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setting_re2
设置架构革新中
This commit is contained in:
lincube
423
LanMountainDesktop/Services/Settings/SettingsService.cs
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423
LanMountainDesktop/Services/Settings/SettingsService.cs
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@@ -0,0 +1,423 @@
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Text.Json;
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using LanMountainDesktop.Models;
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using LanMountainDesktop.PluginSdk;
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namespace LanMountainDesktop.Services.Settings;
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internal sealed class SettingsService : ISettingsService
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{
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private static readonly JsonSerializerOptions SerializerOptions = new()
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{
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PropertyNameCaseInsensitive = true,
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PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
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WriteIndented = true
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};
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private readonly AppSettingsService _appSettingsService = new();
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private readonly LauncherSettingsService _launcherSettingsService = new();
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private readonly ComponentSettingsService _componentSettingsService = new();
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private readonly string _pluginSettingsPath;
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private readonly object _pluginSettingsGate = new();
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public SettingsService()
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{
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var root = Path.Combine(
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Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData),
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"LanMountainDesktop");
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_pluginSettingsPath = Path.Combine(root, "plugin-settings.json");
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}
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public event EventHandler<SettingsChangedEvent>? Changed;
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public T LoadSnapshot<T>(SettingsScope scope, string? subjectId = null, string? placementId = null) where T : new()
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{
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return scope switch
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{
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SettingsScope.App => ConvertSnapshot<AppSettingsSnapshot, T>(_appSettingsService.Load()),
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SettingsScope.Launcher => ConvertSnapshot<LauncherSettingsSnapshot, T>(_launcherSettingsService.Load()),
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SettingsScope.ComponentInstance => LoadComponentSnapshot<T>(subjectId, placementId),
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SettingsScope.Plugin => LoadSection<T>(scope, EnsureKey(subjectId), sectionId: "__snapshot__", placementId),
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_ => new T()
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};
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}
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public void SaveSnapshot<T>(
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SettingsScope scope,
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T snapshot,
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string? subjectId = null,
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string? placementId = null,
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string? sectionId = null,
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IReadOnlyCollection<string>? changedKeys = null)
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{
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switch (scope)
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{
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case SettingsScope.App:
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_appSettingsService.Save(ConvertSnapshot<T, AppSettingsSnapshot>(snapshot));
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break;
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case SettingsScope.Launcher:
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_launcherSettingsService.Save(ConvertSnapshot<T, LauncherSettingsSnapshot>(snapshot));
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break;
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case SettingsScope.ComponentInstance:
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SaveComponentSnapshot(subjectId, placementId, snapshot);
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break;
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case SettingsScope.Plugin:
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SaveSection(scope, EnsureKey(subjectId), "__snapshot__", snapshot, placementId, changedKeys);
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break;
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}
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OnChanged(new SettingsChangedEvent(scope, subjectId, placementId, sectionId, changedKeys));
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}
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public T LoadSection<T>(
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SettingsScope scope,
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string subjectId,
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string sectionId,
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string? placementId = null) where T : new()
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{
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if (scope == SettingsScope.ComponentInstance)
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{
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return _componentSettingsService.LoadPluginSettings<T>(EnsureKey(subjectId), placementId);
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}
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if (scope != SettingsScope.Plugin)
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{
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return new T();
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}
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lock (_pluginSettingsGate)
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{
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var document = LoadPluginDocumentLocked();
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if (!document.Sections.TryGetValue(EnsureKey(subjectId), out var pluginSections) ||
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!pluginSections.TryGetValue(EnsureKey(sectionId), out var payload))
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{
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return new T();
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}
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return JsonSerializer.Deserialize<T>(payload.GetRawText(), SerializerOptions) ?? new T();
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}
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}
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public void SaveSection<T>(
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SettingsScope scope,
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string subjectId,
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string sectionId,
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T section,
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string? placementId = null,
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IReadOnlyCollection<string>? changedKeys = null)
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{
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if (scope == SettingsScope.ComponentInstance)
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{
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_componentSettingsService.SavePluginSettings(EnsureKey(subjectId), placementId, section);
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OnChanged(new SettingsChangedEvent(scope, subjectId, placementId, sectionId, changedKeys));
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return;
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}
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if (scope != SettingsScope.Plugin)
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{
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return;
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}
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lock (_pluginSettingsGate)
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{
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var document = LoadPluginDocumentLocked();
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var pluginId = EnsureKey(subjectId);
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if (!document.Sections.TryGetValue(pluginId, out var pluginSections))
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{
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pluginSections = new Dictionary<string, JsonElement>(StringComparer.OrdinalIgnoreCase);
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document.Sections[pluginId] = pluginSections;
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}
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pluginSections[EnsureKey(sectionId)] = JsonSerializer.SerializeToElement(section, SerializerOptions).Clone();
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PersistPluginDocumentLocked(document);
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}
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OnChanged(new SettingsChangedEvent(scope, subjectId, placementId, sectionId, changedKeys));
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}
