#nullable disable using System.Collections.Generic; using System.Linq; using Mono.Cecil; using Mono.Cecil.Cil; using StardewModdingAPI.Framework.ModLoading.Framework; namespace StardewModdingAPI.Framework.ModLoading.Finders { /// Finds incompatible CIL instructions that reference a given field. internal class FieldFinder : BaseInstructionHandler { /********* ** Fields *********/ /// The full type name for which to find references. private readonly string FullTypeName; /// The field names for which to find references. private readonly ISet FieldNames; /// The result to return for matching instructions. private readonly InstructionHandleResult Result; /********* ** Public methods *********/ /// Construct an instance. /// The full type name for which to find references. /// The field names for which to find references. /// The result to return for matching instructions. public FieldFinder(string fullTypeName, string[] fieldNames, InstructionHandleResult result) : base(defaultPhrase: $"{string.Join(", ", fieldNames.Select(p => $"{fullTypeName}.{p}"))} field{(fieldNames.Length != 1 ? "s" : "")}") // default phrase should never be used { this.FullTypeName = fullTypeName; this.FieldNames = new HashSet(fieldNames); this.Result = result; } /// Construct an instance. /// The full type name for which to find references. /// The field name for which to find references. /// The result to return for matching instructions. public FieldFinder(string fullTypeName, string fieldName, InstructionHandleResult result) : this(fullTypeName, new[] { fieldName }, result) { } /// public override bool Handle(ModuleDefinition module, ILProcessor cil, Instruction instruction) { if (this.FieldNames.Any()) { FieldReference fieldRef = RewriteHelper.AsFieldReference(instruction); if (fieldRef != null && fieldRef.DeclaringType.FullName == this.FullTypeName && this.FieldNames.Contains(fieldRef.Name)) { this.FieldNames.Remove(fieldRef.Name); this.MarkFlag(this.Result); this.Phrases.Add($"{this.FullTypeName}.{fieldRef.Name} field"); } } return false; } } }