refactor: clean up gallery tooling and document the workflow

scripts/lib/meals.js

@@ -3,6 +3,12 @@ const path = require("path");
 
 const repoRoot = path.resolve(__dirname, "..", "..");
 const mealsPath = path.join(repoRoot, "data", "meals.json");
+const fullsDir = path.join(repoRoot, "images", "fulls");
+const thumbsDir = path.join(repoRoot, "images", "thumbs");
+
+function isNonEmptyString(value) {
+  return typeof value === "string" && value.trim().length > 0;
+}
 
 function validateThumbnail(meal, index) {
   if (meal.thumbnail === undefined) {
@@ -55,7 +61,7 @@ function validateMeals(meals) {
     }
 
     for (const field of ["id", "title", "description"]) {
-      if (typeof meal[field] !== "string" || meal[field].length === 0) {
+      if (!isNonEmptyString(meal[field])) {
         throw new Error(`Meal ${index} is missing required string field "${field}"`);
       }
     }
@@ -64,8 +70,8 @@ function validateMeals(meals) {
       throw new Error(`Meal ${index} has a non-numeric id "${meal.id}"`);
     }
 
-    if (meal.position !== undefined && typeof meal.position !== "string") {
-      throw new Error(`Meal ${index} has a non-string "position" value`);
+    if (meal.position !== undefined && !isNonEmptyString(meal.position)) {
+      throw new Error(`Meal ${index} has an invalid "position" value`);
     }
 
     if (ids.has(meal.id)) {
@@ -91,6 +97,49 @@ function saveMeals(meals) {
   fs.writeFileSync(mealsPath, `${JSON.stringify(meals, null, 2)}\n`);
 }
 
+function getMealImagePaths(mealOrId) {
+  const mealId =
+    typeof mealOrId === "string" ? mealOrId : mealOrId && typeof mealOrId.id === "string" ? mealOrId.id : null;
+
+  if (!mealId) {
+    throw new Error("Expected a meal object or meal id string");
+  }
+
+  return {
+    fullPath: path.join(fullsDir, `${mealId}.jpg`),
+    thumbPath: path.join(thumbsDir, `${mealId}.jpg`),
+  };
+}
+
+function validateMealAssets(meals, options = {}) {
+  const settings = {
+    requireFull: true,
+    requireThumb: true,
+    ...options,
+  };
+  const missingAssets = [];
+
+  for (const meal of meals) {
+    const { fullPath, thumbPath } = getMealImagePaths(meal);
+
+    if (settings.requireFull && !fs.existsSync(fullPath)) {
+      missingAssets.push(
+        `Meal ${meal.id} is missing full-size image: ${path.relative(repoRoot, fullPath)}`
+      );
+    }
+
+    if (settings.requireThumb && !fs.existsSync(thumbPath)) {
+      missingAssets.push(
+        `Meal ${meal.id} is missing thumbnail image: ${path.relative(repoRoot, thumbPath)}`
+      );
+    }
+  }
+
+  if (missingAssets.length > 0) {
+    throw new Error(`Missing image assets:\n${missingAssets.join("\n")}`);
+  }
+}
+
 function getNextMealId(meals) {
   if (meals.length === 0) {
     return "01";
@@ -108,9 +157,13 @@ function getNextMealId(meals) {
 }
 
 module.exports = {
+  fullsDir,
   getNextMealId,
+  getMealImagePaths,
   loadMeals,
   mealsPath,
   repoRoot,
   saveMeals,
+  thumbsDir,
+  validateMealAssets,
 };