/**
* Copyright (c) 2026 Ivan Iraci <ivan.iraci@professioneit.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
import type { Diagnostic } from 'vscode-languageserver-protocol';
import type { DiagnosticsCache as IDiagnosticsCache } from '../types.js';
import { logger } from '../utils/logger.js';
/**
* Caches diagnostics received from language servers via publishDiagnostics notifications.
*
* Diagnostics in LSP are push-based - servers send them proactively when files change.
* This cache stores them so tools can retrieve them on demand.
*/
export class DiagnosticsCacheImpl implements IDiagnosticsCache {
private cache = new Map<string, Diagnostic[]>();
/**
* Update cached diagnostics for a URI.
* Called when publishDiagnostics notification is received.
*/
update(uri: string, diagnostics: Diagnostic[]): void {
this.cache.set(uri, diagnostics);
logger.debug(`Updated diagnostics cache: ${uri}`, {
count: diagnostics.length,
errors: diagnostics.filter(d => d.severity === 1).length,
warnings: diagnostics.filter(d => d.severity === 2).length,
});
}
/**
* Get cached diagnostics for a URI.
*/
get(uri: string): Diagnostic[] {
return this.cache.get(uri) ?? [];
}
/**
* Clear diagnostics for a URI.
* Called when document is closed.
*/
clear(uri: string): void {
this.cache.delete(uri);
logger.debug(`Cleared diagnostics cache: ${uri}`);
}
/**
* Clear all cached diagnostics.
* Called when server restarts.
*/
clearAll(): void {
this.cache.clear();
logger.debug('Cleared all diagnostics cache');
}
/**
* Get all URIs with cached diagnostics.
*/
getUris(): string[] {
return [...this.cache.keys()];
}
/**
* Get total count of diagnostics across all files.
*/
getTotalCount(): number {
let total = 0;
for (const diagnostics of this.cache.values()) {
total += diagnostics.length;
}
return total;
}
/**
* Get summary of diagnostics across all files.
*/
getSummary(): { errors: number; warnings: number; info: number; hints: number } {
let errors = 0;
let warnings = 0;
let info = 0;
let hints = 0;
for (const diagnostics of this.cache.values()) {
for (const d of diagnostics) {
switch (d.severity) {
case 1: errors++; break;
case 2: warnings++; break;
case 3: info++; break;
case 4: hints++; break;
}
}
}
return { errors, warnings, info, hints };
}
}
/**
* Create a diagnostics cache instance.
*/
export function createDiagnosticsCache(): IDiagnosticsCache {
return new DiagnosticsCacheImpl();
}
