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Add workout manager tool and worker backend (#26)
## Summary - add a Workout Manager frontend for listing, viewing, creating, and deleting workout templates against the Worker API - implement the workouts Cloudflare Worker with KV-backed CRUD endpoints, CORS, and token auth - extend the deployment workflow to ship the new worker ------ [Codex Task](https://chatgpt.com/codex/tasks/task_e_691f374947d8832581460121d84ca552)
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‎.github/workflows/deploy-cloudflare-workers.yml‎

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pull-requests: read
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outputs:
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social_link_preview: ${{ steps.filter.outputs.social-link-preview }}
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workouts: ${{ steps.filter.outputs.workouts }}
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# If I add more filters below, I need to “export them” here.
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steps:
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- uses: actions/checkout@v4
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filters: |
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social-link-preview:
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- 'cloudflare-workers/social-link-preview/**'
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workouts:
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- 'cloudflare-workers/workouts/**'
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# I can add more filters here and access them separately.
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deploy-social-link-preview:
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CLOUDFLARE_ACCOUNT_ID: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
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run: |
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wrangler deploy --env production
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deploy-workouts:
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name: Deploy Workouts Worker
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runs-on: ubuntu-latest
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needs: changes
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if: ${{ github.event_name == 'workflow_dispatch' || needs.changes.outputs.workouts == 'true' }}
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steps:
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- name: Checkout code
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uses: actions/checkout@v4
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- name: Setup Node.js
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uses: actions/setup-node@v4
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with:
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node-version: '20'
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- name: Install Wrangler
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run: npm install -g wrangler
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- name: Deploy to Cloudflare Workers
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working-directory: cloudflare-workers/workouts
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env:
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CLOUDFLARE_API_TOKEN: ${{ secrets.CLOUDFLARE_API_TOKEN }}
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CLOUDFLARE_ACCOUNT_ID: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
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run: |
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wrangler deploy --env production

