add: script to generate thumbnails

scripts/build.js

@@ -1,8 +1,8 @@
 const fs = require("fs");
 const path = require("path");
 
-const repoRoot = path.resolve(__dirname, "..");
-const mealsPath = path.join(repoRoot, "data", "meals.json");
+const { loadMeals, repoRoot } = require("./lib/meals");
+
 const indexTemplatePath = path.join(repoRoot, "templates", "index.html");
 const indexOutputPath = path.join(repoRoot, "index.html");
 
@@ -17,28 +17,6 @@ function escapeHtml(value) {
     .replace(/"/g, """);
 }
 
-function validateMeals(meals) {
-  if (!Array.isArray(meals)) {
-    throw new Error("data/meals.json must contain an array");
-  }
-
-  for (const [index, meal] of meals.entries()) {
-    if (!meal || typeof meal !== "object") {
-      throw new Error(`Meal at index ${index} must be an object`);
-    }
-
-    for (const field of ["id", "title", "description"]) {
-      if (typeof meal[field] !== "string" || meal[field].length === 0) {
-        throw new Error(`Meal ${index} is missing required string field "${field}"`);
-      }
-    }
-
-    if (meal.position !== undefined && typeof meal.position !== "string") {
-      throw new Error(`Meal ${index} has a non-string "position" value`);
-    }
-  }
-}
-
 function renderGalleryItem(meal, eol) {
   const attrs = [`class="thumbnail"`, `href="images/fulls/${meal.id}.jpg"`];
 
@@ -72,9 +50,7 @@ function replaceBlock(template, token, replacement) {
 function buildIndex() {
   const template = fs.readFileSync(indexTemplatePath, "utf8");
   const eol = detectEol(template);
-  const meals = JSON.parse(fs.readFileSync(mealsPath, "utf8"));
-
-  validateMeals(meals);
+  const meals = loadMeals();
 
   return replaceBlock(template, "gallery_items", renderGallery(meals, eol));
 }