From 428da4bcfedb3d3a2441d1d236f861e72ee8f5c6 Mon Sep 17 00:00:00 2001
From: Petter Rasmussen
Date: Sun, 21 Feb 2016 12:55:09 +0100
Subject: Support downloading files by query

---
 drive/download.go | 41 +++++++++++++++++++++++++++++++++++++++++
 gdrive.go         | 33 +++++++++++++++++++++++++++++++++
 handlers_drive.go | 13 +++++++++++++
 3 files changed, 87 insertions(+)

diff --git a/drive/download.go b/drive/download.go
index a33373f..1779d57 100644
--- a/drive/download.go
+++ b/drive/download.go
@@ -58,6 +58,47 @@ func (self *Drive) Download(args DownloadArgs) error {
     return err
 }
 
+type DownloadQueryArgs struct {
+    Out io.Writer
+    Progress io.Writer
+    Query string
+    Path string
+    Force bool
+    Recursive bool
+}
+
+func (self *Drive) DownloadQuery(args DownloadQueryArgs) error {
+    listArgs := listAllFilesArgs{
+        query: args.Query,
+        fields: []googleapi.Field{"nextPageToken", "files(id,name,mimeType,size,md5Checksum)"},
+    }
+    files, err := self.listAllFiles(listArgs)
+    if err != nil {
+        return fmt.Errorf("Failed to list files: %s", err)
+    }
+
+    downloadArgs := DownloadArgs{
+        Out: args.Out,
+        Progress: args.Progress,
+        Path: args.Path,
+        Force: args.Force,
+    }
+
+    for _, f := range files {
+        if isDir(f) && args.Recursive {
+            err = self.downloadDirectory(f, downloadArgs)
+        } else if isBinary(f) {
+            _, _, err = self.downloadBinary(f, downloadArgs)
+        }
+
+        if err != nil {
+            return err
+        }
+    }
+
+    return nil
+}
+
 func (self *Drive) downloadRecursive(args DownloadArgs) error {
     f, err := self.service.Files.Get(args.Id).Fields("id", "name", "size", "mimeType", "md5Checksum").Do()
     if err != nil {
diff --git a/gdrive.go b/gdrive.go
index f89688b..ffcf30f 100644
--- a/gdrive.go
+++ b/gdrive.go
@@ -131,6 +131,39 @@ func main() {
                 ),
             },
         },
+        &cli.Handler{
+            Pattern: "[global] download query [options] <query>",
+            Description: "Download all files and directories matching query",
+            Callback: downloadQueryHandler,
+            FlagGroups: cli.FlagGroups{
+                cli.NewFlagGroup("global", globalFlags...),
+                cli.NewFlagGroup("options",
+                    cli.BoolFlag{
+                        Name: "force",
+                        Patterns: []string{"-f", "--force"},
+                        Description: "Overwrite existing file",
+                        OmitValue: true,
+                    },
+                    cli.BoolFlag{
+                        Name: "recursive",
+                        Patterns: []string{"-r", "--recursive"},
+                        Description: "Download directories recursively, documents will be skipped",
+                        OmitValue: true,
+                    },
+                    cli.StringFlag{
+                        Name: "path",
+                        Patterns: []string{"--path"},
+                        Description: "Download path",
+                    },
+                    cli.BoolFlag{
+                        Name: "noProgress",
+                        Patterns: []string{"--no-progress"},
+                        Description: "Hide progress",
+                        OmitValue: true,
+                    },
+                ),
+            },
+        },
         &cli.Handler{
             Pattern: "[global] upload [options] <path>",
             Description: "Upload file or directory",
diff --git a/handlers_drive.go b/handlers_drive.go
index 957161f..3698d0e 100644
--- a/handlers_drive.go
+++ b/handlers_drive.go
@@ -61,6 +61,19 @@ func downloadHandler(ctx cli.Context) {
     checkErr(err)
 }
 
+func downloadQueryHandler(ctx cli.Context) {
+    args := ctx.Args()
+    err := newDrive(args).DownloadQuery(drive.DownloadQueryArgs{
+        Out: os.Stdout,
+        Query: args.String("query"),
+        Force: args.Bool("force"),
+        Recursive: args.Bool("recursive"),
+        Path: args.String("path"),
+        Progress: progressWriter(args.Bool("noProgress")),
+    })
+    checkErr(err)
+}
+
 func downloadSyncHandler(ctx cli.Context) {
     args := ctx.Args()
     cachePath := filepath.Join(args.String("configDir"), DefaultCacheFileName)
-- 
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