feat: display image resolutions in file details (#2830)

---------

Co-authored-by: MAERYO <[email protected]>

files/file.go

@@ -7,6 +7,7 @@ import (
 	"crypto/sha512"
 	"encoding/hex"
 	"hash"
+	"image"
 	"io"
 	"log"
 	"mime"
@@ -44,6 +45,7 @@ type FileInfo struct {
 	Checksums  map[string]string `json:"checksums,omitempty"`
 	Token      string            `json:"token,omitempty"`
 	currentDir []os.FileInfo     `json:"-"`
+	Resolution *ImageResolution  `json:"resolution,omitempty"`
 }
 
 // FileOptions are the options when getting a file info.
@@ -58,6 +60,11 @@ type FileOptions struct {
 	Content    bool
 }
 
+type ImageResolution struct {
+	Width  int `json:"width"`
+	Height int `json:"height"`
+}
+
 // NewFileInfo creates a File object from a path and a given user. This File
 // object will be automatically filled depending on if it is a directory
 // or a file. If it's a video file, it will also detect any subtitles.
@@ -236,6 +243,12 @@ func (i *FileInfo) detectType(modify, saveContent, readHeader bool) error {
 		return nil
 	case strings.HasPrefix(mimetype, "image"):
 		i.Type = "image"
+		resolution, err := calculateImageResolution(i.Fs, i.Path)
+		if err != nil {
+			log.Printf("Error calculating image resolution: %v", err)
+		} else {
+			i.Resolution = resolution
+		}
 		return nil
 	case strings.HasSuffix(mimetype, "pdf"):
 		i.Type = "pdf"
@@ -264,6 +277,28 @@ func (i *FileInfo) detectType(modify, saveContent, readHeader bool) error {
 	return nil
 }
 
+func calculateImageResolution(fs afero.Fs, filePath string) (*ImageResolution, error) {
+	file, err := fs.Open(filePath)
+	if err != nil {
+		return nil, err
+	}
+	defer func() {
+		if cErr := file.Close(); cErr != nil {
+			log.Printf("Failed to close file: %v", cErr)
+		}
+	}()
+
+	config, _, err := image.DecodeConfig(file)
+	if err != nil {
+		return nil, err
+	}
+
+	return &ImageResolution{
+		Width:  config.Width,
+		Height: config.Height,
+	}, nil
+}
+
 func (i *FileInfo) readFirstBytes() []byte {
 	reader, err := i.Fs.Open(i.Path)
 	if err != nil {
@@ -361,6 +396,15 @@ func (i *FileInfo) readListing(checker rules.Checker, readHeader bool) error {
 			currentDir: dir,
 		}
 
+		if !file.IsDir && strings.HasPrefix(mime.TypeByExtension(file.Extension), "image/") {
+			resolution, err := calculateImageResolution(file.Fs, file.Path)
+			if err != nil {
+				log.Printf("Error calculating resolution for image %s: %v", file.Path, err)
+			} else {
+				file.Resolution = resolution
+			}
+		}
+
 		if file.IsDir {
 			listing.NumDirs++
 		} else {

frontend/src/components/prompts/Info.vue

@@ -12,10 +12,17 @@
       <p class="break-word" v-if="selected.length < 2">
         <strong>{{ $t("prompts.displayName") }}</strong> {{ name }}
       </p>
+
       <p v-if="!dir || selected.length > 1">
         <strong>{{ $t("prompts.size") }}:</strong>
         <span id="content_length"></span> {{ humanSize }}
       </p>
+
+      <div v-if="resolution">
+        <strong>{{ $t("prompts.resolution") }}:</strong>
+        {{ resolution.width }} x {{ resolution.height }}
+      </div>
+
       <p v-if="selected.length < 2" :title="modTime">
         <strong>{{ $t("prompts.lastModified") }}:</strong> {{ humanTime }}
       </p>
@@ -126,6 +133,18 @@ export default {
           : this.req.items[this.selected[0]].isDir)
       );
     },
+    resolution: function() {
+      if (this.selectedCount === 1) {
+        const selectedItem = this.req.items[this.selected[0]];
+        if (selectedItem && selectedItem.type === 'image') {
+          return selectedItem.resolution;
+        }
+      }
+      else if (this.req && this.req.type === 'image') {
+        return this.req.resolution;
+      }
+      return null;
+    },
   },
   methods: {
     checksum: async function (event, algo) {

frontend/src/i18n/en.json

@@ -161,7 +161,8 @@
     "upload": "Upload",
     "uploadFiles": "Uploading {files} files...",
     "uploadMessage": "Select an option to upload.",
-    "optionalPassword": "Optional password"
+    "optionalPassword": "Optional password",
+    "resolution": "Resolution"
   },
   "search": {
     "images": "Images",