66 lines
1.4 KiB
PHP
66 lines
1.4 KiB
PHP
<?php
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namespace App\Services;
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class SmsMessageAnalyzer
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{
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private const GSM_SINGLE_LIMIT = 160;
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private const GSM_MULTI_LIMIT = 153;
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private const UCS2_SINGLE_LIMIT = 70;
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private const UCS2_MULTI_LIMIT = 67;
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public function characterCount(string $message): int
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{
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return mb_strlen($message);
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}
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public function isGsm7(string $message): bool
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{
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if ($message === '') {
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return true;
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}
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return ! preg_match('/[^\x00-\x7F]/', $message);
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}
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public function estimatedParts(string $message): int
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{
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$length = $this->characterCount($message);
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if ($length === 0) {
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return 0;
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}
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if ($this->isGsm7($message)) {
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if ($length <= self::GSM_SINGLE_LIMIT) {
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return 1;
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}
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return (int) ceil($length / self::GSM_MULTI_LIMIT);
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}
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if ($length <= self::UCS2_SINGLE_LIMIT) {
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return 1;
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}
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return (int) ceil($length / self::UCS2_MULTI_LIMIT);
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}
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public function summary(string $message): string
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{
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$characters = $this->characterCount($message);
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$parts = $this->estimatedParts($message);
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if ($parts === 0) {
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return '0 characters';
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}
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$partLabel = $parts === 1 ? '1 SMS' : "{$parts} SMS";
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return "{$characters} characters · {$partLabel}";
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}
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}
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