Initial Product release

src/data/canvas-sizes.js

@@ -0,0 +1,33 @@
+async function fetchCanvasSizesData(pool) {
+  const [canvasSizes] = await pool.query('SELECT * FROM canvas_sizes ORDER BY width ASC, height ASC, name ASC');
+  return { canvasSizes };
+}
+
+async function fetchCanvasSizeById(pool, id) {
+  const [rows] = await pool.query('SELECT * FROM canvas_sizes WHERE id = ?', [id]);
+  return rows[0] || null;
+}
+
+function buildCanvasSizePayload(req, existingCanvasSize) {
+  const name = String(req.body.name || '').trim();
+  const width = Math.max(1, Number(req.body.width || (existingCanvasSize && existingCanvasSize.width) || 0));
+  const height = Math.max(1, Number(req.body.height || (existingCanvasSize && existingCanvasSize.height) || 0));
+
+  if (!name) {
+    const error = new Error('Canvas size name is required.');
+    error.statusCode = 400;
+    throw error;
+  }
+
+  return {
+    name,
+    width,
+    height
+  };
+}
+
+module.exports = {
+  fetchCanvasSizesData,
+  fetchCanvasSizeById,
+  buildCanvasSizePayload
+};