Port the rest of the server layer away from multi-file approach

lib/server/src/diagnostics.ts

@@ -15,30 +15,26 @@ export async function runDiagnostics(uri: string, textDoc: TextDocument) {
 
 function handleDiagnostics(uri: string, textDoc: TextDocument) {
     const fileName = url.fileURLToPath(uri);
-    const languageService = getLanguageService(fileName, textDoc.getText());
     const usableData = textDocumentToUsableData(textDoc);
     const queryData = generateLanguageServiceQueryDataForDiagnostics(usableData, textDoc.uri);
 
+    if (!queryData.isValid) {
+        return;
+    }
+
+    const request = createCustomElementsLanguageServiceRequestFromQueryData(queryData);
+
+    const importDiagnostics = getImportDiagnostics(request);
+    const nonClosedTagDiagnostics = getMissingCloseTagDiagnostics(0, request);
+
+    // TODO: Filter diagnostics calls by filetype. No need for imports for md etc.? Or is there?
+    const diagnostics = [...importDiagnostics, ...nonClosedTagDiagnostics];
+
     try {
-        let diagnostics = languageService?.getSemanticDiagnostics(fileName);
-        if (diagnostics === undefined) {
-            if (queryData.isValid) {
-                const request = createCustomElementsLanguageServiceRequestFromQueryData(queryData);
-
-                const importDiagnostics = getImportDiagnostics(request);
-                const nonClosedTagDiagnostics = getMissingCloseTagDiagnostics(0, request);
-
-                // TODO: Filter diagnostics calls by filetype. No need for imports for md etc.? Or is there?
-                diagnostics = [...importDiagnostics, ...nonClosedTagDiagnostics];
-            }
-        }
         const sendableDiagnostics: Array<Diagnostic> = diagnostics
             ?.map((diag: ts.Diagnostic) => tsDiagnosticToDiagnostic(diag, textDoc))
             .filter((diag: unknown): diag is Diagnostic => diag !== undefined) ?? [];
 
         connection.sendDiagnostics({ uri: textDoc.uri, diagnostics: sendableDiagnostics });
-    } catch (ex) {
-
-    }
-
+    } catch (ex) { }
 }

lib/server/src/handlers/completions.ts

@@ -2,7 +2,6 @@ import ts from "typescript";
 import { CompletionList, CompletionParams, CompletionItem } from "vscode-languageserver";
 import { textDocumentDataToUsableData } from "../transformers";
 import { documents } from "../text-documents";
-import { getLanguageService } from "../language-services/language-services";
 import { wait } from "../wait";
 import { elementKindToCompletionKind, getCompletionEntries } from "custom-elements-languageserver-core";
 import { createCustomElementsLanguageServiceRequest, createCustomElementsLanguageServiceRequestFromQueryData } from "../language-services/request";