func ListPullRequests()

in pkg/github/pullrequests.go [200:306]
102 lines of code
14 McCabe index (conditional complexity)

func ListPullRequests(getClient GetClientFn, t translations.TranslationHelperFunc) (tool mcp.Tool, handler server.ToolHandlerFunc) {
	return mcp.NewTool("list_pull_requests",
			mcp.WithDescription(t("TOOL_LIST_PULL_REQUESTS_DESCRIPTION", "List pull requests in a GitHub repository.")),
			mcp.WithToolAnnotation(mcp.ToolAnnotation{
				Title:        t("TOOL_LIST_PULL_REQUESTS_USER_TITLE", "List pull requests"),
				ReadOnlyHint: true,
			}),
			mcp.WithString("owner",
				mcp.Required(),
				mcp.Description("Repository owner"),
			),
			mcp.WithString("repo",
				mcp.Required(),
				mcp.Description("Repository name"),
			),
			mcp.WithString("state",
				mcp.Description("Filter by state"),
				mcp.Enum("open", "closed", "all"),
			),
			mcp.WithString("head",
				mcp.Description("Filter by head user/org and branch"),
			),
			mcp.WithString("base",
				mcp.Description("Filter by base branch"),
			),
			mcp.WithString("sort",
				mcp.Description("Sort by"),
				mcp.Enum("created", "updated", "popularity", "long-running"),
			),
			mcp.WithString("direction",
				mcp.Description("Sort direction"),
				mcp.Enum("asc", "desc"),
			),
			WithPagination(),
		),
		func(ctx context.Context, request mcp.CallToolRequest) (*mcp.CallToolResult, error) {
			owner, err := requiredParam[string](request, "owner")
			if err != nil {
				return mcp.NewToolResultError(err.Error()), nil
			}
			repo, err := requiredParam[string](request, "repo")
			if err != nil {
				return mcp.NewToolResultError(err.Error()), nil
			}
			state, err := OptionalParam[string](request, "state")
			if err != nil {
				return mcp.NewToolResultError(err.Error()), nil
			}
			head, err := OptionalParam[string](request, "head")
			if err != nil {
				return mcp.NewToolResultError(err.Error()), nil
			}
			base, err := OptionalParam[string](request, "base")
			if err != nil {
				return mcp.NewToolResultError(err.Error()), nil
			}
			sort, err := OptionalParam[string](request, "sort")
			if err != nil {
				return mcp.NewToolResultError(err.Error()), nil
			}
			direction, err := OptionalParam[string](request, "direction")
			if err != nil {
				return mcp.NewToolResultError(err.Error()), nil
			}
			pagination, err := OptionalPaginationParams(request)
			if err != nil {
				return mcp.NewToolResultError(err.Error()), nil
			}

			opts := &github.PullRequestListOptions{
				State:     state,
				Head:      head,
				Base:      base,
				Sort:      sort,
				Direction: direction,
				ListOptions: github.ListOptions{
					PerPage: pagination.perPage,
					Page:    pagination.page,
				},
			}

			client, err := getClient(ctx)
			if err != nil {
				return nil, fmt.Errorf("failed to get GitHub client: %w", err)
			}
			prs, resp, err := client.PullRequests.List(ctx, owner, repo, opts)
			if err != nil {
				return nil, fmt.Errorf("failed to list pull requests: %w", err)
			}
			defer func() { _ = resp.Body.Close() }()

			if resp.StatusCode != http.StatusOK {
				body, err := io.ReadAll(resp.Body)
				if err != nil {
					return nil, fmt.Errorf("failed to read response body: %w", err)
				}
				return mcp.NewToolResultError(fmt.Sprintf("failed to list pull requests: %s", string(body))), nil
			}

			r, err := json.Marshal(prs)
			if err != nil {
				return nil, fmt.Errorf("failed to marshal response: %w", err)
			}

			return mcp.NewToolResultText(string(r)), nil
		}
}