refactor: separate fields flow to smaller files

src/ui/openProjectConfig.ts

@@ -0,0 +1,41 @@
+import { getProjectConfigPath } from "@/model/projectConfig";
+import { TASK_FILE_EXTENSION } from "@/model/taskFile";
+import * as vscode from "vscode";
+import {
+	type FrontmatterEditDeps,
+	resolveDocument,
+	resolveTaskFolder,
+} from "./editFrontmatterBase";
+
+export async function runOpenProjectConfig(
+	deps: FrontmatterEditDeps,
+	uriArg?: string,
+): Promise<void> {
+	const document = await resolveDocument(uriArg);
+	if (!document) {
+		void vscode.window.showErrorMessage(
+			`Open a ${TASK_FILE_EXTENSION} task file first`,
+		);
+		return;
+	}
+
+	const folder = await resolveTaskFolder(document, deps.config);
+	if (!folder) {
+		void vscode.window.showErrorMessage(
+			"Task file is outside a configured task folder",
+		);
+		return;
+	}
+
+	const configPath = getProjectConfigPath(folder);
+	const uri = vscode.Uri.file(configPath);
+
+	try {
+		const doc = await vscode.workspace.openTextDocument(uri);
+		await vscode.window.showTextDocument(doc);
+	} catch {
+		void vscode.window.showErrorMessage(
+			`Could not open config file: ${configPath}`,
+		);
+	}
+}