refactor(lsp): clean up tsc requests (#20743)

3 files changed, 23 insertions, 512 deletions

diff --git a/cli/tsc/99_main_compiler.js b/cli/tsc/99_main_compiler.js
index 8978bf1be..e246d5d0c 100644
--- a/cli/tsc/99_main_compiler.js
+++ b/cli/tsc/99_main_compiler.js
@@ -968,26 +968,23 @@ delete Object.prototype.__proto__;
     ops.op_respond({ id, data });
   }
 
-  /**
-   * @param {LanguageServerRequest} request
-   */
-  function serverRequest({ id, ...request }) {
+  function serverRequest(id, method, args) {
     if (logDebug) {
-      debug(`serverRequest()`, { id, ...request });
+      debug(`serverRequest()`, id, method, args);
     }
 
     // reset all memoized source files names
     scriptFileNamesCache = undefined;
     // evict all memoized source file versions
     scriptVersionCache.clear();
-    switch (request.method) {
-      case "restart": {
+    switch (method) {
+      case "$restart": {
         serverRestart();
         return respond(id, true);
       }
-      case "configure": {
+      case "$configure": {
         const { options, errors } = ts
-          .convertCompilerOptionsFromJson(request.compilerOptions, "");
+          .convertCompilerOptionsFromJson(args[0], "");
         Object.assign(options, {
           allowNonTsExtensions: true,
           allowImportingTsExtensions: true,
@@ -998,141 +995,20 @@ delete Object.prototype.__proto__;
         compilationSettings = options;
         return respond(id, true);
       }
-      case "findRenameLocations": {
+      case "$getSupportedCodeFixes": {
         return respond(
           id,
-          languageService.findRenameLocations(
-            request.specifier,
-            request.position,
-            request.findInStrings,
-            request.findInComments,
-            request.providePrefixAndSuffixTextForRename,
-          ),
+          ts.getSupportedCodeFixes(),
         );
       }
-      case "getAssets": {
+      case "$getAssets": {
         return respond(id, getAssets());
       }
-      case "getApplicableRefactors": {
-        return respond(
-          id,
-          languageService.getApplicableRefactors(
-            request.specifier,
-            request.range,
-            {
-              ...(request.preferences ?? {}),
-              allowTextChangesInNewFiles: true,
-              provideRefactorNotApplicableReason: true,
-            },
-            undefined,
-            request.kind,
-          ),
-        );
-      }
-      case "getEditsForRefactor": {
-        return respond(
-          id,
-          languageService.getEditsForRefactor(
-            request.specifier,
-            {
-              ...request.formatCodeSettings,
-              indentStyle: ts.IndentStyle.Smart,
-              insertSpaceBeforeAndAfterBinaryOperators: true,
-              insertSpaceAfterCommaDelimiter: true,
-            },
-            request.range,
-            request.refactorName,
-            request.actionName,
-            request.preferences,
-          ),
-        );
-      }
-      case "getEditsForFileRename": {
-        return respond(
-          id,
-          languageService.getEditsForFileRename(
-            request.oldSpecifier,
-            request.newSpecifier,
-            request.formatCodeSettings,
-            request.preferences,
-          ),
-        );
-      }
-      case "getCodeFixes": {
-        return respond(
-          id,
-          languageService.getCodeFixesAtPosition(
-            request.specifier,
-            request.startPosition,
-            request.endPosition,
-            request.errorCodes.map((v) => Number(v)),
-            {
-              ...request.formatCodeSettings,
-              indentStyle: ts.IndentStyle.Block,
-            },
-            request.preferences,
-          ),
-        );
-      }
-      case "getCombinedCodeFix": {
-        return respond(
-          id,
-          languageService.getCombinedCodeFix(
-            {
-              type: "file",
-              fileName: request.specifier,
-            },
-            request.fixId,
-            {
-              ...request.formatCodeSettings,
-              indentStyle: ts.IndentStyle.Block,
-            },
-            request.preferences,
-          ),
-        );
-      }
-      case "getCompletionDetails": {
-        if (logDebug) {
-          debug("request", request);
-        }
-        return respond(
-          id,
-          languageService.getCompletionEntryDetails(
-            request.args.specifier,
-            request.args.position,
-            request.args.name,
-            request.args.formatCodeSettings ?? {},
-            request.args.source,
-            request.args.preferences,
-            request.args.data,
-          ),
-        );
-      }
-      case "getCompletions": {
-        return respond(
-          id,
-          languageService.getCompletionsAtPosition(
