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import { BrowseMilestonesSchema } from "./schema-readonly";
import { ManageMilestoneSchema } from "./schema";
import { gitlab, toQuery } from "../../utils/gitlab-api";
import { resolveNamespaceForAPI } from "../../utils/namespace";
import { ToolRegistry, EnhancedToolDefinition } from "../../types";
// assertDefined no longer needed - discriminated union provides type safety
import { isActionDenied } from "../../config";
/**
* Milestones tools registry - 2 CQRS tools replacing 9 individual tools
*
* browse_milestones (Query): list, get, issues, merge_requests, burndown
* manage_milestone (Command): create, update, delete, promote
*/
export const milestonesToolRegistry: ToolRegistry = new Map<string, EnhancedToolDefinition>([
// ============================================================================
// browse_milestones - CQRS Query Tool (discriminated union schema)
// TypeScript automatically narrows types in each switch case
// ============================================================================
[
"browse_milestones",
{
name: "browse_milestones",
description:
"Track milestone progress with associated issues and MRs. Actions: list (filter by state/title/search), get (milestone details), issues (items in milestone), merge_requests (MRs targeting milestone), burndown (chart data for sprint tracking). Related: manage_milestone to create/update.",
inputSchema: z.toJSONSchema(BrowseMilestonesSchema),
gate: { envVar: "USE_MILESTONE", defaultValue: true },
handler: async (args: unknown) => {
const input = BrowseMilestonesSchema.parse(args);
// Runtime validation: reject denied actions even if they bypass schema filtering
if (isActionDenied("browse_milestones", input.action)) {
throw new Error(`Action '${input.action}' is not allowed for browse_milestones tool`);
}
const { entityType, encodedPath } = await resolveNamespaceForAPI(input.namespace);
switch (input.action) {
case "list": {
const { action: _action, namespace: _namespace, ...rest } = input;
const query = toQuery(rest, []);
return gitlab.get(`${entityType}/${encodedPath}/milestones`, { query });
}
case "get": {
// TypeScript knows: input has milestone_id (uses global ID, not IID)
return gitlab.get(`${entityType}/${encodedPath}/milestones/${input.milestone_id}`);
}
case "issues": {
// TypeScript knows: input has milestone_id (uses global ID), per_page, page (optional)
const { action: _action, namespace: _namespace, milestone_id, ...rest } = input;
const query = toQuery(rest, []);
return gitlab.get(`${entityType}/${encodedPath}/milestones/${milestone_id}/issues`, {
query,
});
}
case "merge_requests": {
// TypeScript knows: input has milestone_id (uses global ID), per_page, page (optional)
const { action: _action, namespace: _namespace, milestone_id, ...rest } = input;
const query = toQuery(rest, []);
return gitlab.get(
`${entityType}/${encodedPath}/milestones/${milestone_id}/merge_requests`,
{ query }
);
}
case "burndown": {
// TypeScript knows: input has milestone_id (uses global ID), per_page, page (optional)
const { action: _action, namespace: _namespace, milestone_id, ...rest } = input;
const query = toQuery(rest, []);
return gitlab.get(
`${entityType}/${encodedPath}/milestones/${milestone_id}/burndown_events`,
{ query }
);
}
/* istanbul ignore next -- unreachable with Zod validation */
default:
throw new Error(`Unknown action: ${(input as { action: string }).action}`);
}
},
},
],
// ============================================================================
// manage_milestone - CQRS Command Tool (discriminated union schema)
// TypeScript automatically narrows types in each switch case
// ============================================================================
[
"manage_milestone",
{
name: "manage_milestone",
description:
"Create, update, or delete project/group milestones. Actions: create (title + optional dates/description), update (modify properties or close/activate), delete (remove permanently), promote (elevate project milestone to group). Related: browse_milestones for progress tracking.",
inputSchema: z.toJSONSchema(ManageMilestoneSchema),
gate: { envVar: "USE_MILESTONE", defaultValue: true },
handler: async (args: unknown) => {
const input = ManageMilestoneSchema.parse(args);
// Runtime validation: reject denied actions even if they bypass schema filtering
if (isActionDenied("manage_milestone", input.action)) {
throw new Error(`Action '${input.action}' is not allowed for manage_milestone tool`);
}
const { entityType, encodedPath } = await resolveNamespaceForAPI(input.namespace);
switch (input.action) {
case "create": {
// TypeScript knows: input has title (required), description, due_date, start_date (optional)
const { action: _action, namespace: _namespace, ...body } = input;
return gitlab.post(`${entityType}/${encodedPath}/milestones`, {
body,
contentType: "json",
});
}
case "update": {
// TypeScript knows: input has milestone_id (uses global ID), title, description, etc. (optional)
const { action: _action, namespace: _namespace, milestone_id, ...body } = input;
return gitlab.put(`${entityType}/${encodedPath}/milestones/${milestone_id}`, {
body,
contentType: "json",
});
}
case "delete": {
// TypeScript knows: input has milestone_id (uses global ID)
await gitlab.delete(`${entityType}/${encodedPath}/milestones/${input.milestone_id}`);
return { deleted: true };
}
case "promote": {
// TypeScript knows: input has milestone_id (uses global ID)
if (entityType !== "projects") {
throw new Error("Milestone promotion is only available for projects, not groups");
}
return gitlab.post(`projects/${encodedPath}/milestones/${input.milestone_id}/promote`);
}
/* istanbul ignore next -- unreachable with Zod discriminatedUnion */
default:
throw new Error(`Unknown action: ${(input as { action: string }).action}`);
}
},
},
],
]);
/**
* Get read-only tool names from the registry
*/
export function getMilestonesReadOnlyToolNames(): string[] {
return ["browse_milestones"];
}
/**
* Get all tool definitions from the registry
*/
export function getMilestonesToolDefinitions(): EnhancedToolDefinition[] {
return Array.from(milestonesToolRegistry.values());
}
/**
* Get filtered tools based on read-only mode
*/
export function getFilteredMilestonesTools(
readOnlyMode: boolean = false
): EnhancedToolDefinition[] {
if (readOnlyMode) {
const readOnlyNames = getMilestonesReadOnlyToolNames();
return Array.from(milestonesToolRegistry.values()).filter(tool =>
readOnlyNames.includes(tool.name)
);
}
return getMilestonesToolDefinitions();
}
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