From f06da1815748cbad110e817097c7bc14e32b1055 Mon Sep 17 00:00:00 2001
From: siddharth ravikumar <s@ricketyspace.net>
Date: Sat, 26 Nov 2022 07:49:26 -0500
Subject: feed: add `podcastUnmarshal`

---
 Makefile                            |  2 +-
 feed/feed.go                        | 35 +++++++++++++++++++++++++
 feed/feed_test.go                   | 51 +++++++++++++++++++++++++++++++++++++
 feed/testdata/pc-atp.xml            |  1 +
 feed/testdata/pc-daringfireball.xml |  1 +
 feed/testdata/pc-kara.xml           |  1 +
 feed/testdata/pc-scwpod.xml         |  1 +
 7 files changed, 91 insertions(+), 1 deletion(-)
 create mode 100644 feed/feed_test.go
 create mode 120000 feed/testdata/pc-atp.xml
 create mode 120000 feed/testdata/pc-daringfireball.xml
 create mode 120000 feed/testdata/pc-kara.xml
 create mode 120000 feed/testdata/pc-scwpod.xml

diff --git a/Makefile b/Makefile
index f77402e..66a2090 100644
--- a/Makefile
+++ b/Makefile
@@ -16,5 +16,5 @@ vet:
 	go vet ./...
 
 test:
-	go test -v ${MOD}/db ${MOD}/file ${MOD}/schema
+	go test ${MOD}/db ${MOD}/feed ${MOD}/file ${MOD}/schema
 .PHONY: test
diff --git a/feed/feed.go b/feed/feed.go
index 1223195..3a3fa30 100644
--- a/feed/feed.go
+++ b/feed/feed.go
@@ -297,3 +297,38 @@ func youtubeUnmarshal(bs []byte) ([]schema.Entry, error) {
 	}
 	return entries, nil
 }
+
+// Unmarshal a Podcast feed.
+func podcastUnmarshal(bs []byte) ([]schema.Entry, error) {
+	pcFeed := new(schema.PodcastFeed)
+	err := xml.Unmarshal(bs, pcFeed)
+	if err != nil {
+		return nil, err
+	}
+
+	// Get all entries.
+	entries := make([]schema.Entry, 0)
+	for _, e := range pcFeed.Entries {
+		layout := time.RFC1123Z
+		if e.Pub[len(e.Pub)-1:] == "T" {
+			// Textual time zone. like 'EDT'.
+			if e.Pub[6:7] == " " {
+				layout = "Mon, 2 Jan 2006 15:04:05 MST"
+			} else {
+				layout = time.RFC1123
+			}
+		}
+		t, err := time.Parse(layout, e.Pub)
+		if err != nil {
+			return nil, err
+		}
+		entry := schema.Entry{
+			Id:      e.Id,
+			Title:   e.Title,
+			PubTime: t,
+			Link:    e.Link.Url,
+		}
+		entries = append(entries, entry)
+	}
+	return entries, nil
+}
diff --git a/feed/feed_test.go b/feed/feed_test.go
new file mode 100644
index 0000000..8f566e6
--- /dev/null
+++ b/feed/feed_test.go
@@ -0,0 +1,51 @@
+// SPDX-License-Identifier: ISC
+// Copyright © 2022 siddharth <s@ricketyspace.net>
+
+package feed
+
+import (
+	"net/url"
+	"testing"
+
+	"ricketyspace.net/fern/file"
+)
+
+func TestPodcastUnmarshal(t *testing.T) {
+	testFeeds := []string{
+ 		"testdata/pc-atp.xml",
+ 		"testdata/pc-daringfireball.xml",
+ 		"testdata/pc-kara.xml",
+ 		"testdata/pc-scwpod.xml",
+	}
+	for _, feed := range testFeeds {
+		bs, err := file.ReadFile(feed)
+		if err != nil {
+			t.Errorf("read feed: %v", err)
+			return
+		}
+		entries, err := podcastUnmarshal(bs)
+		if err != nil {
+			t.Errorf("feed unmarshal: %v", err)
+			return
+		}
+		for _, entry := range entries {
+			if len(entry.Id) < 1 {
+				t.Errorf("entry id: %v", entry.Id)
+				return
+			}
+			if len(entry.Title) < 1 {
+				t.Errorf("entry title: %v", entry.Title)
+				return
+			}
+			if entry.PubTime.Unix() < 994702392 {
+				t.Errorf("entry time: %v", entry.PubTime)
+				return
+			}
+			_, err = url.Parse(entry.Link)
+			if err != nil {
+				t.Errorf("entry link: %s: %v", entry.Link, err)
+				return
+			}
+		}
+	}
+}
diff --git a/feed/testdata/pc-atp.xml b/feed/testdata/pc-atp.xml
new file mode 120000
index 0000000..e63b34f
--- /dev/null
+++ b/feed/testdata/pc-atp.xml
@@ -0,0 +1 @@
+../../schema/testdata/pc-atp.xml
\ No newline at end of file
diff --git a/feed/testdata/pc-daringfireball.xml b/feed/testdata/pc-daringfireball.xml
new file mode 120000
index 0000000..d5cba1e
--- /dev/null
+++ b/feed/testdata/pc-daringfireball.xml
@@ -0,0 +1 @@
+../../schema/testdata/pc-daringfireball.xml
\ No newline at end of file
diff --git a/feed/testdata/pc-kara.xml b/feed/testdata/pc-kara.xml
new file mode 120000
index 0000000..433fc3c
--- /dev/null
+++ b/feed/testdata/pc-kara.xml
@@ -0,0 +1 @@
+../../schema/testdata/pc-kara.xml
\ No newline at end of file
diff --git a/feed/testdata/pc-scwpod.xml b/feed/testdata/pc-scwpod.xml
new file mode 120000
index 0000000..d0c236e
--- /dev/null
+++ b/feed/testdata/pc-scwpod.xml
@@ -0,0 +1 @@
+../../schema/testdata/pc-scwpod.xml
\ No newline at end of file
-- 
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