-            request.specifier,
-            request.position,
-            request.preferences,
-            request.formatCodeSettings,
-          ),
-        );
-      }
-      case "getDefinition": {
-        return respond(
-          id,
-          languageService.getDefinitionAndBoundSpan(
-            request.specifier,
-            request.position,
-          ),
-        );
-      }
-      case "getDiagnostics": {
+      case "$getDiagnostics": {
         try {
           /** @type {Record<string, any[]>} */
           const diagnosticMap = {};
-          for (const specifier of request.specifiers) {
+          for (const specifier of args[0]) {
             diagnosticMap[specifier] = fromTypeScriptDiagnostics([
               ...languageService.getSemanticDiagnostics(specifier),
               ...languageService.getSuggestionDiagnostics(specifier),
@@ -1154,151 +1030,18 @@ delete Object.prototype.__proto__;
           return respond(id, {});
         }
       }
-      case "getDocumentHighlights": {
-        return respond(
-          id,
-          languageService.getDocumentHighlights(
-            request.specifier,
-            request.position,
-            request.filesToSearch,
-          ),
-        );
-      }
-      case "getEncodedSemanticClassifications": {
-        return respond(
-          id,
-          languageService.getEncodedSemanticClassifications(
-            request.specifier,
-            request.span,
-            ts.SemanticClassificationFormat.TwentyTwenty,
-          ),
-        );
-      }
-      case "getImplementation": {
-        return respond(
-          id,
-          languageService.getImplementationAtPosition(
-            request.specifier,
-            request.position,
-          ),
-        );
-      }
-      case "getNavigateToItems": {
-        return respond(
-          id,
-          languageService.getNavigateToItems(
-            request.search,
-            request.maxResultCount,
-            request.fileName,
-          ),
-        );
-      }
-      case "getNavigationTree": {
-        return respond(
-          id,
-          languageService.getNavigationTree(request.specifier),
-        );
-      }
-      case "getOutliningSpans": {
-        return respond(
-          id,
-          languageService.getOutliningSpans(
-            request.specifier,
-          ),
-        );
-      }
-      case "getQuickInfo": {
-        return respond(
-          id,
-          languageService.getQuickInfoAtPosition(
-            request.specifier,
-            request.position,
-          ),
-        );
-      }
-      case "findReferences": {
-        return respond(
-          id,
-          languageService.findReferences(
-            request.specifier,
-            request.position,
-          ),
-        );
-      }
-      case "getSignatureHelpItems": {
-        return respond(
-          id,
-          languageService.getSignatureHelpItems(
-            request.specifier,
-            request.position,
-            request.options,
-          ),
-        );
-      }
-      case "getSmartSelectionRange": {
-        return respond(
-          id,
-          languageService.getSmartSelectionRange(
-            request.specifier,
-            request.position,
-          ),
-        );
-      }
-      case "getSupportedCodeFixes": {
-        return respond(
-          id,
-          ts.getSupportedCodeFixes(),
-        );
-      }
-      case "getTypeDefinition": {
-        return respond(
-          id,
-          languageService.getTypeDefinitionAtPosition(
-            request.specifier,
-            request.position,
-          ),
-        );
-      }
-      case "prepareCallHierarchy": {
-        return respond(
-          id,
-          languageService.prepareCallHierarchy(
-            request.specifier,
-            request.position,
-          ),
-        );
-      }
-      case "provideCallHierarchyIncomingCalls": {
-        return respond(
-          id,
-          languageService.provideCallHierarchyIncomingCalls(
-            request.specifier,
-            request.position,
-          ),
-        );
-      }
-      case "provideCallHierarchyOutgoingCalls": {
-        return respond(
-          id,
-          languageService.provideCallHierarchyOutgoingCalls(
-            request.specifier,
-            request.position,
-          ),
-        );
-      }
-      case "provideInlayHints":
-        return respond(
-          id,
-          languageService.provideInlayHints(
-            request.specifier,
-            request.span,
-            request.preferences,
-          ),
-        );
       default:
+        if (typeof languageService[method] === "function") {
+          // The `getCompletionEntryDetails()` method returns null if the
+          // `source` is `null` for whatever reason. It must be `undefined`.
