From 05ed4dd4ed49a0cd66cc9a2611144046ceac2303 Mon Sep 17 00:00:00 2001
From: Joren <jorensc@riseup.net>
Date: Wed, 11 Mar 2026 17:51:34 +0100
Subject: [PATCH] Prevent dupes in fo mode

---
 internal/canvas/client.go | 36 ++++++++++++++++++++++++++----------
 1 file changed, 26 insertions(+), 10 deletions(-)

diff --git a/internal/canvas/client.go b/internal/canvas/client.go
index c460422..9e9beb1 100644
--- a/internal/canvas/client.go
+++ b/internal/canvas/client.go
@@ -17,19 +17,21 @@ import (
 )
 
 type Client struct {
-	HTTPClient  *http.Client
-	AccessToken string
-	CourseID    string
-	CourseName  string
-	FilesOnly   bool
+	HTTPClient      *http.Client
+	AccessToken     string
+	CourseID        string
+	CourseName      string
+	FilesOnly       bool
+	downloadedFiles map[string]bool
 }
 
 func NewClient(httpClient *http.Client, accessToken, courseID string, filesOnly bool) *Client {
 	return &Client{
-		HTTPClient:  httpClient,
-		AccessToken: accessToken,
-		CourseID:    courseID,
-		FilesOnly:   filesOnly,
+		HTTPClient:      httpClient,
+		AccessToken:     accessToken,
+		CourseID:        courseID,
+		FilesOnly:       filesOnly,
+		downloadedFiles: make(map[string]bool),
 	}
 }
 
@@ -82,6 +84,13 @@ func (c *Client) DownloadCourseFiles(root string) {
 	fileCount := 0
 	for _, file := range files {
 
+		if c.FilesOnly {
+			if c.downloadedFiles[file.DisplayName] {
+				continue
+			}
+			c.downloadedFiles[file.DisplayName] = true
+		}
+
 		rawFolderPath := folderMap[file.FolderID]
 		safeFolderPath := utils.SanitizePath(rawFolderPath)
 
@@ -223,11 +232,18 @@ func (c *Client) downloadModuleFile(item models.ModuleItem, dir string) {
 		return
 	}
 
+	if c.FilesOnly {
+		if c.downloadedFiles[fileMeta.DisplayName] {
+			return
+		}
+		c.downloadedFiles[fileMeta.DisplayName] = true
+	}
+
 	ext := filepath.Ext(fileMeta.DisplayName)
 	origBase := strings.TrimSuffix(fileMeta.DisplayName, ext)
 
 	fileName := fileMeta.DisplayName
-	if !strings.EqualFold(origBase, item.Title) && item.Title != "" {
+	if !c.FilesOnly && !strings.EqualFold(origBase, item.Title) && item.Title != "" {
 		fileName = fmt.Sprintf("%s (%s)%s", origBase, item.Title, ext)
 	}