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public void DeleteSection(SettingsScope scope, string subjectId, string sectionId, string? placementId = null)
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{
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if (scope == SettingsScope.ComponentInstance)
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{
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_componentSettingsService.DeletePluginSettings(EnsureKey(subjectId), placementId);
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OnChanged(new SettingsChangedEvent(scope, subjectId, placementId, sectionId));
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return;
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}
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if (scope != SettingsScope.Plugin)
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{
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return;
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}
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lock (_pluginSettingsGate)
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{
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var document = LoadPluginDocumentLocked();
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var pluginId = EnsureKey(subjectId);
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if (document.Sections.TryGetValue(pluginId, out var sections) &&
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sections.Remove(EnsureKey(sectionId)))
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{
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if (sections.Count == 0)
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{
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document.Sections.Remove(pluginId);
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}
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PersistPluginDocumentLocked(document);
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}
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}
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OnChanged(new SettingsChangedEvent(scope, subjectId, placementId, sectionId));
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}
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public T? GetValue<T>(
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SettingsScope scope,
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string key,
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string? subjectId = null,
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string? placementId = null,
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string? sectionId = null)
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{
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var snapshot = scope switch
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{
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SettingsScope.App => JsonSerializer.SerializeToElement(_appSettingsService.Load(), SerializerOptions),
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SettingsScope.Launcher => JsonSerializer.SerializeToElement(_launcherSettingsService.Load(), SerializerOptions),
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SettingsScope.ComponentInstance => JsonSerializer.SerializeToElement(
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_componentSettingsService.LoadForComponent(EnsureKey(subjectId), placementId),
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SerializerOptions),
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SettingsScope.Plugin => JsonSerializer.SerializeToElement(
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LoadSection<Dictionary<string, JsonElement>>(SettingsScope.Plugin, EnsureKey(subjectId), sectionId ?? "__root__", placementId),
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SerializerOptions),
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_ => default
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};
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if (snapshot.ValueKind != JsonValueKind.Object)
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{
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return default;
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}
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foreach (var property in snapshot.EnumerateObject())
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{
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if (!string.Equals(property.Name, key, StringComparison.OrdinalIgnoreCase))
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{
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continue;
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}
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try
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{
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return property.Value.Deserialize<T>(SerializerOptions);
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}
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catch
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{
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return default;
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}
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}
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return default;
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}
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public void SetValue<T>(
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SettingsScope scope,
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string key,
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T value,
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string? subjectId = null,
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string? placementId = null,
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string? sectionId = null,
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IReadOnlyCollection<string>? changedKeys = null)
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{
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if (scope == SettingsScope.Plugin)
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{
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var dict = LoadSection<Dictionary<string, JsonElement>>(
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SettingsScope.Plugin,
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EnsureKey(subjectId),
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sectionId ?? "__root__",
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placementId);
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dict[key] = JsonSerializer.SerializeToElement(value, SerializerOptions).Clone();
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SaveSection(SettingsScope.Plugin, EnsureKey(subjectId), sectionId ?? "__root__", dict, placementId, changedKeys ?? [key]);
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return;
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}
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if (scope == SettingsScope.ComponentInstance)
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{
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var dict = _componentSettingsService.LoadPluginSettings<Dictionary<string, JsonElement>>(EnsureKey(subjectId), placementId);
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dict[key] = JsonSerializer.SerializeToElement(value, SerializerOptions).Clone();
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_componentSettingsService.SavePluginSettings(EnsureKey(subjectId), placementId, dict);
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OnChanged(new SettingsChangedEvent(scope, subjectId, placementId, sectionId, changedKeys ?? [key]));
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return;
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}
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if (scope == SettingsScope.App)
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{
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var snapshot = _appSettingsService.Load();
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var updated = UpdateObjectKey(snapshot, key, value);
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_appSettingsService.Save(updated);
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OnChanged(new SettingsChangedEvent(scope, null, null, sectionId, changedKeys ?? [key]));
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return;
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}
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if (scope == SettingsScope.Launcher)
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{
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var snapshot = _launcherSettingsService.Load();
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var updated = UpdateObjectKey(snapshot, key, value);
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_launcherSettingsService.Save(updated);
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OnChanged(new SettingsChangedEvent(scope, null, null, sectionId, changedKeys ?? [key]));
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}
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}
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public IComponentSettingsAccessor GetComponentAccessor(string componentId, string? placementId)
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{
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return new ComponentSettingsAccessor(this, componentId, placementId);
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}
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private T LoadComponentSnapshot<T>(string? componentId, string? placementId) where T : new()
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{
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var snapshot = _componentSettingsService.LoadForComponent(EnsureKey(componentId), placementId);
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return ConvertSnapshot<ComponentSettingsSnapshot, T>(snapshot);
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}
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private void SaveComponentSnapshot<T>(string? componentId, string? placementId, T snapshot)
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{
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var converted = ConvertSnapshot<T, ComponentSettingsSnapshot>(snapshot);
