89 lines
4.4 KiB
PHP
89 lines
4.4 KiB
PHP
<?php
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/** api#326: внешняя граница UTM; semantic-контекст шаблонов остаётся прежним. */
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declare(strict_types=1);
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function prelandUtmEnums(): array
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{
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return ['theme'=>['1'=>'dark','2'=>'light'], 'reg'=>['1'=>'before','2'=>'after'], 'banch'=>['1'=>'b','2'=>'a'], 'focus'=>['1'=>'face','2'=>'center']];
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}
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/** Совместимость host-config при доставке кода до точечной миграции. */
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function prelandNumericUtmConfig(array $config): array
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{
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$settings = is_array($config['utm'] ?? null) ? $config['utm'] : [];
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foreach (['registration'=>'reg','chob'=>'banch','bchoice'=>'banch'] as $old=>$new) {
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if (!isset($settings[$new]) && isset($settings[$old])) $settings[$new] = $settings[$old];
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unset($settings[$old]);
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}
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unset($settings['chb']);
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foreach (prelandUtmEnums() as $key=>$map) {
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if (!is_array($settings[$key] ?? null)) continue;
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$weights=[];
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foreach ((array)($settings[$key]['weights'] ?? []) as $variant=>$weight) {
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$digit=array_search((string)$variant,$map,true);
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$weights[$digit === false ? $variant : $digit]=$weight;
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}
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$settings[$key]['weights']=$weights;
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$default=$settings[$key]['default'] ?? null;
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$digit=array_search($default,$map,true);
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if ($digit !== false) $settings[$key]['default']=(string)$digit;
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}
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$config['utm']=$settings;
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return $config;
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}
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/** Выбирает random один раз, до рендера/сохранения загрузки. */
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function prelandResolveUtm(array $query, array $config): array
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{
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$config=prelandNumericUtmConfig($config);
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$defaults=['indpic'=>'1','theme'=>'2','degr'=>'1','reg'=>'2','banch'=>'2','tp'=>'1','cons'=>'2','focus'=>'1'];
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$enums=prelandUtmEnums(); $digits=[]; $context=$query;
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foreach (['registration','bchoice','chob','chb'] as $old) unset($context[$old]);
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foreach ($defaults as $key=>$fallback) {
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unset($context[$key]);
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$settings=$config['utm'][$key] ?? [];
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$valid=static fn($digit): bool => preg_match('/^[1-9]$/D',(string)$digit)===1
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&& (!isset($enums[$key]) || isset($enums[$key][$digit]))
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&& (in_array($key,['cons','theme','reg','banch','focus'],true) || isset($settings['weights'][$digit]));
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$default=(string)($settings['default'] ?? $fallback);
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if (!$valid($default)) $default=$fallback;
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$value=$query[$key] ?? null;
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$digit=is_string($value) && preg_match('/\A.{4}([0-9])/us',$value,$match) ? $match[1] : null;
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if ($digit==='0') {
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// Generic resolver исторически выбирает первый ключ при sum<=0;
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// cons имеет отдельный контракт: только положительные веса и default.
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if ($key !== 'cons') {
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$weights=(array)($settings['weights'] ?? []);
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$total=array_sum($weights);
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$digit=$weights ? (string)array_key_first($weights) : $default;
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if ($total>0 && is_finite((float)$total)) {
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$point=mt_rand()/mt_getrandmax()*$total; $current=0.0;
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foreach ($weights as $variant=>$weight) {
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$current+=(float)$weight;
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$digit=(string)$variant;
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if ($point<=$current) break;
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}
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}
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} else {
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$weights=[];
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foreach ((array)($settings['weights'] ?? []) as $variant=>$weight) {
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if ($valid($variant) && is_numeric($weight) && is_finite((float)$weight) && (float)$weight>0) $weights[$variant]=(float)$weight;
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}
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$total=array_sum($weights); $digit=$default;
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if ($total>0 && is_finite($total)) {
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$point=mt_rand()/(mt_getrandmax()+1.0)*$total;
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foreach ($weights as $variant=>$weight) {
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if ($point<$weight) { $digit=(string)$variant; break; }
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$point-=$weight;
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}
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}
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}
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}
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if (!$valid($digit ?? '')) $digit=$default;
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$digits[$key]=$digit;
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$internal=['reg'=>'registration','banch'=>'bchoice'][$key] ?? $key;
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$context[$internal]=$enums[$key][$digit] ?? $digit;
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}
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return ['digits'=>$digits,'context'=>$context];
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}
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