Move feed parsers packages in reader package

1 files changed, 203 insertions, 0 deletions

diff --git a/reader/date/parser.go b/reader/date/parser.go
new file mode 100644
index 0000000..e573ff8
--- /dev/null
+++ b/reader/date/parser.go
@@ -0,0 +1,203 @@
+// Copyright 2017 Frédéric Guillot. All rights reserved.
+// Use of this source code is governed by the Apache 2.0
+// license that can be found in the LICENSE file.
+
+package date
+
+import (
+	"fmt"
+	"strings"
+	"time"
+)
+
+// DateFormats taken from github.com/mjibson/goread
+var dateFormats = []string{
+	time.RFC822,  // RSS
+	time.RFC822Z, // RSS
+	time.RFC3339, // Atom
+	time.UnixDate,
+	time.RubyDate,
+	time.RFC850,
+	time.RFC1123Z,
+	time.RFC1123,
+	time.ANSIC,
+	"Mon, January 2 2006 15:04:05 -0700",
+	"Mon, January 02, 2006, 15:04:05 MST",
+	"Mon, January 02, 2006 15:04:05 MST",
+	"Mon, Jan 2, 2006 15:04 MST",
+	"Mon, Jan 2 2006 15:04 MST",
+	"Mon, Jan 2, 2006 15:04:05 MST",
+	"Mon, Jan 2 2006 15:04:05 -700",
+	"Mon, Jan 2 2006 15:04:05 -0700",
+	"Mon Jan 2 15:04 2006",
+	"Mon Jan 2 15:04:05 2006 MST",
+	"Mon Jan 02, 2006 3:04 pm",
+	"Mon, Jan 02,2006 15:04:05 MST",
+	"Mon Jan 02 2006 15:04:05 -0700",
+	"Monday, January 2, 2006 15:04:05 MST",
+	"Monday, January 2, 2006 03:04 PM",
+	"Monday, January 2, 2006",
+	"Monday, January 02, 2006",
+	"Monday, 2 January 2006 15:04:05 MST",
+	"Monday, 2 January 2006 15:04:05 -0700",
+	"Monday, 2 Jan 2006 15:04:05 MST",
+	"Monday, 2 Jan 2006 15:04:05 -0700",
+	"Monday, 02 January 2006 15:04:05 MST",
+	"Monday, 02 January 2006 15:04:05 -0700",
+	"Monday, 02 January 2006 15:04:05",
+	"Mon, 2 January 2006 15:04 MST",
+	"Mon, 2 January 2006, 15:04 -0700",
+	"Mon, 2 January 2006, 15:04:05 MST",
+	"Mon, 2 January 2006 15:04:05 MST",
+	"Mon, 2 January 2006 15:04:05 -0700",
+	"Mon, 2 January 2006",
+	"Mon, 2 Jan 2006 3:04:05 PM -0700",
+	"Mon, 2 Jan 2006 15:4:5 MST",
+	"Mon, 2 Jan 2006 15:4:5 -0700 GMT",
+	"Mon, 2, Jan 2006 15:4",
+	"Mon, 2 Jan 2006 15:04 MST",
+	"Mon, 2 Jan 2006, 15:04 -0700",
+	"Mon, 2 Jan 2006 15:04 -0700",
+	"Mon, 2 Jan 2006 15:04:05 UT",
+	"Mon, 2 Jan 2006 15:04:05MST",
+	"Mon, 2 Jan 2006 15:04:05 MST",
+	"Mon 2 Jan 2006 15:04:05 MST",
+	"mon,2 Jan 2006 15:04:05 MST",
+	"Mon, 2 Jan 2006 15:04:05 -0700 MST",
+	"Mon, 2 Jan 2006 15:04:05-0700",
+	"Mon, 2 Jan 2006 15:04:05 -0700",
+	"Mon, 2 Jan 2006 15:04:05",
+	"Mon, 2 Jan 2006 15:04",
+	"Mon,2 Jan 2006",
+	"Mon, 2 Jan 2006",
+	"Mon, 2 Jan 15:04:05 MST",
+	"Mon, 2 Jan 06 15:04:05 MST",
+	"Mon, 2 Jan 06 15:04:05 -0700",
+	"Mon, 2006-01-02 15:04",
+	"Mon,02 January 2006 14:04:05 MST",
+	"Mon, 02 January 2006",
+	"Mon, 02 Jan 2006 3:04:05 PM MST",
+	"Mon, 02 Jan 2006 15 -0700",
+	"Mon,02 Jan 2006 15:04 MST",
+	"Mon, 02 Jan 2006 15:04 MST",
+	"Mon, 02 Jan 2006 15:04 -0700",
+	"Mon, 02 Jan 2006 15:04:05 Z",
+	"Mon, 02 Jan 2006 15:04:05 UT",
+	"Mon, 02 Jan 2006 15:04:05 MST-07:00",
+	"Mon, 02 Jan 2006 15:04:05 MST -0700",
+	"Mon, 02 Jan 2006, 15:04:05 MST",
