migrate to bootstrap (#14)

src/main/resources/static/utils.js

@@ -0,0 +1,44 @@
+function createAlert(message, placeholder) {
+    const wrapper = document.createElement('div');
+    wrapper.innerHTML = `<div class="alert alert-danger alert-dismissible" role="alert">${safe(message)}<button type="button" class="btn-close" data-bs-dismiss="alert" aria-label="Close"></button></div>`;
+    placeholder.append(wrapper);
+}
+
+function formatPlayerId(obj) {
+    return `${obj.nick} (${obj.job})`;
+}
+
+function getCurrentOption(select) {
+    return select.find(":selected")[0];
+}
+
+function getPartyId() {
+    const request = new XMLHttpRequest();
+    request.open("HEAD", document.location, false);
+    request.send(null);
+
+    // tuple lol
+    return [
+        request.getResponseHeader("X-Party-Id"),
+        request.getResponseHeader("X-User-Permission") === "get",
+    ]
+}
+
+function requestAlert(jqXHR, errorThrown) {
+    let message;
+    try {
+        message = $.parseJSON(jqXHR.responseText).message;
+    } catch (_) {
+        message = errorThrown;
+    }
+    const alert = $("#alert-placeholder");
+    createAlert(`Error during request: ${message}`, alert);
+}
+
+function safe(string) {
+    return String(string)
+        .replace(/&/g, "&amp;")
+        .replace(/</g, "&lt;")
+        .replace(/>/g, "&gt;")
+        .replace(/"/g, "&quot;");
+}