1  import type { SettingSource } from './constants.js'
 2  import type { SettingsJson } from './types.js'
 3  import type { SettingsWithErrors, ValidationError } from './validation.js'
 4  
 5  let sessionSettingsCache: SettingsWithErrors | null = null
 6  
 7  export function getSessionSettingsCache(): SettingsWithErrors | null {
 8    return sessionSettingsCache
 9  }
10  
11  export function setSessionSettingsCache(value: SettingsWithErrors): void {
12    sessionSettingsCache = value
13  }
14  
15  /**
16   * Per-source cache for getSettingsForSource. Invalidated alongside the
17   * merged sessionSettingsCache — same resetSettingsCache() triggers
18   * (settings write, --add-dir, plugin init, hooks refresh).
19   */
20  const perSourceCache = new Map<SettingSource, SettingsJson | null>()
21  
22  export function getCachedSettingsForSource(
23    source: SettingSource,
24  ): SettingsJson | null | undefined {
25    // undefined = cache miss; null = cached "no settings for this source"
26    return perSourceCache.has(source) ? perSourceCache.get(source) : undefined
27  }
28  
29  export function setCachedSettingsForSource(
30    source: SettingSource,
31    value: SettingsJson | null,
32  ): void {
33    perSourceCache.set(source, value)
34  }
35  
36  /**
37   * Path-keyed cache for parseSettingsFile. Both getSettingsForSource and
38   * loadSettingsFromDisk call parseSettingsFile on the same paths during
39   * startup — this dedupes the disk read + zod parse.
40   */
41  type ParsedSettings = {
42    settings: SettingsJson | null
43    errors: ValidationError[]
44  }
45  const parseFileCache = new Map<string, ParsedSettings>()
46  
47  export function getCachedParsedFile(path: string): ParsedSettings | undefined {
48    return parseFileCache.get(path)
49  }
50  
51  export function setCachedParsedFile(path: string, value: ParsedSettings): void {
52    parseFileCache.set(path, value)
53  }
54  
55  export function resetSettingsCache(): void {
56    sessionSettingsCache = null
57    perSourceCache.clear()
58    parseFileCache.clear()
59  }
60  
61  /**
62   * Plugin settings base layer for the settings cascade.
63   * pluginLoader writes here after loading plugins;
64   * loadSettingsFromDisk reads it as the lowest-priority base.
65   */
66  let pluginSettingsBase: Record<string, unknown> | undefined
67  
68  export function getPluginSettingsBase(): Record<string, unknown> | undefined {
69    return pluginSettingsBase
70  }
71  
72  export function setPluginSettingsBase(
73    settings: Record<string, unknown> | undefined,
74  ): void {
75    pluginSettingsBase = settings
76  }
77  
78  export function clearPluginSettingsBase(): void {
79    pluginSettingsBase = undefined
80  }