+	"Mon, 02 Jan 2006 15:04:05MST",
+	"Mon, 02 Jan 2006 15:04:05 MST",
+	"Mon , 02 Jan 2006 15:04:05 MST",
+	"Mon, 02 Jan 2006 15:04:05 GMT-0700",
+	"Mon,02 Jan 2006 15:04:05 -0700",
+	"Mon, 02 Jan 2006 15:04:05 -0700",
+	"Mon, 02 Jan 2006 15:04:05 -07:00",
+	"Mon, 02 Jan 2006 15:04:05 --0700",
+	"Mon 02 Jan 2006 15:04:05 -0700",
+	"Mon, 02 Jan 2006 15:04:05 -07",
+	"Mon, 02 Jan 2006 15:04:05 00",
+	"Mon, 02 Jan 2006 15:04:05",
+	"Mon, 02 Jan 2006",
+	"Mon, 02 Jan 06 15:04:05 MST",
+	"January 2, 2006 3:04 PM",
+	"January 2, 2006, 3:04 p.m.",
+	"January 2, 2006 15:04:05 MST",
+	"January 2, 2006 15:04:05",
+	"January 2, 2006 03:04 PM",
+	"January 2, 2006",
+	"January 02, 2006 15:04:05 MST",
+	"January 02, 2006 15:04",
+	"January 02, 2006 03:04 PM",
+	"January 02, 2006",
+	"Jan 2, 2006 3:04:05 PM MST",
+	"Jan 2, 2006 3:04:05 PM",
+	"Jan 2, 2006 15:04:05 MST",
+	"Jan 2, 2006",
+	"Jan 02 2006 03:04:05PM",
+	"Jan 02, 2006",
+	"6/1/2 15:04",
+	"6-1-2 15:04",
+	"2 January 2006 15:04:05 MST",
+	"2 January 2006 15:04:05 -0700",
+	"2 January 2006",
+	"2 Jan 2006 15:04:05 Z",
+	"2 Jan 2006 15:04:05 MST",
+	"2 Jan 2006 15:04:05 -0700",
+	"2 Jan 2006",
+	"2.1.2006 15:04:05",
+	"2/1/2006",
+	"2-1-2006",
+	"2006 January 02",
+	"2006-1-2T15:04:05Z",
+	"2006-1-2 15:04:05",
+	"2006-1-2",
+	"2006-1-02T15:04:05Z",
+	"2006-01-02T15:04Z",
+	"2006-01-02T15:04-07:00",
+	"2006-01-02T15:04:05Z",
+	"2006-01-02T15:04:05-07:00:00",
+	"2006-01-02T15:04:05:-0700",
+	"2006-01-02T15:04:05-0700",
+	"2006-01-02T15:04:05-07:00",
+	"2006-01-02T15:04:05 -0700",
+	"2006-01-02T15:04:05:00",
+	"2006-01-02T15:04:05",
+	"2006-01-02 at 15:04:05",
+	"2006-01-02 15:04:05Z",
+	"2006-01-02 15:04:05 MST",
+	"2006-01-02 15:04:05-0700",
+	"2006-01-02 15:04:05-07:00",
+	"2006-01-02 15:04:05 -0700",
+	"2006-01-02 15:04",
+	"2006-01-02 00:00:00.0 15:04:05.0 -0700",
+	"2006/01/02",
+	"2006-01-02",
+	"15:04 02.01.2006 -0700",
+	"1/2/2006 3:04 PM MST",
+	"1/2/2006 3:04:05 PM MST",
+	"1/2/2006 3:04:05 PM",
+	"1/2/2006 15:04:05 MST",
+	"1/2/2006",
+	"06/1/2 15:04",
+	"06-1-2 15:04",
+	"02 Monday, Jan 2006 15:04",
+	"02 Jan 2006 15:04 MST",
+	"02 Jan 2006 15:04:05 UT",
+	"02 Jan 2006 15:04:05 MST",
+	"02 Jan 2006 15:04:05 -0700",
+	"02 Jan 2006 15:04:05",
+	"02 Jan 2006",
+	"02/01/2006 15:04 MST",
+	"02-01-2006 15:04:05 MST",
+	"02.01.2006 15:04:05",
+	"02/01/2006 15:04:05",
+	"02.01.2006 15:04",
+	"02/01/2006 - 15:04",
+	"02.01.2006 -0700",
+	"02/01/2006",
+	"02-01-2006",
+	"01/02/2006 3:04 PM",
+	"01/02/2006 15:04:05 MST",
+	"01/02/2006 - 15:04",
+	"01/02/2006",
+	"01-02-2006",
+}
+
+// Parse parses a given date string using a large
+// list of commonly found feed date formats.
+func Parse(ds string) (t time.Time, err error) {
+	d := strings.TrimSpace(ds)
+	if d == "" {
+		return t, fmt.Errorf("Date string is empty")
+	}
+
+	for _, f := range dateFormats {
+		if t, err = time.Parse(f, d); err == nil {
+			return
+		}
+	}
+
+	err = fmt.Errorf("Failed to parse date: %s", ds)
+	return
+}