233 lines
7.7 KiB
PHP
233 lines
7.7 KiB
PHP
<?php
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namespace app\common\logic;
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use app\common\model\VehVehicleSku;
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/**
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* SKU 生成器
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* - 输入: 车辆规格数组(以 *_code 为主)
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* - 输出: 稳定、人读友好的 sku_code (<= 40 默认)
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*/
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final class SkuCodeBuilder
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{
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/** 压缩映射（可按需扩充） */
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private const ABBR = [
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// level
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'FLAGSHIP' => 'FLG',
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'PREMIUM' => 'PRM',
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'STANDARD' => 'STD',
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'DELUXE' => 'DLX',
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// edition
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'HONOR' => 'HNR',
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'CHAMPION' => 'CHP',
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'ANNIV' => 'ANV',
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// trans
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'1SPEED' => '1SP',
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// drive/fuel/body 等一般已短，不必压缩
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];
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/** 入口：生成 sku_code */
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public static function build(array $s, array $opts = []): string
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{
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$maxLen = $opts['max_len'] ?? 40;
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$ensureUnique = $opts['ensure_unique'] ?? true;
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$tokens = [
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'brand' => self::tok($s['brand_code'] ?? ''),
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'series' => self::tok($s['series_code'] ?? ''),
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'year' => isset($s['model_year']) ? (string)intval($s['model_year']) : '',
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'fuel' => self::tok($s['fuel_type_code'] ?? ''),
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'drive' => self::tok($s['drive_type_code'] ?? ''),
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'spec' => self::buildSpec($s, self::tok($s['fuel_type_code'] ?? '')),
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'level' => self::abbr(self::tok($s['trim_level_code'] ?? '')),
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'edition' => self::abbr(self::tok($s['edition_code'] ?? '')),
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];
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// 过滤空段并按既定顺序拼接
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$order = ['brand','series','year','fuel','drive','spec','level','edition'];
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$parts = [];
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foreach ($order as $k) {
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if (!empty($tokens[$k])) $parts[$k] = $tokens[$k];
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}
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$sku = self::normalizeSku(implode('-', $parts));
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if (strlen($sku) > $maxLen) {
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$sku = self::shrink($parts, $maxLen); // 传入“带键名的 parts”
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}
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if ($ensureUnique) {
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$sku = self::ensureUnique($sku, $maxLen);
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}
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return $sku;
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}
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/** 构造规格位(SPEC)，按能源类型差异化 */
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private static function buildSpec(array $s, string $fuel): string
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{
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$fuel = strtoupper($fuel);
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if ($fuel === 'EV') {
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if (!empty($s['range_km'])) {
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$r = (int)$s['range_km'];
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$r10 = (int)round($r / 10) * 10; // 到 10 位
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return (string)$r10;
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}
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if (!empty($s['battery_kwh'])) {
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return self::numToken($s['battery_kwh']) . 'KWH';
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}
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return '';
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}
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if ($fuel === 'GAS') {
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$bits = [];
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if (!empty($s['engine_disp_l'])) {
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$bits[] = self::dispToken($s['engine_disp_l']); // 1.5L -> 15L
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}
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if (!empty($s['engine_turbo']) && intval($s['engine_turbo']) === 1) {
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$bits[] = 'T';
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}
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if (!empty($s['transmission_code'])) {
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$bits[] = self::abbr(self::tok($s['transmission_code']));
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}
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return implode('', $bits); // 如 15LTCVT
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}
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// HEV/PHEV/EREV 等
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$bits = [];
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if (!empty($s['engine_disp_l'])) {
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$bits[] = self::dispToken($s['engine_disp_l']); // 可空
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}
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if (!empty($s['motor_layout_code'])) {
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$bits[] = self::tok($s['motor_layout_code']); // 如 AWD / DM-I / DM-P
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}
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return implode('', $bits);
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}
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/** 冲突检测并追加短校验（全局唯一） */
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private static function ensureUnique(string $sku, int $maxLen): string
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{
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if (!VehVehicleSku::where('sku_code', $sku)->exists()) {
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return $sku;
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}
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// 用 crc32 生成 5~6 位 base36 校验（稳定且短）
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$crc = self::base36Crc($sku);
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$suffix = '-X' . $crc;
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if (strlen($sku . $suffix) > $maxLen) {
