From 3a667a3809e9d63051d82648877f91a7e6f6cf41 Mon Sep 17 00:00:00 2001
From: Nazar Kanaev <nkanaev@live.com>
Date: Fri, 19 Mar 2021 21:50:07 +0000
Subject: [PATCH] add date parser

---
 src/feed/date.go   | 217 +++++++++++++++++++++++++++++++++++++++++++++
 src/feed/json.go   |   4 +-
 src/feed/models.go |   2 +-
 3 files changed, 220 insertions(+), 3 deletions(-)
 create mode 100644 src/feed/date.go

diff --git a/src/feed/date.go b/src/feed/date.go
new file mode 100644
index 0000000..1f108a5
--- /dev/null
+++ b/src/feed/date.go
@@ -0,0 +1,217 @@
+package feed
+
+import (
+	"fmt"
+	"time"
+)
+
+// dateformats taken from somewhere
+// which where originally 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, 02 Jan 2006 15:04:05 MST -07:00",
+	"Mon, January 2, 2006, 3:04 PM MST",
+	"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 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",
+	"Mon, 02/01/2006",
+	"Monday, 2. January 2006 - 15:04",
+	"Monday 02 January 2006",
+	"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",
+	"Monday, January 02, 2006 - 3:04pm",
+	"Monday, January 2, 2006 - 3:04pm",
+	"Mon, 01/02/2006 - 15:04",
+	"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",
+	"nilMon, 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, 02 Jan 2006, 15:04",
+	"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 MST",
+	"Mon, 02 Jan 2006 15:04:05 MST",
+	"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",
+	"Mon, 02 Jan 2006 3:04 PM MST",
+	"Mon Jan 02 2006 15:04:05 MST",
+	"Mon, 01 02 2006 15:04:05 -0700",
+	"Mon, 2th Jan 2006 15:05:05 MST",
+	"Jan. 2, 2006, 3:04 a.m.",
+	"fri, 02 jan 2006 15:04:05 -0700",
+	"January 02 2006 03:04:05 PM",
+	"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 Jan 2006 15:04 MST",
+	"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",
+	"2006-01-02T15:04:05-07:00Z",
+	"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",
+	"2006-01-02T15:04",
+	"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",
+	"Jan. 2006",
+	"Jan. 2, 2006, 03:04 p.m.",
+	"2006-01-02 15:04:05 -07:00",
+	"2 January, 2006",
+}
+
+func dateParse(line string) (time.Time, error) {
+	for _, layout := range dateFormats {
+		if t, err := time.Parse(layout, line); err == nil {
+			return t, nil
+		}
+	}
+	return time.Time{}, fmt.Errorf("failed to parse date: %s", line)
+}
diff --git a/src/feed/json.go b/src/feed/json.go
index 7ccd08a..1fbb9a9 100644
--- a/src/feed/json.go
+++ b/src/feed/json.go
@@ -49,14 +49,14 @@ func (f *jsonFeed) convert(base string) *Feed {
 		FeedURL: f.FeedURL,
 	}
 	for _, item := range f.Items {
-		//date := item.DatePublished
+		date, _ := dateParse(first(item.DatePublished, item.DateModified))
 		content := first(item.HTML, item.Text, item.Summary)
 		imageUrl := ""
 		podcastUrl := ""
 	
 		feed.Items = append(feed.Items, Item{
 			GUID: item.ID,
-			Date: nil,
+			Date: date,
 			URL:  item.URL,
 			Title: item.Title,
 			Content: content,
diff --git a/src/feed/models.go b/src/feed/models.go
index 1a70167..5a40f90 100644
--- a/src/feed/models.go
+++ b/src/feed/models.go
@@ -11,7 +11,7 @@ type Feed struct {
 
 type Item struct {
 	GUID string
-	Date *time.Time
+	Date time.Time
 	URL  string
 	Title string