Add download button to photo viewer

internal/api/download.go

@@ -0,0 +1,48 @@
+package api
+
+import (
+	"fmt"
+
+	"github.com/photoprism/photoprism/internal/config"
+	"github.com/photoprism/photoprism/internal/util"
+	log "github.com/sirupsen/logrus"
+
+	"github.com/gin-gonic/gin"
+	"github.com/photoprism/photoprism/internal/photoprism"
+)
+
+// GET /api/v1/download/:hash
+//
+// Parameters:
+//   hash: string The file hash as returned by the search API
+func GetDownload(router *gin.RouterGroup, conf *config.Config) {
+	router.GET("/download/:hash", func(c *gin.Context) {
+		fileHash := c.Param("hash")
+
+		search := photoprism.NewSearch(conf.OriginalsPath(), conf.Db())
+		file, err := search.FindFileByHash(fileHash)
+
+		if err != nil {
+			c.AbortWithStatusJSON(404, gin.H{"error": err.Error()})
+			return
+		}
+
+		fileName := fmt.Sprintf("%s/%s", conf.OriginalsPath(), file.FileName)
+
+		if !util.Exists(fileName) {
+			log.Errorf("could not find original: %s", fileHash)
+			c.Data(404, "image/svg+xml", photoIconSvg)
+
+			// Set missing flag so that the file doesn't show up in search results anymore
+			file.FileMissing = true
+			conf.Db().Save(&file)
+			return
+		}
+
+		downloadFileName := file.DownloadFileName(conf.Db())
+
+		c.Header("Content-Disposition", fmt.Sprintf("attachment; filename=%s", downloadFileName))
+
+		c.File(fileName)
+	})
+}