admin: Read challenge.json from imported directory

settings/challenge.go

@@ -3,6 +3,7 @@ package settings
 import (
 	"encoding/json"
 	"os"
+	"strings"
 )
 
 // ChallengeFile is the expected name of the file containing the challenge infos.
@@ -28,20 +29,15 @@ type ChallengeInfo struct {
 }
 
 // ReadChallenge parses the file at the given location.
-func ReadChallengeInfo(path string) (*ChallengeInfo, error) {
+func ReadChallengeInfo(content string) (*ChallengeInfo, error) {
 	var s ChallengeInfo
-	if fd, err := os.Open(path); err != nil {
-		return nil, err
-	} else {
-		defer fd.Close()
-		jdec := json.NewDecoder(fd)
+	jdec := json.NewDecoder(strings.NewReader(content))
 
-		if err := jdec.Decode(&s); err != nil {
-			return &s, err
-		}
-
-		return &s, nil
+	if err := jdec.Decode(&s); err != nil {
+		return &s, err
 	}
+
+	return &s, nil
 }
 
 // SaveChallenge saves challenge at the given location.