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Add DateTime to/from conversion for all known formats to fix parsing and CSV export

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This commit is contained in:
Leendert de Borst
2025-09-14 19:56:40 +02:00
parent 5e2f950b7e
commit b7cbecc61d
1 changed files with 60 additions and 10 deletions
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70
apps/server/Databases/AliasClientDb/AliasClientDbContext.cs
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@@ -111,16 +111,8 @@ public class AliasClientDbContext : DbContext
// TODO: when the birthdate field is made optional in data model and all existing values have been converted from "yyyy-MM-dd HH.mm.ss" to "yyyy-MM-dd HH':'mm':'ss", this can probably
// be removed. But test the usecase where the birthdate field is empty string (because of browser extension error).
var emptyDateTimeConverter = new ValueConverter<DateTime, string>(
v => v == DateTime.MinValue
? string.Empty
: v.ToString("yyyy-MM-dd HH':'mm':'ss", CultureInfo.InvariantCulture),
v => string.IsNullOrEmpty(v)
? DateTime.MinValue
: DateTime.ParseExact(
v,
new[] { "yyyy-MM-dd HH':'mm':'ss", "yyyy-MM-dd HH.mm.ss" }, // Support reading . and : as separators.
CultureInfo.InvariantCulture,
DateTimeStyles.None));
v => DateTimeToString(v),
v => StringToDateTime(v));
modelBuilder.Entity<Alias>()
.Property(e => e.BirthDate)
@@ -187,6 +179,12 @@ public class AliasClientDbContext : DbContext
base.OnConfiguring(optionsBuilder);
}
/// <summary>
/// Gets the options for the AliasClientDbContext.
/// </summary>
/// <param name="connection">The SQLite connection to use to connect to the SQLite database.</param>
/// <param name="logAction">The action to perform for logging.</param>
/// <returns>The options for the AliasClientDbContext.</returns>
private static DbContextOptions<AliasClientDbContext> GetOptions(SqliteConnection connection, Action<string> logAction)
{
var optionsBuilder = new DbContextOptionsBuilder<AliasClientDbContext>();
@@ -195,4 +193,56 @@ public class AliasClientDbContext : DbContext
return optionsBuilder.Options;
}
/// <summary>
/// Converts a DateTime to a string.
/// </summary>
/// <param name="v">The DateTime to convert.</param>
/// <returns>The string representation of the DateTime.</returns>
private static string DateTimeToString(DateTime v)
{
return v == DateTime.MinValue ? string.Empty : v.ToString("yyyy-MM-dd HH':'mm':'ss", CultureInfo.InvariantCulture);
}
/// <summary>
/// Converts a string to a DateTime.
/// </summary>
/// <param name="v">The string to convert.</param>
/// <returns>The DateTime representation of the string.</returns>
private static DateTime StringToDateTime(string v)
{
if (string.IsNullOrEmpty(v))
{
return DateTime.MinValue;
}
// Try to parse with all known formats first
string[] formats = new[]
{
"yyyy-MM-dd HH':'mm':'ss",
"yyyy-MM-dd HH.mm.ss",
"yyyy-MM-dd'T'HH:mm:ss.fff'Z'", // ISO 8601 with milliseconds and Zulu
"yyyy-MM-dd'T'HH:mm:ss'Z'", // ISO 8601 with Zulu
"yyyy-MM-dd'T'HH:mm:ss.fff", // ISO 8601 with milliseconds
"yyyy-MM-dd'T'HH:mm:ss", // ISO 8601 basic
"yyyy-MM-dd", // Date only,
};
foreach (var format in formats)
{
if (DateTime.TryParseExact(v, format, CultureInfo.InvariantCulture, DateTimeStyles.AssumeUniversal | DateTimeStyles.AdjustToUniversal, out var dt))
{
return dt;
}
}
// Fallback: try to parse dynamically (handles most .NET and JS date strings)
if (DateTime.TryParse(v, CultureInfo.InvariantCulture, DateTimeStyles.AssumeUniversal | DateTimeStyles.AdjustToUniversal, out var dynamicDt))
{
return dynamicDt;
}
// If all parsing fails, return MinValue as a safe fallback
return DateTime.MinValue;
}
}