45 lines
1.6 KiB
C#
45 lines
1.6 KiB
C#
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using Microsoft.Extensions.Caching.Memory;
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namespace JobsMedical.Web.Services;
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/// <summary>
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/// One-time-code issuing/verification. Codes live in memory for 5 minutes. In dev the code is
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/// returned to the caller so it can be shown on screen; in production this is where an Iranian
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/// SMS gateway (Kavenegar / SMS.ir) would send the code instead.
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/// </summary>
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public class OtpService
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{
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private readonly IMemoryCache _cache;
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public OtpService(IMemoryCache cache) => _cache = cache;
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private static string Key(string phone) => $"otp:{Normalize(phone)}";
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/// <summary>Generate, store, and (in dev) return a 5-digit code for the phone.</summary>
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public string Issue(string phone)
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{
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var code = Random.Shared.Next(10000, 100000).ToString();
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_cache.Set(Key(phone), code, TimeSpan.FromMinutes(5));
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// TODO(prod): send `code` via Kavenegar/SMS.ir instead of returning it.
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return code;
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}
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public bool Verify(string phone, string code)
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{
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if (_cache.TryGetValue(Key(phone), out string? stored) && stored == code?.Trim())
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{
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_cache.Remove(Key(phone));
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return true;
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}
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return false;
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}
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/// <summary>Normalize Iranian mobile numbers (Persian digits → Latin, strip spaces).</summary>
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public static string Normalize(string phone)
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{
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var chars = phone.Trim().ToCharArray();
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for (var i = 0; i < chars.Length; i++)
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if (chars[i] >= '۰' && chars[i] <= '۹') chars[i] = (char)('0' + (chars[i] - '۰'));
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return new string(chars).Replace(" ", "").Replace("-", "");
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}
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}
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