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$sku = substr($sku, 0, max(0, $maxLen - strlen($suffix)));
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$sku = rtrim($sku, '-'); // 避免尾部 '-'
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}
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$sku .= $suffix;
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// 若极端情况下仍冲突，追加递增计数
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$i = 2;
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$candidate = $sku;
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while (VehVehicleSku::where('sku_code', $candidate)->exists()) {
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$extra = '-'.$i;
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$cut = max(0, $maxLen - strlen($extra));
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$candidate = substr($sku, 0, $cut) . $extra;
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$i++;
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}
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return $candidate;
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}
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/** 把 token 数组尽量压到 maxLen（逐步压缩策略） */
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private static function shrink(array $partsByKey, int $maxLen): string
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{
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// 1) 先对 series/level/edition 做激进压缩
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$p = $partsByKey;
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foreach (['series','level','edition'] as $k) {
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if (!empty($p[$k])) $p[$k] = self::heavyAbbr($p[$k]);
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}
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$sku = self::normalizeSku(implode('-', $p));
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if (strlen($sku) <= $maxLen) return $sku;
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// 2) 依次移除不太关键的信息：edition → level（若存在）
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if (!empty($p['edition'])) { unset($p['edition']); }
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$sku = self::normalizeSku(implode('-', $p));
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if (strlen($sku) <= $maxLen) return $sku;
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if (!empty($p['level'])) { unset($p['level']); }
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$sku = self::normalizeSku(implode('-', $p));
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if (strlen($sku) <= $maxLen) return $sku;
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// 3) 压缩 spec（如去 KM/KWH，仅保留核心）
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if (!empty($p['spec'])) { $p['spec'] = self::compactSpec($p['spec']); }
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$sku = self::normalizeSku(implode('-', $p));
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if (strlen($sku) <= $maxLen) return $sku;
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// 4) 仍超长：从右向左截断次要段（spec/drive/year），保留前三段（brand/series/fuel）优先
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$dropOrder = ['spec','drive','year'];
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$q = $p;
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foreach ($dropOrder as $k) {
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if (!empty($q[$k])) { unset($q[$k]); }
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$sku = self::normalizeSku(implode('-', $q));
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if (strlen($sku) <= $maxLen) return $sku;
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}
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// 5) 最后兜底：硬截到 maxLen，后续 ensureUnique 会追加 -X 校验并避免冲突
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return substr(self::normalizeSku(implode('-', $p)), 0, $maxLen);
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}
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/* ===== Helpers ===== */
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private static function tok($v): string
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{
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$v = strtoupper((string)$v);
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return preg_replace('/[^A-Z0-9_]/', '', $v ?? '');
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}
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private static function abbr(string $t): string
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{
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return self::ABBR[$t] ?? $t;
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}
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private static function heavyAbbr(string $t): string
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{
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// 更激进：去除元音，连字符化
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$t = str_replace(['STANDARD','FLAGSHIP','PREMIUM','DELUXE'], ['STD','FLG','PRM','DLX'], $t);
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$t = preg_replace('/[AEIOU]/', '', $t);
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return $t;
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}
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private static function compactSpec(string $s): string
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{
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// 规则：去 KM/KWH 等单位，只保留数字与核心字母
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$s = strtoupper($s);
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$s = str_replace(['KM','KWH'], '', $s);
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return $s;
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}
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private static function numToken($v): string
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{
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return preg_replace('/[^0-9]/', '', (string)$v);
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}
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/** 1.5L -> 15L；2.0L -> 20L */
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private static function dispToken($l): string
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{
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$x = (float)$l;
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return (string)round($x * 10) . 'L';
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}
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private static function base36Crc(string $s): string
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{
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$crc = sprintf('%u', crc32($s)); // 无符号
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$n = (int)$crc;
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$chars = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ';
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$res = '';
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do {
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$res = $chars[$n % 36] . $res;
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$n = intdiv($n, 36);
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} while ($n > 0);
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return substr($res, -6); // 取后6位足够
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}
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private static function normalizeSku(string $s): string
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{
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// 连续的 '-' 合并，首尾修剪
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$s = preg_replace('/-+/', '-', $s);
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$s = trim($s, '-');
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return $s;
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}
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} |