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import { BrowseFilesSchema } from "./schema-readonly";
import { ManageFilesSchema } from "./schema";
import { gitlab, toQuery } from "../../utils/gitlab-api";
import { normalizeProjectId } from "../../utils/projectIdentifier";
import { enhancedFetch } from "../../utils/fetch";
import { ToolRegistry, EnhancedToolDefinition } from "../../types";
import { isActionDenied } from "../../config";
/**
* Files tools registry - 2 CQRS tools replacing 5 individual tools
*
* browse_files (Query): tree listing + file content reading
* manage_files (Command): single file, batch commit, markdown upload
*/
export const filesToolRegistry: ToolRegistry = new Map<string, EnhancedToolDefinition>([
// ============================================================================
// browse_files - CQRS Query Tool (discriminated union schema)
// TypeScript automatically narrows types in each switch case
// ============================================================================
[
"browse_files",
{
name: "browse_files",
description:
'BROWSE repository files. Actions: "tree" lists files/folders with pagination, "content" reads file contents. Use for exploring project structure or reading source code.',
inputSchema: z.toJSONSchema(BrowseFilesSchema),
gate: { envVar: "USE_FILES", defaultValue: true },
handler: async (args: unknown) => {
const input = BrowseFilesSchema.parse(args);
// Runtime validation: reject denied actions even if they bypass schema filtering
Iif (isActionDenied("browse_files", input.action)) {
throw new Error(`Action '${input.action}' is not allowed for browse_files tool`);
}
switch (input.action) {
case "tree": {
// TypeScript knows: input has path, recursive, per_page, page (optional)
const query: Record<string, string | number | boolean | undefined> = {};
if (input.path) query.path = input.path;
if (input.ref) query.ref = input.ref;
if (input.recursive !== undefined) query.recursive = input.recursive;
if (input.per_page !== undefined) query.per_page = input.per_page;
Iif (input.page !== undefined) query.page = input.page;
return gitlab.get(`projects/${normalizeProjectId(input.project_id)}/repository/tree`, {
query: toQuery(query, []),
});
}
case "content": {
// TypeScript knows: input has file_path (required)
const queryParams = new URLSearchParams();
if (input.ref) queryParams.set("ref", input.ref);
const apiUrl = `${process.env.GITLAB_API_URL}/api/v4/projects/${normalizeProjectId(input.project_id)}/repository/files/${encodeURIComponent(input.file_path)}/raw?${queryParams}`;
const response = await enhancedFetch(apiUrl);
if (!response.ok) {
throw new Error(`GitLab API error: ${response.status} ${response.statusText}`);
}
const content = await response.text();
return {
file_path: input.file_path,
ref: input.ref ?? "HEAD",
size: content.length,
content: content,
content_type: response.headers.get("content-type") ?? "text/plain",
};
}
/* istanbul ignore next -- unreachable with Zod discriminatedUnion */
default:
throw new Error(`Unknown action: ${(input as { action: string }).action}`);
}
},
},
],
// ============================================================================
// manage_files - CQRS Command Tool (discriminated union schema)
// TypeScript automatically narrows types in each switch case
// ============================================================================
[
"manage_files",
{
name: "manage_files",
description:
'MANAGE repository files. Actions: "single" creates/updates one file, "batch" commits multiple files atomically, "upload" adds markdown attachments.',
inputSchema: z.toJSONSchema(ManageFilesSchema),
gate: { envVar: "USE_FILES", defaultValue: true },
handler: async (args: unknown) => {
const input = ManageFilesSchema.parse(args);
// Runtime validation: reject denied actions even if they bypass schema filtering
Iif (isActionDenied("manage_files", input.action)) {
throw new Error(`Action '${input.action}' is not allowed for manage_files tool`);
}
switch (input.action) {
case "single": {
// TypeScript knows: input has file_path, content, commit_message, branch (required)
const { project_id, file_path, action: _action, ...body } = input;
return gitlab.post(
`projects/${normalizeProjectId(project_id)}/repository/files/${encodeURIComponent(file_path)}`,
{ body, contentType: "form" }
);
}
case "batch": {
// TypeScript knows: input has files, branch, commit_message (required)
const actions = input.files.map(file => ({
action: "create",
file_path: file.file_path,
content: file.content,
encoding: file.encoding ?? "text",
execute_filemode: file.execute_filemode ?? false,
}));
const body: Record<string, unknown> = {
branch: input.branch,
commit_message: input.commit_message,
actions,
};
if (input.start_branch) body.start_branch = input.start_branch;
if (input.author_email) body.author_email = input.author_email;
if (input.author_name) body.author_name = input.author_name;
return gitlab.post(
`projects/${normalizeProjectId(input.project_id)}/repository/commits`,
{ body, contentType: "json" }
);
}
case "upload": {
// TypeScript knows: input has file, filename (required)
const formData = new FormData();
const buffer = Buffer.from(input.file, "base64");
// Buffer is a Uint8Array subclass, can be passed directly to File constructor
const fileObj = new File([buffer], input.filename, {
type: "application/octet-stream",
});
formData.append("file", fileObj);
return gitlab.post(`projects/${normalizeProjectId(input.project_id)}/uploads`, {
body: formData,
});
}
/* istanbul ignore next -- unreachable with Zod discriminatedUnion */
default:
throw new Error(`Unknown action: ${(input as { action: string }).action}`);
}
},
},
],
]);
export function getFilesReadOnlyToolNames(): string[] {
return ["browse_files"];
}
export function getFilesToolDefinitions(): EnhancedToolDefinition[] {
return Array.from(filesToolRegistry.values());
}
export function getFilteredFilesTools(readOnlyMode: boolean = false): EnhancedToolDefinition[] {
if (readOnlyMode) {
const readOnlyNames = getFilesReadOnlyToolNames();
return Array.from(filesToolRegistry.values()).filter(tool => readOnlyNames.includes(tool.name));
}
return getFilesToolDefinitions();
}
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