1 files changed, 45 insertions, 0 deletions
diff --git a/build.js b/build.js
new file mode 100644
index 0000000..c7b8f39
--- /dev/null
+++ b/build.js
@@ -0,0 +1,45 @@
+const fs = require("fs");
+const path = require('path');
+const M = require("mustache");
+
+// https://stackabuse.com/how-to-split-an-array-into-even-chunks-in-javascript/
+function sliceIntoChunks(arr, chunkSize) {
+    const res = [];
+    for (let i = 0; i < arr.length; i += chunkSize) {
+        const chunk = arr.slice(i, i + chunkSize);
+        res.push(chunk);
+    }
+    return res;
+}
+
+// https://stackoverflow.com/questions/17428587/transposing-a-2d-array-in-javascript
+function transpose(matrix) {
+    return matrix[0].map((col, i) => matrix.map(row => row[i]));
+}
+
+const GALLERY_DIR = "_gallery";
+const SRC_DIR = "src";
+const DIST_DIR = "dist";
+const HTML_TEMP_PATH = path.join(SRC_DIR, "index.html.mustache");
+const HTML_OUT_PATH = path.join(DIST_DIR, "index.html");
+
+fs.rmSync(DIST_DIR, { recursive: true, force: true });
+fs.cpSync(SRC_DIR, DIST_DIR, { recursive: true });
+
+const htmlTemplate = fs.readFileSync(HTML_TEMP_PATH, "utf-8");
+
+const galleryJsonList = fs.readdirSync(GALLERY_DIR);
+const galleryViews = galleryJsonList
+    .map((fileName) => fs.readFileSync(path.join(GALLERY_DIR, fileName), "utf-8"))
+    .map(JSON.parse)
+    .map((gallery) => {
+        const rows = sliceIntoChunks(gallery["images"], gallery["column_count"]);
+        const columns = transpose(rows);
+        return {
+            ...gallery,
+            columns,
+        };
+    });
+
+const renderedHtml = M.render(htmlTemplate, { galleries: galleryViews} );
+fs.writeFileSync(HTML_OUT_PATH, renderedHtml);