feat: add get issue by index

operation/issue/issue.go

@@ -0,0 +1,52 @@
+package issue
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+
+	"gitea.com/gitea/gitea-mcp/pkg/gitea"
+	"github.com/mark3labs/mcp-go/mcp"
+)
+
+const (
+	GetIssueByIndexToolName = "get_issue_by_index"
+)
+
+var (
+	GetIssueByIndexTool = mcp.NewTool(
+		GetIssueByIndexToolName,
+		mcp.WithDescription("get issue by index"),
+		mcp.WithString(
+			"owner",
+			mcp.Required(),
+			mcp.Description("repository owner"),
+		),
+		mcp.WithString(
+			"repo",
+			mcp.Required(),
+			mcp.Description("repository name"),
+		),
+		mcp.WithNumber(
+			"index",
+			mcp.Required(),
+			mcp.Description("repository issue index"),
+		),
+	)
+)
+
+func GetIssueByIndexFn(ctx context.Context, request mcp.CallToolRequest) (*mcp.CallToolResult, error) {
+	owner := request.Params.Arguments["owner"].(string)
+	repo := request.Params.Arguments["repo"].(string)
+	index := request.Params.Arguments["index"].(float64)
+	issue, _, err := gitea.Client().GetIssue(owner, repo, int64(index))
+	if err != nil {
+		return mcp.NewToolResultError(fmt.Sprintf("get %v/%v/issue/%v err", owner, repo, int64(index))), err
+	}
+
+	result, err := json.Marshal(issue)
+	if err != nil {
+		return mcp.NewToolResultError("marshal issue err"), err
+	}
+	return mcp.NewToolResultText(string(result)), nil
+}