Enhance Pokémon data retrieval by optimizing SQL query, adding caching for images, and improving error handling in the frontend

v2/get-pokemon.php

@@ -10,13 +10,26 @@ if ($conn->connect_error) {
     die("Connection failed: " . $conn->connect_error);
 }
 
+header("Cache-Control: max-age=3600"); // Cache for 1 hour
+
 if (isset($_GET['id'])) {
     $id = intval($_GET['id']);
-    $sql = "SELECT * FROM pokemon WHERE id = $id";
+    $sql = "SELECT p.*, s.flavor_text, GROUP_CONCAT(t.name) AS types, GROUP_CONCAT(a.name) AS abilities, st.hp, st.attack, st.defense, st.sp_attack, st.sp_defense, st.speed
+            FROM pokemon p
+            LEFT JOIN species s ON p.id = s.pokemon_id
+            LEFT JOIN pokemon_types pt ON p.id = pt.pokemon_id
+            LEFT JOIN types t ON pt.type_id = t.id
+            LEFT JOIN pokemon_abilities pa ON p.id = pa.pokemon_id
+            LEFT JOIN abilities a ON pa.ability_id = a.id
+            LEFT JOIN stats st ON p.id = st.pokemon_id
+            WHERE p.id = $id
+            GROUP BY p.id";
     $result = $conn->query($sql);
 
     if ($result->num_rows > 0) {
         $pokemon = $result->fetch_assoc();
+        $pokemon['types'] = explode(',', $pokemon['types']);
+        $pokemon['abilities'] = explode(',', $pokemon['abilities']);
         echo json_encode($pokemon);
     } else {
         echo json_encode(["error" => "No Pokémon found"]);

v2/pokemon-detail.js

@@ -56,7 +56,7 @@ async function loadPokemon(id) {
     return true;
   } catch (error) {
     console.error("An error occurred while fetching Pokémon data:", error);
-    return false;
+    return (window.location.href = "./index.html");
   }
 }
 
@@ -101,7 +101,7 @@ function rgbaFromHex(hexColor) {
 }
 
 function setTypeBackgroundColor(pokemon) {
-  const mainType = pokemon.types[0].type.name;
+  const mainType = pokemon.types[0];
   const color = typeColors[mainType];
 
   if (!color) {
@@ -158,7 +158,7 @@ function createAndAppendElement(parent, tag, options = {}) {
 }
 
 function displayPokemonDetails(pokemon) {
-  const { name, id, types, weight, height, abilities, stats } = pokemon;
+  const { name, id, types, weight, height, abilities, hp, attack, defense, sp_attack, sp_defense, speed } = pokemon;
   const capitalizePokemonName = capitalizeFirstLetter(name);
 
   document.querySelector("title").textContent = capitalizePokemonName;
@@ -174,15 +174,15 @@ function displayPokemonDetails(pokemon) {
   ).textContent = `#${String(id).padStart(3, "0")}`;
 
   const imageElement = document.querySelector(".detail-img-wrapper img");
-  imageElement.src = `https://raw.githubusercontent.com/PokeAPI/sprites/master/sprites/pokemon/other/dream-world/${id}.svg`;
+  imageElement.src = pokemon.image_url;
   imageElement.alt = name;
 
   const typeWrapper = document.querySelector(".power-wrapper");
   typeWrapper.innerHTML = "";
-  types.forEach(({ type }) => {
+  types.forEach((type) => {
     createAndAppendElement(typeWrapper, "p", {
-      className: `body3-fonts type ${type.name}`,
-      textContent: type.name,
+      className: `body3-fonts type ${type}`,
+      textContent: type,
     });
   });
 
@@ -196,10 +196,10 @@ function displayPokemonDetails(pokemon) {
   const abilitiesWrapper = document.querySelector(
     ".pokemon-detail-wrap .pokemon-detail.move"
   );
-  abilities.forEach(({ ability }) => {
+  abilities.forEach((ability) => {
     createAndAppendElement(abilitiesWrapper, "p", {
       className: "body3-fonts",
-      textContent: ability.name,
+      textContent: ability,
     });
   });
 
@@ -210,29 +210,31 @@ function displayPokemonDetails(pokemon) {
     hp: "HP",
     attack: "ATK",
     defense: "DEF",
-    "special-attack": "SATK",
-    "special-defense": "SDEF",
+    sp_attack: "SATK",
+    sp_defense: "SDEF",
     speed: "SPD",
   };
 
-  stats.forEach(({ stat, base_stat }) => {
+  const stats = { hp, attack, defense, sp_attack, sp_defense, speed };
+
+  Object.keys(stats).forEach((stat) => {
     const statDiv = document.createElement("div");
     statDiv.className = "stats-wrap";
     statsWrapper.appendChild(statDiv);
 
     createAndAppendElement(statDiv, "p", {
       className: "body3-fonts stats",
-      textContent: statNameMapping[stat.name],
+      textContent: statNameMapping[stat],
     });
 
     createAndAppendElement(statDiv, "p", {
       className: "body3-fonts",
-      textContent: String(base_stat).padStart(3, "0"),
+      textContent: String(stats[stat]).padStart(3, "0"),
     });
 
     createAndAppendElement(statDiv, "progress", {
       className: "progress-bar",
-      value: base_stat,
+      value: stats[stat],
       max: 100,
     });
   });

v2/pokemon.js

@@ -12,6 +12,7 @@ fetch(`./get-pokemon.php`)
   .then((data) => {
     if (Array.isArray(data)) {
       allPokemons = data;
+      cacheImages(allPokemons);
       displayPokemons(allPokemons);
     } else {
       console.error("Unexpected response format:", data);
@@ -30,14 +31,32 @@ async function fetchPokemonDataBeforeRedirect(id) {
 
     return true;
   } catch (error) {
-    console.error("Failed to fetch Pokémon data before redirect");
+    console.error("Failed to fetch Pokémon data before redirect:", error);
+    return false;
   }
 }
 
+function cacheImages(pokemons) {
+  pokemons.forEach((pokemon) => {
+    const img = new Image();
+    img.src = pokemon.image_url;
+    img.onload = () => {
+      localStorage.setItem(`pokemon_image_${pokemon.id}`, pokemon.image_url);
+    };
+  });
+}
+
+function getCachedImageUrl(pokemonId) {
+  return localStorage.getItem(`pokemon_image_${pokemonId}`);
+}
+
 function displayPokemons(pokemons) {
   listWrapper.innerHTML = "";
 
   pokemons.forEach((pokemon) => {
+    const cachedImageUrl = getCachedImageUrl(pokemon.id);
+    const imageUrl = cachedImageUrl || pokemon.image_url;
+
     const listItem = document.createElement("div");
     listItem.className = "list-item";
     listItem.innerHTML = `
@@ -45,7 +64,7 @@ function displayPokemons(pokemons) {
             <p class="caption-fonts">#${pokemon.id}</p>
         </div>
         <div class="img-wrap">
-            <img src="${pokemon.image_url}" alt="${pokemon.name}" />
+            <img src="${imageUrl}" alt="${pokemon.name}" />
         </div>
         <div class="name-wrap">
             <p class="body3-fonts">#${pokemon.name}</p>
@@ -56,6 +75,8 @@ function displayPokemons(pokemons) {
       const success = await fetchPokemonDataBeforeRedirect(pokemon.id);
       if (success) {
         window.location.href = `./detail.html?id=${pokemon.id}`;
+      } else {
+        console.error(`Failed to fetch data for Pokémon ID: ${pokemon.id}`);
       }
     });