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_componentSettingsService.SaveForComponent(EnsureKey(componentId), placementId, converted);
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}
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private static TOut ConvertSnapshot<TIn, TOut>(TIn source) where TOut : new()
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{
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if (source is null)
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{
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return new TOut();
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}
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if (source is TOut direct)
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{
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return direct;
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}
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try
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{
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var json = JsonSerializer.Serialize(source, SerializerOptions);
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return JsonSerializer.Deserialize<TOut>(json, SerializerOptions) ?? new TOut();
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}
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catch
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{
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return new TOut();
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}
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}
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private static TSnapshot UpdateObjectKey<TSnapshot, TValue>(TSnapshot snapshot, string key, TValue value)
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where TSnapshot : new()
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{
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var bag = JsonSerializer.Deserialize<Dictionary<string, JsonElement>>(
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JsonSerializer.Serialize(snapshot, SerializerOptions),
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SerializerOptions) ?? new Dictionary<string, JsonElement>(StringComparer.OrdinalIgnoreCase);
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var actualKey = bag.Keys.FirstOrDefault(existing => string.Equals(existing, key, StringComparison.OrdinalIgnoreCase)) ?? key;
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bag[actualKey] = JsonSerializer.SerializeToElement(value, SerializerOptions).Clone();
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try
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{
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var json = JsonSerializer.Serialize(bag, SerializerOptions);
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return JsonSerializer.Deserialize<TSnapshot>(json, SerializerOptions) ?? new TSnapshot();
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}
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catch
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{
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return snapshot is null ? new TSnapshot() : snapshot;
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}
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}
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private PluginSettingsDocument LoadPluginDocumentLocked()
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{
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try
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{
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if (!File.Exists(_pluginSettingsPath))
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{
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return new PluginSettingsDocument();
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}
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var json = File.ReadAllText(_pluginSettingsPath);
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return JsonSerializer.Deserialize<PluginSettingsDocument>(json, SerializerOptions) ?? new PluginSettingsDocument();
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}
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catch (Exception ex)
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{
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AppLogger.Warn("SettingsService", $"Failed to load plugin settings '{_pluginSettingsPath}'.", ex);
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return new PluginSettingsDocument();
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}
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}
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private void PersistPluginDocumentLocked(PluginSettingsDocument document)
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{
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try
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{
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var directory = Path.GetDirectoryName(_pluginSettingsPath);
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if (!string.IsNullOrWhiteSpace(directory))
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{
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Directory.CreateDirectory(directory);
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}
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File.WriteAllText(_pluginSettingsPath, JsonSerializer.Serialize(document, SerializerOptions));
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}
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catch (Exception ex)
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{
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AppLogger.Warn("SettingsService", $"Failed to persist plugin settings '{_pluginSettingsPath}'.", ex);
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}
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}
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private static string EnsureKey(string? value)
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{
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return string.IsNullOrWhiteSpace(value) ? "__default__" : value.Trim();
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}
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private void OnChanged(SettingsChangedEvent e)
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{
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try
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{
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Changed?.Invoke(this, e);
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}
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catch
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{
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// Never let a subscriber break settings persistence.
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}
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}
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private sealed class ComponentSettingsAccessor : IComponentSettingsAccessor
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{
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private readonly SettingsService _settingsService;
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public ComponentSettingsAccessor(SettingsService settingsService, string componentId, string? placementId)
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{
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_settingsService = settingsService;
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ComponentId = componentId;
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PlacementId = placementId;
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}
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public string ComponentId { get; }
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public string? PlacementId { get; }
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public T LoadSnapshot<T>() where T : new()
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=> _settingsService.LoadSnapshot<T>(SettingsScope.ComponentInstance, ComponentId, PlacementId);
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public void SaveSnapshot<T>(T snapshot, IReadOnlyCollection<string>? changedKeys = null)
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=> _settingsService.SaveSnapshot(SettingsScope.ComponentInstance, snapshot, ComponentId, PlacementId, changedKeys: changedKeys);
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public T LoadSection<T>(string sectionId) where T : new()
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=> _settingsService.LoadSection<T>(SettingsScope.ComponentInstance, ComponentId, sectionId, PlacementId);
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public void SaveSection<T>(string sectionId, T section, IReadOnlyCollection<string>? changedKeys = null)
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=> _settingsService.SaveSection(SettingsScope.ComponentInstance, ComponentId, sectionId, section, PlacementId, changedKeys);
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public void DeleteSection(string sectionId)
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=> _settingsService.DeleteSection(SettingsScope.ComponentInstance, ComponentId, sectionId, PlacementId);
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public T? GetValue<T>(string key)
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=> _settingsService.GetValue<T>(SettingsScope.ComponentInstance, key, ComponentId, PlacementId);
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public void SetValue<T>(string key, T value, IReadOnlyCollection<string>? changedKeys = null)
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=> _settingsService.SetValue(SettingsScope.ComponentInstance, key, value, ComponentId, PlacementId, changedKeys: changedKeys);
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}
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private sealed class PluginSettingsDocument
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{
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public Dictionary<string, Dictionary<string, JsonElement>> Sections { get; set; } = new(StringComparer.OrdinalIgnoreCase);
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}
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}
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Block a user