web: render charts with uplot

web/scripts/copy-uplot.js

@@ -0,0 +1,55 @@
+/*
+ * Copyright © 2025-26 l5yth & contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { mkdir, copyFile, access } from 'node:fs/promises';
+import { constants as fsConstants } from 'node:fs';
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+/**
+ * Resolve an absolute path relative to this script location.
+ *
+ * @param {string[]} segments Path segments to append.
+ * @returns {string} Absolute path resolved from this script.
+ */
+function resolvePath(...segments) {
+  const scriptDir = path.dirname(fileURLToPath(import.meta.url));
+  return path.resolve(scriptDir, ...segments);
+}
+
+/**
+ * Ensure the uPlot assets are available within the public asset tree.
+ *
+ * @returns {Promise<void>} Resolves once files have been copied.
+ */
+async function copyUPlotAssets() {
+  const sourceDir = resolvePath('..', 'node_modules', 'uplot', 'dist');
+  const targetDir = resolvePath('..', 'public', 'assets', 'vendor', 'uplot');
+  const assets = ['uPlot.iife.min.js', 'uPlot.min.css'];
+
+  await access(sourceDir, fsConstants.R_OK);
+  await mkdir(targetDir, { recursive: true });
+
+  await Promise.all(
+    assets.map(async asset => {
+      const source = path.join(sourceDir, asset);
+      const target = path.join(targetDir, asset);
+      await copyFile(source, target);
+    }),
+  );
+}
+
+await copyUPlotAssets();