From 2bae30a841ec3399c53edd7893874070a9d47a3b Mon Sep 17 00:00:00 2001
From: Pierre-Olivier Mercier <nemunaire@nemunai.re>
Date: Sun, 19 Jan 2020 00:54:00 +0100
Subject: [PATCH] admin/api: new route to list remote files and their
 properties

---
 admin/api/file.go            |  3 +++
 admin/sync/exercice_files.go | 34 ++++++++++++++++++++++++++++++++++
 libfic/file.go               |  4 ++--
 3 files changed, 39 insertions(+), 2 deletions(-)

diff --git a/admin/api/file.go b/admin/api/file.go
index 6b28b7e7..ca7cce88 100644
--- a/admin/api/file.go
+++ b/admin/api/file.go
@@ -29,6 +29,9 @@ func init() {
 	router.PUT("/api/exercices/:eid/files/:fid", apiHandler(exerciceFileHandler(updateFile)))
 	router.DELETE("/api/exercices/:eid/files/:fid", apiHandler(exerciceFileHandler(deleteFile)))
 
+	// Remote
+	router.GET("/api/remote/themes/:thid/exercices/:exid/files", apiHandler(sync.ApiGetRemoteExerciceFiles))
+
 	// Check
 	router.POST("/api/files/:fileid/check", apiHandler(fileHandler(checkFile)))
 
diff --git a/admin/sync/exercice_files.go b/admin/sync/exercice_files.go
index 4d7e240c..3ca071a2 100644
--- a/admin/sync/exercice_files.go
+++ b/admin/sync/exercice_files.go
@@ -3,11 +3,14 @@ package sync
 import (
 	"bufio"
 	"encoding/hex"
+	"errors"
 	"fmt"
 	"path"
 	"strings"
 	"unicode"
 
+	"github.com/julienschmidt/httprouter"
+
 	"srs.epita.fr/fic-server/libfic"
 )
 
@@ -137,3 +140,34 @@ func SyncExerciceFiles(i Importer, exercice fic.Exercice) (errs []string) {
 	}
 	return
 }
+
+// ApiGetRemoteExerciceFiles is an accessor to remote exercice files list.
+func ApiGetRemoteExerciceFiles(ps httprouter.Params, _ []byte) (interface{}, error) {
+	theme, errs := BuildTheme(GlobalImporter, ps.ByName("thid"))
+	if theme != nil {
+		exercice, _, _, _, errs := BuildExercice(GlobalImporter, *theme, path.Join(theme.Path, ps.ByName("exid")), nil)
+		if exercice != nil {
+			files, digests, errs := BuildFilesListInto(GlobalImporter, *exercice, "files")
+			if files != nil {
+				var ret []fic.EFile
+				for _, fname := range files {
+					fPath := path.Join(exercice.Path, "files", fname)
+					fSize, _ := getFileSize(GlobalImporter, fPath)
+					ret = append(ret, fic.EFile{
+						Path: fPath,
+						Name: fname,
+						Checksum: digests[fname],
+						Size: fSize,
+					})
+				}
+				return ret, nil
+			} else {
+				return nil, errors.New(fmt.Sprintf("%q", errs))
+			}
+		} else {
+			return nil, errors.New(fmt.Sprintf("%q", errs))
+		}
+	} else {
+		return nil, errors.New(fmt.Sprintf("%q", errs))
+	}
+}
diff --git a/libfic/file.go b/libfic/file.go
index d2dbe693..1e565a6b 100644
--- a/libfic/file.go
+++ b/libfic/file.go
@@ -29,13 +29,13 @@ var PlainDigest bool = false
 
 // EFile represents a challenge file.
 type EFile struct {
-	Id int64 `json:"id"`
+	Id int64 `json:"id,omitempty"`
 	// origin holds the import relative path of the file
 	origin string
 	// Path is the location where the file is stored, relatively to FilesDir
 	Path string `json:"path"`
 	// IdExercice is the identifier of the underlying challenge
-	IdExercice int64 `json:"idExercice"`
+	IdExercice int64 `json:"idExercice,omitempty"`
 	// Name is the title displayed to players
 	Name string `json:"name"`
 	// Checksum stores the cached hash of the file