Implement CSVReader and CSVWriter to be used for password import and export.

components/password_manager/core/browser/export/csv_writer.cc

Index: components/password_manager/core/browser/export/csv_writer.cc
diff --git a/components/password_manager/core/browser/export/csv_writer.cc b/components/password_manager/core/browser/export/csv_writer.cc
new file mode 100644
index 0000000000000000000000000000000000000000..b174062d511c1dce08d5d872bb99a827e7aa2d06
--- /dev/null
+++ b/components/password_manager/core/browser/export/csv_writer.cc
@@ -0,0 +1,84 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "components/password_manager/core/browser/export/csv_writer.h"
+
+#include "base/logging.h"
+
+namespace {
+
+#if defined(OS_WIN)
+const char kLineEnding[] = "\r\n";
+#else
+const char kLineEnding[] = "\n";
+#endif
+
+// Escapes the |raw_value| of one field if needed, and appends it to |out|.
+void AppendValue(const std::string& raw_value, std::string* out) {
+  // Fields containing line breaks (CRLF), double quotes, and commas should be
+  // enclosed in double-quotes.
+  if (raw_value.find_first_of("\r\n\",") == std::string::npos) {
+    *out += raw_value;
+    return;
+  }
+
+  // If double-quotes are used to enclose fields, then a double-quote appearing
+  // inside a field must be escaped by preceding it with another double quote.
+  out->push_back('\"');
+  for (size_t i = 0; i < raw_value.size(); ++i) {
+    out->push_back(raw_value[i]);
+    if (raw_value[i] == '\"')
+      out->push_back('\"');
+  }
+  out->push_back('\"');
+}
+
+// Appends the platform-specific EOL terminator to |out|.
+void AppendLineSeparator(std::string* out) {
+  *out += kLineEnding;
+}
+
+// Appends a field separator to |out|.
+void AppendFieldSeparator(std::string* out) {
+  out->push_back(',');
+}
+
+}  // namespace
+
+namespace password_manager {
+
+// static
+void CSVWriter::Write(const std::vector<std::string>& column_names,
+                      const std::vector<ColumnNameToValueMap>& records,
+                      std::string* csv) {
+  DCHECK(csv);
+
+  csv->clear();
+
+  // Append header row.
+  typedef std::vector<std::string>::const_iterator ConstFieldIterator;

[vasilii, 2014/08/06 17:42:16]

ConstColumnIterator?

[engedy, 2014/08/08 17:06:12]

Done.

+  for (ConstFieldIterator it_column_name = column_names.begin();
+       it_column_name != column_names.end(); ++it_column_name) {
+    if (it_column_name != column_names.begin())
+      AppendFieldSeparator(csv);
+    AppendValue(*it_column_name, csv);
+  }
+  AppendLineSeparator(csv);
+
+  // Append every other data record row.
+  typedef std::vector<ColumnNameToValueMap>::const_iterator ConstRecordIterator;
+  for (ConstRecordIterator it_row = records.begin();
+       it_row != records.end(); ++it_row) {
+    for (ConstFieldIterator it_column_name = column_names.begin();
+        it_column_name != column_names.end(); ++it_column_name) {
+      if (it_column_name != column_names.begin())
+        AppendFieldSeparator(csv);
+      if (it_row->count(*it_column_name))
+        AppendValue(it_row->at(*it_column_name), csv);

[vasilii, 2014/08/06 17:42:16]

It's C++11 feature.

[engedy, 2014/08/08 17:06:12]

Done. Replaced with find()-based solution.

+    }
+    AppendLineSeparator(csv);
+  }
+}
+
+}  // namespace password_manager