| 1 | package main
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| 2 |
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| 3 | import (
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| 4 | "context"
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| 5 |
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| 6 | "github.com/mmcdole/gofeed"
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| 7 | )
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| 8 |
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| 9 | var _ Source = &RssFeed{}
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| 10 |
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| 11 | type RssFeed struct {
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| 12 | name string
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| 13 | url string
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| 14 | content string
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| 15 | language Language
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| 16 | feed *gofeed.Feed
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| 17 | }
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| 18 |
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| 19 | func (r *RssFeed) Name() string {
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| 20 | return r.name
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| 21 | }
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| 22 |
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| 23 | func (r *RssFeed) Language() Language {
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| 24 | return r.language
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| 25 | }
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| 26 |
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| 27 | func (r *RssFeed) getFeed(ctx context.Context) error {
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| 28 | fp := gofeed.NewParser()
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| 29 | feed, err := fp.ParseURLWithContext(r.url, ctx)
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| 30 | if err != nil {
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| 31 | return err
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| 32 | }
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| 33 | r.feed = feed
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| 34 | return nil
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| 35 | }
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| 36 |
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| 37 | func (r RssFeed) Len(ctx context.Context) (int, error) {
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| 38 | if r.feed == nil {
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| 39 | if err := r.getFeed(ctx); err != nil {
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| 40 | return -1, err
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| 41 | }
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| 42 | }
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| 43 | return r.feed.Len(), nil
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| 44 | }
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| 45 |
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| 46 | func (r *RssFeed) Get(ctx context.Context, i int) (*Article, error) {
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| 47 | if r.feed == nil {
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| 48 | if err := r.getFeed(ctx); err != nil {
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| 49 | return nil, err
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| 50 | }
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| 51 | }
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| 52 | item := r.feed.Items[i]
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| 53 | textOnly := extractText(item.Content)
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| 54 | return &Article{raw: textOnly}, nil
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| 55 | }
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