87 lines
2.7 KiB
C#
87 lines
2.7 KiB
C#
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using System;
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using System.Security.Cryptography;
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using System.Text;
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using UnityEngine;
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namespace Watermelon
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{
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public static class User
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{
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private const string LocalIdKey = "user_local_id_v1";
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private static string localId;
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private static string customId;
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/// <summary>Stable local ID (generated once and stored in PlayerPrefs).</summary>
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public static string LocalId => localId ??= LoadOrCreateLocalId();
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/// <summary>Custom ID (e.g., Firebase UID). Not persisted unless you save it manually.</summary>
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public static string CustomId => customId;
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/// <summary>Whether a custom ID is set.</summary>
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public static bool HasCustomId => !string.IsNullOrWhiteSpace(customId);
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/// <summary>Main ID for the system: uses CustomId if present, otherwise LocalId.</summary>
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public static string GetId() => HasCustomId ? customId : LocalId;
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public static void SetCustomId(string customId)
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{
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User.customId = Sanitize(customId);
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}
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/// <summary>SHA-256 hash in hex (64 characters) of GetId(). Useful for Google ObfuscatedAccountId.</summary>
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public static string GetIdSha256Hex() => Sha256Hex(GetId());
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/// <summary>
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/// Guid created from the first 16 bytes of SHA-256 hash of GetId(). Useful for Apple AppAccountToken.
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/// </summary>
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public static Guid GetIdAsGuidFromSha256()
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{
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using (SHA256 sha = SHA256.Create())
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{
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byte[] hash = sha.ComputeHash(Encoding.UTF8.GetBytes(GetId() ?? ""));
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byte[] guidBytes = new byte[16];
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Buffer.BlockCopy(hash, 0, guidBytes, 0, 16);
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return new Guid(guidBytes);
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}
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}
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private static string LoadOrCreateLocalId()
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{
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string id = PlayerPrefs.GetString(LocalIdKey, null);
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if (string.IsNullOrEmpty(id))
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{
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id = Guid.NewGuid().ToString("N");
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PlayerPrefs.SetString(LocalIdKey, id);
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PlayerPrefs.Save();
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}
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return id;
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}
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private static string Sanitize(string s)
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{
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s = s?.Trim();
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return string.IsNullOrEmpty(s) ? null : s;
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}
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private static string Sha256Hex(string s)
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{
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using (SHA256 sha = SHA256.Create())
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{
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byte[] bytes = Encoding.UTF8.GetBytes(s ?? "");
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byte[] hash = sha.ComputeHash(bytes);
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StringBuilder sb = new StringBuilder(hash.Length * 2);
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foreach (byte b in hash) sb.Append(b.ToString("x2"));
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return sb.ToString();
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}
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}
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}
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}
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