+          if (method == "getCompletionEntryDetails") {
+            args[4] ??= undefined;
+          }
+          return respond(id, languageService[method](...args));
+        }
         throw new TypeError(
           // @ts-ignore exhausted case statement sets type to never
-          `Invalid request method for request: "${request.method}" (${id})`,
+          `Invalid request method for request: "${method}" (${id})`,
         );
     }
   }
diff --git a/cli/tsc/compiler.d.ts b/cli/tsc/compiler.d.ts
index 30e433405..73298a44b 100644
--- a/cli/tsc/compiler.d.ts
+++ b/cli/tsc/compiler.d.ts
@@ -56,239 +56,4 @@ declare global {
       ...args: any[]
     ): void;
   }
-
-  type LanguageServerRequest =
-    | Restart
-    | ConfigureRequest
-    | FindRenameLocationsRequest
-    | GetAssets
-    | GetApplicableRefactors
-    | GetEditsForRefactor
-    | GetEditsForFileRename
-    | GetCodeFixes
-    | GetCombinedCodeFix
-    | GetCompletionDetails
-    | GetCompletionsRequest
-    | GetDefinitionRequest
-    | GetDiagnosticsRequest
-    | GetDocumentHighlightsRequest
-    | GetEncodedSemanticClassifications
-    | GetImplementationRequest
-    | GetNavigateToItems
-    | GetNavigationTree
-    | GetOutliningSpans
-    | GetQuickInfoRequest
-    | FindReferencesRequest
-    | GetSignatureHelpItemsRequest
-    | GetSmartSelectionRange
-    | GetSupportedCodeFixes
-    | GetTypeDefinitionRequest
-    | PrepareCallHierarchy
-    | ProvideCallHierarchyIncomingCalls
-    | ProvideCallHierarchyOutgoingCalls
-    | ProvideInlayHints;
-
-  interface BaseLanguageServerRequest {
-    id: number;
-    method: string;
-  }
-
-  interface ConfigureRequest extends BaseLanguageServerRequest {
-    method: "configure";
-    // deno-lint-ignore no-explicit-any
-    compilerOptions: Record<string, any>;
-  }
-
-  interface FindRenameLocationsRequest extends BaseLanguageServerRequest {
-    method: "findRenameLocations";
-    specifier: string;
-    position: number;
-    findInStrings: boolean;
-    findInComments: boolean;
-    providePrefixAndSuffixTextForRename: boolean;
-  }
-
-  interface GetAssets extends BaseLanguageServerRequest {
-    method: "getAssets";
-  }
-
-  interface GetApplicableRefactors extends BaseLanguageServerRequest {
-    method: "getApplicableRefactors";
-    specifier: string;
-    range: ts.TextRange;
-    preferences?: ts.UserPreferences;
-    kind: string;
-  }
-
-  interface GetEditsForRefactor extends BaseLanguageServerRequest {
-    method: "getEditsForRefactor";
-    specifier: string;
-    formatCodeSettings: ts.FormatCodeSettings;
-    range: ts.TextRange;
-    refactorName: string;
-    actionName: string;
-    preferences?: ts.UserPreferences;
-  }
-
-  interface GetEditsForFileRename extends BaseLanguageServerRequest {
-    method: "getEditsForFileRename";
-    oldSpecifier: string;
-    newSpecifier: string;
-    formatCodeSettings: ts.FormatCodeSettings;
-    preferences?: ts.UserPreferences;
-  }
-
-  interface GetCodeFixes extends BaseLanguageServerRequest {
-    method: "getCodeFixes";
-    specifier: string;
-    startPosition: number;
-    endPosition: number;
-    errorCodes: string[];
-    formatCodeSettings: ts.FormatCodeSettings;
-    preferences: ts.UserPreferences;
-  }
-
-  interface GetCombinedCodeFix extends BaseLanguageServerRequest {
-    method: "getCombinedCodeFix";
-    specifier: string;
-    // deno-lint-ignore ban-types
-    fixId: {};
-    formatCodeSettings: ts.FormatCodeSettings;
-    preferences: ts.UserPreferences;
-  }
-
-  interface GetCompletionDetails extends BaseLanguageServerRequest {
-    method: "getCompletionDetails";
-    args: {
-      specifier: string;
-      position: number;
-      name: string;
-      formatCodeSettings: ts.FormatCodeSettings;
-      source?: string;
-      preferences?: ts.UserPreferences;
-      data?: ts.CompletionEntryData;
-    };
-  }
-
-  interface GetCompletionsRequest extends BaseLanguageServerRequest {
