/// <summary>
/// Called by ASP.NET Core when we need to translate view model display labels
/// </summary>
/// <param name="context"></param>
public void CreateDisplayMetadata(DisplayMetadataProviderContext context)
{
var theAttributes = context.Attributes;
var modelMetadata = context.DisplayMetadata;
var propertyName = context.Key.Name;
var containerType = context.Key.ContainerType;
if (containerType == null)
{
return;
}
var currentMetaData = modelMetadata.DisplayName?.Invoke();
if (currentMetaData == null)
{
return;
}
modelMetadata.DisplayName = () => !_configurationContext.ShouldLookupResource(currentMetaData)
? _metadataHelper.GetTranslation(currentMetaData)
: _metadataHelper.GetTranslation(containerType, propertyName);
var displayAttribute = theAttributes.OfType <DisplayAttribute>().FirstOrDefault();
if (displayAttribute?.Description != null)
{
modelMetadata.Description = () =>
_metadataHelper.GetTranslation(containerType, $"{propertyName}-Description");
}
}
public void UseLegacyMode_DisplayNameIsNull_ReturnsFalse()
{
var ctx = new ConfigurationContext
{
EnableLegacyMode = () => true
};
var result = ctx.ShouldLookupResource(null);
Assert.False(result);
}
public void DontUseLegacyMode_DisplayNameIsLegacyModeWithLegacyModeEnabled_ReturnsFalse()
{
var displayName = "/legacy/path";
var ctx = new ConfigurationContext
{
EnableLegacyMode = () => false
};
var result = ctx.ShouldLookupResource(displayName);
Assert.False(result);
}
public void UseLegacyMode_DisplayNameIsNotLegacyModeWithLegacyModeEnabled_ReturnsFalse()
{
var displayName = "propertyName";
var ctx = new ConfigurationContext
{
ResourceLookupFilter = key => true
};
var result = ctx.ShouldLookupResource(displayName);
Assert.True(result);
}
public void UseLegacyMode_EnableLegacyModeIsFalse_ReturnsTrue()
{
var displayName = "propertyName";
var ctx = new ConfigurationContext
{
EnableLegacyMode = () => true
};
var result = ctx.ShouldLookupResource(displayName);
Assert.True(result);
}
public void DontUseLegacyMode_DisplayNameHasNotLegacyFormat_ReturnsTrue()
{
var displayName = "propertyName";
var ctx = new ConfigurationContext
{
EnableLegacyMode = () => false
};
var result = ctx.ShouldLookupResource(displayName);
Assert.True(result);
}
public void UseLegacyMode_DisplayNameIsLegacyModeWithLegacyModeEnabled_ReturnsTrue()
{
var displayName = "/legacy/path";
var ctx = new ConfigurationContext
{
EnableLegacyMode = () => true,
ResourceLookupFilter = key => true
};
var result = ctx.ShouldLookupResource(displayName);
Assert.True(result);
}
internal string GetTranslation(string resourceKey)
{
var result = resourceKey;
if (!_configurationContext.EnableLocalization())
{
return(result);
}
var localizedDisplayName = _localizationProvider.GetString(resourceKey);
result = localizedDisplayName;
// for the legacy purposes - we need to look for this resource translation using display name
// once again - this will make sure that existing XPath resources are still working
if (localizedDisplayName != null && !_configurationContext.ShouldLookupResource(localizedDisplayName))
{
result = _localizationProvider.GetString(localizedDisplayName);
}
// If other data annotations exists except for [Display], an exception is thrown when display name is ""
// It should be null to avoid exception as ModelMetadata.GetDisplayName only checks for null and not String.Empty
return(string.IsNullOrWhiteSpace(localizedDisplayName) ? null : result);
}