‎cloudflare-workers/workouts/worker.js‎

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const FRONTEND_ORIGIN = "https://tools.mathspp.com";
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const WORKOUTS_KEY = "user:me:workouts";
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function corsHeaders() {
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return {
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"Access-Control-Allow-Origin": FRONTEND_ORIGIN,
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"Access-Control-Allow-Methods": "GET, POST, PUT, DELETE, OPTIONS",
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"Access-Control-Allow-Headers": "Content-Type, Authorization",
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"Vary": "Origin",
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};
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}
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function jsonResponse(body, status = 200) {
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return new Response(JSON.stringify(body), {
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status,
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headers: {
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"Content-Type": "application/json; charset=utf-8",
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...corsHeaders(),
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},
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});
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}
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function unauthorizedResponse() {
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return jsonResponse({ error: "Unauthorized" }, 401);
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}
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function isAuthorized(request, env) {
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const auth = request.headers.get("Authorization") || "";
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const expected = `Bearer ${env.WORKOUT_API_TOKEN}`;
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return auth === expected;
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}
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function handleOptions() {
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return new Response(null, { status: 204, headers: corsHeaders() });
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}
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async function readJson(request) {
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try {
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return await request.json();
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} catch (error) {
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return { error: "Invalid JSON body" };
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}
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}
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async function getWorkouts(env) {
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const workouts = await env.WORKOUTS.get(WORKOUTS_KEY, "json");
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return Array.isArray(workouts) ? workouts : [];
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}
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async function saveWorkouts(env, workouts) {
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await env.WORKOUTS.put(WORKOUTS_KEY, JSON.stringify(workouts));
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}
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function normalizeExerciseBlock(block) {
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if (!block || typeof block !== "object") {
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return null;
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}
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const name = typeof block.name === "string" ? block.name.trim() : "";
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const sets = Number.isFinite(Number(block.sets)) ? Number(block.sets) : 0;
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const repRange = block.repRange || {};
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const min = Number.isFinite(Number(repRange.min)) ? Number(repRange.min) : 0;
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const max = Number.isFinite(Number(repRange.max)) ? Number(repRange.max) : 0;
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const notes = typeof block.notes === "string" ? block.notes : "";
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if (!name) {
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return null;
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}
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return {
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id: block.id || crypto.randomUUID(),
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name,
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sets: sets < 0 ? 0 : Math.round(sets),
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repRange: {
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min,
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max,
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},
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notes,
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};
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}
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function updateTimestamps(existing) {
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const now = new Date().toISOString();
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if (!existing.createdAt) {
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existing.createdAt = now;
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}
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existing.updatedAt = now;
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return existing;
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}
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function findWorkout(workouts, id) {
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return workouts.find((workout) => workout.id === id);
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}
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export default {
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async fetch(request, env) {
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const url = new URL(request.url);
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if (request.method === "OPTIONS") {
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return handleOptions();
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}
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if (!isAuthorized(request, env)) {
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return unauthorizedResponse();
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}
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if (url.pathname === "/api/workouts" && request.method === "GET") {
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const workouts = await getWorkouts(env);
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return jsonResponse(workouts);
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}
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if (url.pathname === "/api/workouts" && request.method === "POST") {
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const body = await readJson(request);
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if (body.error) {
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return jsonResponse({ error: body.error }, 400);
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}
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const name = typeof body.name === "string" ? body.name.trim() : "";
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if (!name) {
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return jsonResponse({ error: "Workout name is required" }, 400);
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}
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const exerciseBlocksInput = Array.isArray(body.exerciseBlocks)
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? body.exerciseBlocks
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: [];
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const normalizedBlocks = exerciseBlocksInput
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.map(normalizeExerciseBlock)
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.filter(Boolean);
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if (normalizedBlocks.length === 0) {
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return jsonResponse({ error: "At least one exercise block is required" }, 400);
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}
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const workouts = await getWorkouts(env);
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const workout = updateTimestamps({
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id: body.id || crypto.randomUUID(),
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name,
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exerciseBlocks: normalizedBlocks,
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createdAt: undefined,
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updatedAt: undefined,
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});
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workouts.push(workout);
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await saveWorkouts(env, workouts);
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return jsonResponse(workout, 201);
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}
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if (url.pathname.startsWith("/api/workouts/")) {
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const id = decodeURIComponent(url.pathname.replace("/api/workouts/", ""));
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if (!id) {
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return jsonResponse({ error: "Workout id is required" }, 400);
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}
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const workouts = await getWorkouts(env);
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const existing = findWorkout(workouts, id);
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if (!existing) {
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return jsonResponse({ error: "Workout not found" }, 404);
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}
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if (request.method === "GET") {
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return jsonResponse(existing);
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}
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if (request.method === "DELETE") {
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const updated = workouts.filter((workout) => workout.id !== id);
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await saveWorkouts(env, updated);
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return jsonResponse({ success: true });
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}
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if (request.method === "PUT") {
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const body = await readJson(request);
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if (body.error) {
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return jsonResponse({ error: body.error }, 400);
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}
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const name = typeof body.name === "string" ? body.name.trim() : existing.name;
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const exerciseBlocksInput = Array.isArray(body.exerciseBlocks)
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? body.exerciseBlocks
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: existing.exerciseBlocks;
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const normalizedBlocks = exerciseBlocksInput
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.map(normalizeExerciseBlock)
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.filter(Boolean);
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if (normalizedBlocks.length === 0) {
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return jsonResponse({ error: "At least one exercise block is required" }, 400);
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}
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existing.name = name;
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existing.exerciseBlocks = normalizedBlocks;
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updateTimestamps(existing);
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await saveWorkouts(env, workouts);
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return jsonResponse(existing);
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}
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}
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return jsonResponse({ error: "Not found" }, 404);
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},
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};

‎cloudflare-workers/workouts/wrangler.toml‎

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name = "workouts-production"
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main = "worker.js"
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compatibility_date = "2025-02-15"
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kv_namespaces = [
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{ binding = "WORKOUTS", id = "replace-with-your-kv-id" }
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]
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[env.production]
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name = "workouts-production"

‎workout-manager.docs.md‎

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Manage workout templates stored in the paired Cloudflare Worker. Save your API base URL and token, list all templates, inspect a template’s exercise blocks with timing estimates, delete unwanted templates, and build new templates with reorderable exercise blocks and notes.

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