42 lines
2.0 KiB
PHP
42 lines
2.0 KiB
PHP
<?php
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/** api#326: новый шум при каждой навигации; recovery хранит выбранные цифры. */
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return <<<'JS'
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(function () {
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const keys = ['indpic','theme','degr','reg','chob','tp','cons','focus'];
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const enums = {theme:{dark:'1',light:'2'},reg:{before:'1',after:'2'},chob:{b:'1',a:'2'},focus:{face:'1',center:'2'}};
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const legacy = {reg:'registration',chob:'bchoice'};
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const valid = (key, value) => /^[1-9]$/.test(value || '') && (!enums[key] || Object.values(enums[key]).includes(value));
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function restore(meta, defaults) {
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const query = new URLSearchParams(meta.redirectUtm || '');
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const digits = {};
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for (const key of keys) {
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let value = meta.utmDigits?.[key];
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if (!valid(key, value)) {
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// Только сохранённый record: старые enum/открытые цифры не являются raw URL alias.
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const stored = query.get(legacy[key] || key) ?? query.get(key);
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value = enums[key]?.[stored] || stored;
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if (!valid(key, value)) value = Array.from(stored || '')[4];
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}
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digits[key] = valid(key, value) ? value : defaults[key];
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}
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return digits;
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}
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const alphabet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
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function mask(digit) {
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const bytes = new Uint8Array(10);
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crypto.getRandomValues(bytes);
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const chars = Array.from(bytes, value => alphabet[value % alphabet.length]);
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chars[4] = digit;
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return chars.join('');
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}
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function query(meta, defaults) {
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const params = new URLSearchParams(meta.redirectUtm || '');
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const digits = restore(meta, defaults);
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for (const key of ['registration','bchoice','chb','key','shown_theme',...keys]) params.delete(key);
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for (const key of keys) params.set(key, mask(digits[key]));
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return params.toString();
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}
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window.ZoomzillaUtmHandoff = {restore, query};
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})();
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JS;
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