Refacture structure proposal. (#1793)

command/scan-bar.go

@@ -0,0 +1,61 @@
+/*
+ * Minio Client (C) 2014-2016 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package command
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/cheggaaa/pb"
+	"github.com/dustin/go-humanize"
+	"github.com/minio/mc/pkg/console"
+	"github.com/minio/minio/pkg/probe"
+)
+
+// fixateScanBar truncates or stretches text to fit within the terminal size.
+func fixateScanBar(text string, width int) string {
+	if len([]rune(text)) > width {
+		// Trim text to fit within the screen
+		trimSize := len([]rune(text)) - width + 3 //"..."
+		if trimSize < len([]rune(text)) {
+			text = "..." + text[trimSize:]
+		}
+	} else {
+		text += strings.Repeat(" ", width-len([]rune(text)))
+	}
+	return text
+}
+
+// Progress bar function report objects being scaned.
+type scanBarFunc func(string)
+
+// scanBarFactory returns a progress bar function to report URL scanning.
+func scanBarFactory() scanBarFunc {
+	fileCount := 0
+	termWidth, e := pb.GetTerminalWidth()
+	fatalIf(probe.NewError(e), "Unable to get terminal size. Please use --quiet option.")
+
+	// Cursor animate channel.
+	cursorCh := cursorAnimate()
+	return func(source string) {
+		scanPrefix := fmt.Sprintf("[%s] %s ", humanize.Comma(int64(fileCount)), string(<-cursorCh))
+		source = fixateScanBar(source, termWidth-len([]rune(scanPrefix)))
+		barText := scanPrefix + source
+		console.PrintC("\r" + barText + "\r")
+		fileCount++
+	}
+}