Update Python tools

python-tools/static/app.js

@@ -17,3 +17,88 @@ if (output) {
   refresh();
   window.setInterval(refresh, 2000);
 }
+
+for (const form of document.querySelectorAll("form[data-wait-for-result]")) {
+  const result = form.querySelector(".task-result");
+  const controls = [...form.querySelectorAll("input, select, button")];
+  let waiting = false;
+
+  const warnBeforeLeaving = (event) => {
+    event.preventDefault();
+    event.returnValue = "";
+  };
+
+  const setWaiting = (value) => {
+    waiting = value;
+    form.classList.toggle("is-waiting", value);
+    controls.forEach((control) => {
+      control.disabled = value;
+    });
+    if (value) {
+      window.addEventListener("beforeunload", warnBeforeLeaving);
+    } else {
+      window.removeEventListener("beforeunload", warnBeforeLeaving);
+    }
+  };
+
+  const showResult = (message, kind, detailUrl) => {
+    result.replaceChildren();
+    result.className = `task-result ${kind}`;
+    result.append(message);
+    if (detailUrl) {
+      const link = document.createElement("a");
+      link.href = detailUrl;
+      link.textContent = "View details";
+      result.append(" ", link);
+    }
+  };
+
+  const waitForRun = async (run) => {
+    while (true) {
+      const response = await fetch(run.state_url, { cache: "no-store" });
+      if (!response.ok) {
+        throw new Error("Could not read task status.");
+      }
+      const state = await response.json();
+      if (state.status !== "queued" && state.status !== "running") {
+        if (state.status === "succeeded") {
+          showResult("Completed successfully.", "succeeded", run.detail_url);
+        } else {
+          showResult(`Finished with status: ${state.status}.`, "failed", run.detail_url);
+        }
+        return;
+      }
+      await new Promise((resolve) => window.setTimeout(resolve, 500));
+    }
+  };
+
+  form.addEventListener("submit", async (event) => {
+    if (waiting) {
+      event.preventDefault();
+      return;
+    }
+    if (!form.reportValidity()) {
+      return;
+    }
+    event.preventDefault();
+    setWaiting(true);
+    showResult("Running...", "running");
+    try {
+      const response = await fetch(form.action, {
+        method: "POST",
+        body: new FormData(form),
+        headers: { Accept: "application/json" },
+      });
+      const data = await response.json();
+      if (!response.ok) {
+        const messages = data.errors ? Object.values(data.errors).join(" ") : "Could not start task.";
+        throw new Error(messages);
+      }
+      await waitForRun(data);
+    } catch (error) {
+      showResult(error instanceof Error ? error.message : "Could not run task.", "failed");
+    } finally {
+      setWaiting(false);
+    }
+  });
+}