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path: root/src/StardewModdingAPI.Toolkit/Framework/ModData/ModDataRecord.cs
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using System;
using System.Collections.Generic;
using System.Linq;

namespace StardewModdingAPI.Toolkit.Framework.ModData
{
    /// <summary>The parsed mod metadata from SMAPI's internal mod list.</summary>
    public class ModDataRecord
    {
        /*********
        ** Accessors
        *********/
        /// <summary>The mod's default display name.</summary>
        public string DisplayName { get; }

        /// <summary>The mod's current unique ID.</summary>
        public string ID { get; }

        /// <summary>The former mod IDs (if any).</summary>
        public string[] FormerIDs { get; }

        /// <summary>Maps local versions to a semantic version for update checks.</summary>
        public IDictionary<string, string> MapLocalVersions { get; }

        /// <summary>Maps remote versions to a semantic version for update checks.</summary>
        public IDictionary<string, string> MapRemoteVersions { get; }

        /// <summary>The versioned field data.</summary>
        public ModDataField[] Fields { get; }


        /*********
        ** Public methods
        *********/
        /// <summary>Construct an instance.</summary>
        /// <param name="displayName">The mod's default display name.</param>
        /// <param name="model">The raw data model.</param>
        internal ModDataRecord(string displayName, ModDataModel model)
        {
            this.DisplayName = displayName;
            this.ID = model.ID;
            this.FormerIDs = model.GetFormerIDs().ToArray();
            this.MapLocalVersions = new Dictionary<string, string>(model.MapLocalVersions, StringComparer.InvariantCultureIgnoreCase);
            this.MapRemoteVersions = new Dictionary<string, string>(model.MapRemoteVersions, StringComparer.InvariantCultureIgnoreCase);
            this.Fields = model.GetFields().ToArray();
        }

        /// <summary>Get whether the mod has (or previously had) the given ID.</summary>
        /// <param name="id">The mod ID.</param>
        public bool HasID(string id)
        {
            // try main ID
            if (this.ID.Equals(id, StringComparison.InvariantCultureIgnoreCase))
                return true;

            // try former IDs
            foreach (string formerID in this.FormerIDs)
            {
                if (formerID.Equals(id, StringComparison.InvariantCultureIgnoreCase))
                    return true;
            }

            return false;
        }

        /// <summary>Get a semantic local version for update checks.</summary>
        /// <param name="version">The remote version to normalise.</param>
        public ISemanticVersion GetLocalVersionForUpdateChecks(ISemanticVersion version)
        {
            return this.MapLocalVersions != null && this.MapLocalVersions.TryGetValue(version.ToString(), out string newVersion)
                ? new SemanticVersion(newVersion)
                : version;
        }

        /// <summary>Get a semantic remote version for update checks.</summary>
        /// <param name="version">The remote version to normalise.</param>
        public string GetRemoteVersionForUpdateChecks(string version)
        {
            // normalise version if possible
            if (SemanticVersion.TryParse(version, out ISemanticVersion parsed))
                version = parsed.ToString();

            // fetch remote version
            return this.MapRemoteVersions != null && this.MapRemoteVersions.TryGetValue(version, out string newVersion)
                ? newVersion
                : version;
        }

        /// <summary>Get the possible mod IDs.</summary>
        public IEnumerable<string> GetIDs()
        {
            return this.FormerIDs
                .Concat(new[] { this.ID })
                .Where(p => !string.IsNullOrWhiteSpace(p))
                .Select(p => p.Trim())
                .Distinct();
        }

        /// <summary>Get the default update key for this mod, if any.</summary>
        public string GetDefaultUpdateKey()
        {
            string updateKey = this.Fields.FirstOrDefault(p => p.Key == ModDataFieldKey.UpdateKey && p.IsDefault)?.Value;
            return !string.IsNullOrWhiteSpace(updateKey)
                ? updateKey
                : null;
        }

        /// <summary>Get a parsed representation of the <see cref="ModDataRecord.Fields"/> which match a given manifest.</summary>
        /// <param name="manifest">The manifest to match.</param>
        public ModDataRecordVersionedFields GetVersionedFields(IManifest manifest)
        {
            ModDataRecordVersionedFields parsed = new ModDataRecordVersionedFields { DisplayName = this.DisplayName, DataRecord = this };
            foreach (ModDataField field in this.Fields.Where(field => field.IsMatch(manifest)))
            {
                switch (field.Key)
                {
                    // update key
                    case ModDataFieldKey.UpdateKey:
                        parsed.UpdateKey = field.Value;
                        break;

                    // alternative URL
                    case ModDataFieldKey.AlternativeUrl:
                        parsed.AlternativeUrl = field.Value;
                        break;

                    // status
                    case ModDataFieldKey.Status:
                        parsed.Status = (ModStatus)Enum.Parse(typeof(ModStatus), field.Value, ignoreCase: true);
                        parsed.StatusUpperVersion = field.UpperVersion;
                        break;

                    // status reason phrase
                    case ModDataFieldKey.StatusReasonPhrase:
                        parsed.StatusReasonPhrase = field.Value;
                        break;
                }
            }

            return parsed;
        }
    }
}