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//-----------------------------------------------------------------------
// <copyright file="Trim.cs" company="Outercurve Foundation">
// Copyright (c) Outercurve Foundation. All rights reserved.
// </copyright>
//-----------------------------------------------------------------------
namespace DotNetOpenAuth.BuildTasks {
using Microsoft.Build.Framework;
using Microsoft.Build.Utilities;
/// <summary>
/// Trims item identities or metadata.
/// </summary>
public class Trim : Task {
/// <summary>
/// Gets or sets the name of the metadata to trim. Leave empty or null to operate on itemspec.
/// </summary>
/// <value>The name of the metadata.</value>
public string MetadataName { get; set; }
/// <summary>
/// Gets or sets the characters that should be trimmed off if found at the start of items' ItemSpecs.
/// </summary>
public string StartCharacters { get; set; }
/// <summary>
/// Gets or sets the characters that should be trimmed off if found at the end of items' ItemSpecs.
/// </summary>
public string EndCharacters { get; set; }
/// <summary>
/// Gets or sets the substring that should be trimmed along with everything that appears after it.
/// </summary>
public string AllAfter { get; set; }
/// <summary>
/// Gets or sets the items with ItemSpec's to be trimmed.
/// </summary>
[Required]
public ITaskItem[] Inputs { get; set; }
/// <summary>
/// Gets or sets the items with trimmed ItemSpec strings.
/// </summary>
[Output]
public ITaskItem[] Outputs { get; set; }
/// <summary>
/// Executes this instance.
/// </summary>
/// <returns>A value indicating whether the task completed successfully.</returns>
public override bool Execute() {
this.Outputs = new ITaskItem[this.Inputs.Length];
for (int i = 0; i < this.Inputs.Length; i++) {
this.Outputs[i] = new TaskItem(this.Inputs[i]);
string value = string.IsNullOrEmpty(this.MetadataName) ? this.Outputs[i].ItemSpec : this.Outputs[i].GetMetadata(this.MetadataName);
if (!string.IsNullOrEmpty(this.StartCharacters)) {
value = value.TrimStart(this.StartCharacters.ToCharArray());
}
if (!string.IsNullOrEmpty(this.EndCharacters)) {
value = value.TrimEnd(this.EndCharacters.ToCharArray());
}
if (!string.IsNullOrEmpty(this.AllAfter)) {
int index = value.IndexOf(this.AllAfter);
if (index >= 0) {
value = value.Substring(0, index);
}
}
if (string.IsNullOrEmpty(this.MetadataName)) {
this.Outputs[i].ItemSpec = value;
} else {
this.Outputs[i].SetMetadata(this.MetadataName, value);
}
}
return true;
}
}
}
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