https://broadbandswitch.uk/assets/js/stickee-loader.js

1(() => {
2  const LOADER_SRC = 'https://whitelabels.stickeebroadband.co.uk/js/loader.js';
3  const DEBUG = new URLSearchParams(window.location.search).has('debugWidget');
4  const STATE_KEY = '__BS_STICKEE_LOADER_STATE__';
5
6  const state = window[STATE_KEY] || (window[STATE_KEY] = {
7    promise: null,
8    ready: false
9  });
10
11  const debugLog = (...args) => {
12    if (!DEBUG) return;
13    console.info('[BS widget]', ...args);
14  };
15
16  function findExistingScript() {
17    return Array.from(document.scripts).find((script) => script.src === LOADER_SRC) || null;
18  }
19
20  function ensureLoaderScript() {
21    if (state.ready) return Promise.resolve();
22    if (state.promise) return state.promise;
23
24    state.promise = new Promise((resolve, reject) => {
25      const existing = findExistingScript();
26      if (existing) {
27        if (existing.dataset.bsReady === '1') {
28          state.ready = true;
29          debugLog('loader ready');
30          resolve();
31          return;
32        }
33        existing.addEventListener('load', () => {
34          state.ready = true;
35          existing.dataset.bsReady = '1';
36          debugLog('loader ready');
37          resolve();
38        }, { once: true });
39        existing.addEventListener('error', () => {
40          debugLog('loader error');
41          state.promise = null;
42          reject(new Error('Stickee loader failed to load.'));
43        }, { once: true });
44        return;
45      }
46
47      const script = document.createElement('script');
48      script.src = LOADER_SRC;
49      script.async = true;
50      script.dataset.bsInjected = '1';
51      script.addEventListener('load', () => {
52        state.ready = true;
53        script.dataset.bsReady = '1';
54        debugLog('loader ready');
55        resolve();
56      }, { once: true });
57      script.addEventListener('error', () => {
58        debugLog('loader error');
59        state.promise = null;
60        reject(new Error('Stickee loader failed to load.'));
61      }, { once: true });
62      document.head.appendChild(script);
63    });
64
65    return state.promise;
66  }
67
68  function ensure(options = {}) {
69    const timeoutMs = Number(options.timeoutMs) > 0 ? Number(options.timeoutMs) : 12000;
70    return Promise.race([
71      ensureLoaderScript(),
72      new Promise((_, reject) => {
73        setTimeout(() => reject(new Error(`Stickee loader timed out after ${timeoutMs}ms.`)), timeoutMs);
74      })
75    ]);
76  }
77
78  function prewarm(reason = 'unknown') {
79    debugLog(`prewarm requested: ${reason}`);
80    ensure({ timeoutMs: 12000 }).catch((error) => {
81      debugLog(`prewarm failed: ${error.message}`);
82    });
83  }
84
85  window.BSStickeeLoader = {
86    ensure,
87    prewarm,
88    isReady: () => Boolean(state.ready)
89  };
90})();