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using System.Linq;
namespace StardewModdingAPI.Framework.ModData
{
/// <summary>A versioned mod metadata field.</summary>
internal class ModDataField
{
/*********
** Accessors
*********/
/// <summary>The field key.</summary>
public ModDataFieldKey Key { get; }
/// <summary>The field value.</summary>
public string Value { get; }
/// <summary>Whether this field should only be applied if it's not already set.</summary>
public bool IsDefault { get; }
/// <summary>The lowest version in the range, or <c>null</c> for all past versions.</summary>
public ISemanticVersion LowerVersion { get; }
/// <summary>The highest version in the range, or <c>null</c> for all future versions.</summary>
public ISemanticVersion UpperVersion { get; }
/*********
** Public methods
*********/
/// <summary>Construct an instance.</summary>
/// <param name="key">The field key.</param>
/// <param name="value">The field value.</param>
/// <param name="isDefault">Whether this field should only be applied if it's not already set.</param>
/// <param name="lowerVersion">The lowest version in the range, or <c>null</c> for all past versions.</param>
/// <param name="upperVersion">The highest version in the range, or <c>null</c> for all future versions.</param>
public ModDataField(ModDataFieldKey key, string value, bool isDefault, ISemanticVersion lowerVersion, ISemanticVersion upperVersion)
{
this.Key = key;
this.Value = value;
this.IsDefault = isDefault;
this.LowerVersion = lowerVersion;
this.UpperVersion = upperVersion;
}
/// <summary>Get whether this data field applies for the given manifest.</summary>
/// <param name="manifest">The mod manifest.</param>
public bool IsMatch(IManifest manifest)
{
return
manifest?.Version != null // ignore invalid manifest
&& (!this.IsDefault || !this.HasFieldValue(manifest, this.Key))
&& (this.LowerVersion == null || !manifest.Version.IsOlderThan(this.LowerVersion))
&& (this.UpperVersion == null || !manifest.Version.IsNewerThan(this.UpperVersion));
}
/*********
** Private methods
*********/
/// <summary>Get whether a manifest field has a meaningful value for the purposes of enforcing <see cref="IsDefault"/>.</summary>
/// <param name="manifest">The mod manifest.</param>
/// <param name="key">The field key matching <see cref="ModDataFieldKey"/>.</param>
private bool HasFieldValue(IManifest manifest, ModDataFieldKey key)
{
switch (key)
{
// update key
case ModDataFieldKey.UpdateKey:
return manifest.UpdateKeys != null && manifest.UpdateKeys.Any();
// non-manifest fields
case ModDataFieldKey.AlternativeUrl:
case ModDataFieldKey.StatusReasonPhrase:
case ModDataFieldKey.Status:
return false;
default:
return false;
}
}
}
}
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