GitHub Actions Runner

src/Sdk/BuildWebApi/Api/Contracts/Demand.cs

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+using System;
+using System.Text.RegularExpressions;
+using GitHub.Services.Common;
+using GitHub.Services.WebApi;
+using Newtonsoft.Json;
+
+namespace GitHub.Build.WebApi
+{
+    /// <summary>
+    /// Represents a demand used by a definition or build.
+    /// </summary>
+    [JsonConverter(typeof(DemandJsonConverter))]
+    public abstract class Demand : BaseSecuredObject
+    {
+        protected Demand(
+            String name,
+            String value)
+            : this(name, value, null)
+        {
+        }
+
+        protected Demand(
+            String name,
+            String value,
+            ISecuredObject securedObject)
+            : base(securedObject)
+        {
+            ArgumentUtility.CheckStringForNullOrEmpty(name, "name");
+            this.Name = name;
+            this.Value = value;
+        }
+
+        /// <summary>
+        /// The name of the capability referenced by the demand.
+        /// </summary>
+        public String Name
+        {
+            get;
+            private set;
+        }
+
+        /// <summary>
+        /// The demanded value.
+        /// </summary>
+        public String Value
+        {
+            get;
+            private set;
+        }
+
+        public override sealed Boolean Equals(Object obj)
+        {
+            Demand demand = obj as Demand;
+            return demand != null && demand.ToString().Equals(this.ToString(), StringComparison.OrdinalIgnoreCase);
+        }
+
+        public override sealed Int32 GetHashCode()
+        {
+            return this.ToString().ToUpperInvariant().GetHashCode();
+        }
+
+        public override sealed String ToString()
+        {
+            return GetExpression();
+        }
+
+        /// <summary>
+        /// Clones this object.
+        /// </summary>
+        /// <returns></returns>
+        public abstract Demand Clone();
+
+        protected abstract String GetExpression();
+
+        /// <summary>
+        /// Parses a string into a Demand instance.
+        /// </summary>
+        /// <param name="input"></param>
+        /// <param name="demand"></param>
+        /// <returns></returns>
+        public static Boolean TryParse(
+            String input,
+            out Demand demand)
+        {
+            demand = null;
+
+            Match match = s_demandRegex.Match(input);
+            if (!match.Success)
+            {
+                return false;
+            }
+
+            String name = match.Groups["name"].Value;
+            String opcode = match.Groups["opcode"].Value;
+            String value = match.Groups["value"].Value;
+
+            if (String.IsNullOrEmpty(opcode))
+            {
+                demand = new DemandExists(name);
+            }
+            else
+            {
+                switch (opcode)
+                {
+                    case "equals":
+                        demand = new DemandEquals(name, value);
+                        break;
+                }
+            }
+
+            return demand != null;
+        }
+
+        private static readonly Regex s_demandRegex = new Regex(@"^(?<name>[^ ]+)([ ]+\-(?<opcode>[^ ]+)[ ]+(?<value>.*))?$",
+            RegexOptions.Compiled);
+    }
+}