fix aggregate

reporter/reporter.go

@@ -4,6 +4,9 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
+	"os"
+	"path/filepath"
+	"sort"
 	"strings"
 
 	"github.com/Mond1c/judge/runner"
@@ -74,6 +77,60 @@ type jsonTestResult struct {
 	Failures  []string `json:"failures,omitempty"`
 }
 
+func Aggregate(w io.Writer, dir string) error {
+	files, err := filepath.Glob(filepath.Join(dir, "*", "*.json"))
+	if err != nil {
+		return fmt.Errorf("glob reports: %w", err)
+	}
+	if len(files) == 0 {
+		files, _ = filepath.Glob(filepath.Join(dir, "*.json"))
+	}
+	if len(files) == 0 {
+		return fmt.Errorf("no JSON reports found in %s", dir)
+	}
+	sort.Strings(files)
+
+	type entry struct {
+		Config string
+		Score  float64
+	}
+
+	var entries []entry
+	allPassed := true
+
+	for _, f := range files {
+		data, err := os.ReadFile(f)
+		if err != nil {
+			return fmt.Errorf("read %s: %w", f, err)
+		}
+		var report jsonSuiteResult
+		if err := json.Unmarshal(data, &report); err != nil {
+			return fmt.Errorf("parse %s: %w", f, err)
+		}
+
+		cfg := filepath.Base(filepath.Dir(f))
+		cfg = strings.TrimPrefix(cfg, "report_")
+
+		entries = append(entries, entry{Config: cfg, Score: report.TotalScore})
+		if report.TotalScore < 0.9999 {
+			allPassed = false
+		}
+	}
+
+	fmt.Fprintln(w, "# Judge results")
+	fmt.Fprintln(w)
+	fmt.Fprintln(w, "| Configuration | Score |")
+	fmt.Fprintln(w, "|---|---|")
+	for _, e := range entries {
+		fmt.Fprintf(w, "| %s | %.4f |\n", e.Config, e.Score)
+	}
+
+	if !allPassed {
+		return fmt.Errorf("one or more configurations scored below 1.0")
+	}
+	return nil
+}
+
 func jsonResult(r *runner.SuiteResult) jsonSuiteResult {
 	res := jsonSuiteResult{
 		TotalScore: r.TotalScore,