
+		}
+
+		tmpl.ExecuteTemplate(w, "item.html", struct {
+			Item *Item
+		}{
+			Item: item,
+		})
+	})
+
+	mux.HandleFunc("POST /items/{id}/delete", func(w http.ResponseWriter, r *http.Request) {
+		id, err := strconv.Atoi(r.PathValue("id"))
+		if err != nil {
+			http.Error(w, err.Error(), 500)
+			return
+		}
+
+		if _, err := db.Exec("DELETE FROM items WHERE id = ?", id); err != nil {
+			http.Error(w, fmt.Sprintf("failed to delete item: %v", err), 500)
+			return
+		}
+
+		http.Redirect(w, r, "/", http.StatusFound)
+	})
+
 	log.Println("starting http server")
 	if err := http.ListenAndServe(":5000", mux); err != nil {
 		log.Fatalf("failed to start http server: %v\n", err)

views/item.html

@@ -0,0 +1,25 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>{{.Item.Title}}</title>
+
+    <style>
+      .container {
+        max-width: 1200px;
+        width: 100%;
+        margin: 0 auto;
+      }
+    </style>
+  </head>
+  <body>
+    <div class="container">
+      <img src="{{.Item.Image}}" alt="" width="auto" height="100px" />
+      <h2>{{.Item.Title}}</h2>
+      <form method="POST" action="/items/{{.Item.ID}}/delete">
+        <button type="submit">Delete item</button>
+      </form>
+    </div>
+  </body>
+</html>