-    method: "getCompletions";
-    specifier: string;
-    position: number;
-    preferences: ts.GetCompletionsAtPositionOptions;
-    formatCodeSettings: ts.FormatCodeSettings;
-  }
-
-  interface GetDiagnosticsRequest extends BaseLanguageServerRequest {
-    method: "getDiagnostics";
-    specifiers: string[];
-  }
-
-  interface GetDefinitionRequest extends BaseLanguageServerRequest {
-    method: "getDefinition";
-    specifier: string;
-    position: number;
-  }
-
-  interface GetDocumentHighlightsRequest extends BaseLanguageServerRequest {
-    method: "getDocumentHighlights";
-    specifier: string;
-    position: number;
-    filesToSearch: string[];
-  }
-
-  interface GetEncodedSemanticClassifications
-    extends BaseLanguageServerRequest {
-    method: "getEncodedSemanticClassifications";
-    specifier: string;
-    span: ts.TextSpan;
-  }
-
-  interface GetImplementationRequest extends BaseLanguageServerRequest {
-    method: "getImplementation";
-    specifier: string;
-    position: number;
-  }
-
-  interface GetNavigateToItems extends BaseLanguageServerRequest {
-    method: "getNavigateToItems";
-    search: string;
-    maxResultCount?: number;
-    fileName?: string;
-  }
-
-  interface GetNavigationTree extends BaseLanguageServerRequest {
-    method: "getNavigationTree";
-    specifier: string;
-  }
-
-  interface GetOutliningSpans extends BaseLanguageServerRequest {
-    method: "getOutliningSpans";
-    specifier: string;
-  }
-
-  interface GetQuickInfoRequest extends BaseLanguageServerRequest {
-    method: "getQuickInfo";
-    specifier: string;
-    position: number;
-  }
-
-  interface FindReferencesRequest extends BaseLanguageServerRequest {
-    method: "findReferences";
-    specifier: string;
-    position: number;
-  }
-
-  interface GetSignatureHelpItemsRequest extends BaseLanguageServerRequest {
-    method: "getSignatureHelpItems";
-    specifier: string;
-    position: number;
-    options: ts.SignatureHelpItemsOptions;
-  }
-
-  interface GetSmartSelectionRange extends BaseLanguageServerRequest {
-    method: "getSmartSelectionRange";
-    specifier: string;
-    position: number;
-  }
-
-  interface GetSupportedCodeFixes extends BaseLanguageServerRequest {
-    method: "getSupportedCodeFixes";
-  }
-
-  interface GetTypeDefinitionRequest extends BaseLanguageServerRequest {
-    method: "getTypeDefinition";
-    specifier: string;
-    position: number;
-  }
-
-  interface PrepareCallHierarchy extends BaseLanguageServerRequest {
-    method: "prepareCallHierarchy";
-    specifier: string;
-    position: number;
-  }
-
-  interface ProvideCallHierarchyIncomingCalls
-    extends BaseLanguageServerRequest {
-    method: "provideCallHierarchyIncomingCalls";
-    specifier: string;
-    position: number;
-  }
-
-  interface ProvideCallHierarchyOutgoingCalls
-    extends BaseLanguageServerRequest {
-    method: "provideCallHierarchyOutgoingCalls";
-    specifier: string;
-    position: number;
-  }
-
-  interface ProvideInlayHints extends BaseLanguageServerRequest {
-    method: "provideInlayHints";
-    specifier: string;
-    span: ts.TextSpan;
-    preferences?: ts.UserPreferences;
-  }
-
-  interface Restart extends BaseLanguageServerRequest {
-    method: "restart";
-  }
 }
diff --git a/cli/tsc/diagnostics.rs b/cli/tsc/diagnostics.rs
index 08fa3e8da..296337974 100644
--- a/cli/tsc/diagnostics.rs
+++ b/cli/tsc/diagnostics.rs
@@ -113,10 +113,13 @@ pub struct Diagnostic {
   pub start: Option<Position>,
   pub end: Option<Position>,
   pub message_text: Option<String>,
+  #[serde(skip_serializing_if = "Option::is_none")]
   pub message_chain: Option<DiagnosticMessageChain>,
+  #[serde(skip_serializing_if = "Option::is_none")]
   pub source: Option<String>,
   pub source_line: Option<String>,
   pub file_name: Option<String>,
+  #[serde(skip_serializing_if = "Option::is_none")]
   pub related_information: Option<Vec<Diagnostic>>,
 }