aboutsummaryrefslogtreecommitdiffstats
path: root/models/feed/feed.go
blob: 70b939a2e93289afff8dce08981948c48c06798f (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
package feed

import (
	"adammathes.com/neko/models"
	"github.com/PuerkitoBio/goquery"
	"log"
	"net/http"
)

type Feed struct {
	Id    int64  `json:"_id"`
	Url   string `json:"url"`
	Title string `json:"title"`
	// TODO: last_updated scan
}

func NewFeed(url string) error {
	url = ResolveFeedURL(url)
	stmt, err := models.DB.Prepare("INSERT INTO feed(url) VALUES(?)")
	if err != nil {
		return err
	}
	_, err = stmt.Exec(url)
	if err != nil {
		return err
	}
	return nil
}

func All() ([]*Feed, error) {
	return filter(" ORDER BY lower(TITLE) asc")
}

func filter(where string) ([]*Feed, error) {
	// todo: add back in title
	rows, err := models.DB.Query(`SELECT id, url, title
                                  FROM feed ` + where)
	if err != nil {
		return nil, err
	}
	defer rows.Close()

	feeds := make([]*Feed, 0)
	for rows.Next() {
		f := new(Feed)
		err := rows.Scan(&f.Id, &f.Url, &f.Title)
		if err != nil {
			return nil, err
		}
		feeds = append(feeds, f)
	}
	if err = rows.Err(); err != nil {
		return nil, err
	}
	return feeds, nil
}

func (f *Feed) Update() {
	if len(f.Title) == 0 {
		return
	}

	if f.Id == 0 {
		return
	}

	if len(f.Url) == 0 {
		return
	}

	models.DB.Query(`UPDATE feed 
                     SET title=?, url=?
                     WHERE id=?`, f.Title, f.Url, f.Id)
}

func (f *Feed) Delete() {
	log.Println("lets delete some shiteeee")
	_, err := models.DB.Exec(`DELETE FROM feed 
                                  WHERE id=?`, f.Id)
	if err != nil {
		log.Println(err)
	}
}

func (f *Feed) ByUrl(url string) error {
	err := models.DB.QueryRow(`SELECT id, url, title 
                               FROM feed
                               WHERE url = ?`, url).Scan(&f.Id, &f.Url, &f.Title)
	if err != nil {
		return err
	}
	return nil
}

func (f *Feed) Create() error {
	res, err := models.DB.Exec(`INSERT INTO feed(url, title)
                                VALUES(?, ?)`, f.Url, f.Title)
	if err != nil {
		return err
	}

	id, _ := res.LastInsertId()
	f.Id = id

	return nil
}

// Given a string `url`, return to the best guess of the feed
func ResolveFeedURL(url string) string {
	resp, err := http.Get(url)
	if err != nil {
		// handle errors better
		return url
	}

	// Check content-type header first
	// if it's feed-ish, just use it
	contentType := resp.Header["Content-Type"][0]
	switch contentType {

	case "text/xml":
		return url
	case "text/rss+xml":
		return url
	case "application/rss+xml":
		return url
	case "application/atom+xml":
		return url
	}

	// goquery is probably overkill here
	doc, err := goquery.NewDocument(url)
	var f string

	// loop over each link element, return first one that is of type rss or atom
	f = ""
	doc.Find("link").Each(func(i int, s *goquery.Selection) {

		if f != "" {
			// we're done
			return
		}

		t := s.AttrOr("type", "")
		h := s.AttrOr("href", "")
		if t == "application/atom+xml" {
			f = h
		}
		if t == "application/rss+xml" {
			f = h
		}
	})

	// if we have nothing, just return the original url
	if f == "" {
		f = url
	}

	// if we don't start with http[s] its probably relative
	if f[0] != 'h' {
		f = url + f
	}
	return f
}