|
| 1 | +package ap |
| 2 | + |
| 3 | +import ( |
| 4 | + "NewsChannel/news" |
| 5 | + "encoding/json" |
| 6 | + "errors" |
| 7 | + "fmt" |
| 8 | + "net/url" |
| 9 | + "regexp" |
| 10 | + "strings" |
| 11 | + |
| 12 | + "github.com/PuerkitoBio/goquery" |
| 13 | +) |
| 14 | + |
| 15 | +var BaseUrl = "https://apnews.com/graphql/delivery/ap/v1" |
| 16 | + |
| 17 | +func (a *AP) getArticles(path string, topic news.Topic) ([]news.Article, error) { |
| 18 | + parsedURL, err := url.Parse(BaseUrl) |
| 19 | + if err != nil { |
| 20 | + return nil, err |
| 21 | + } |
| 22 | + query := parsedURL.Query() |
| 23 | + query.Add("operationName", "ContentPageQuery") |
| 24 | + query.Add("variables", fmt.Sprintf("{\"path\":\"%s\"}", path)) |
| 25 | + query.Add("extensions", "{\"persistedQuery\":{\"version\":1,\"sha256Hash\":\"3bc305abbf62e9e632403a74cc86dc1cba51156d2313f09b3779efec51fc3acb\"}}") |
| 26 | + parsedURL.RawQuery = query.Encode() |
| 27 | + requestURL := parsedURL.String() |
| 28 | + |
| 29 | + data, err := news.HttpGet(requestURL) |
| 30 | + if err != nil { |
| 31 | + return nil, err |
| 32 | + } |
| 33 | + |
| 34 | + var categoryListing ContentPageQuery |
| 35 | + err = json.Unmarshal(data, &categoryListing) |
| 36 | + if err != nil { |
| 37 | + return nil, err |
| 38 | + } |
| 39 | + |
| 40 | + var articles []news.Article |
| 41 | + for _, item := range categoryListing.Data.Screen.Main { |
| 42 | + if item.TypeName != "ColumnContainer" { |
| 43 | + continue |
| 44 | + } |
| 45 | + |
| 46 | + for _, column := range item.Columns { |
| 47 | + if column.TypeName != "PageListModule" { |
| 48 | + continue |
| 49 | + } |
| 50 | + |
| 51 | + for _, story := range column.Items { |
| 52 | + if story.TypeName != "PagePromo" { |
| 53 | + continue |
| 54 | + } |
| 55 | + |
| 56 | + title := news.SanitizeText(story.Title) |
| 57 | + // Check for duplicates |
| 58 | + if news.IsDuplicateArticle(a.oldArticleTitles, title) { |
| 59 | + continue |
| 60 | + } |
| 61 | + a.oldArticleTitles = append(a.oldArticleTitles, title) |
| 62 | + |
| 63 | + content, location, thumbnail, err := a.getFullArticle(story.Path) |
| 64 | + if err != nil { |
| 65 | + return nil, err |
| 66 | + } |
| 67 | + |
| 68 | + if content == "" { |
| 69 | + continue |
| 70 | + } |
| 71 | + |
| 72 | + article := news.Article{ |
| 73 | + Title: title, |
| 74 | + Content: &content, |
| 75 | + Topic: topic, |
| 76 | + Location: location, |
| 77 | + Thumbnail: thumbnail, |
| 78 | + } |
| 79 | + |
| 80 | + articles = append(articles, article) |
| 81 | + return articles, nil |
| 82 | + } |
| 83 | + } |
| 84 | + } |
| 85 | + |
| 86 | + return articles, nil |
| 87 | +} |
| 88 | + |
| 89 | +func (a *AP) getFullArticle(path string) (string, *news.Location, *news.Thumbnail, error) { |
| 90 | + if path == "" { |
| 91 | + return "", nil, nil, errors.New("empty path") |
| 92 | + } |
| 93 | + |
| 94 | + parsedURL, err := url.Parse(BaseUrl) |
| 95 | + if err != nil { |
| 96 | + return "", nil, nil, err |
| 97 | + } |
| 98 | + query := parsedURL.Query() |
| 99 | + query.Add("operationName", "StoryQuery") |
| 100 | + query.Add("variables", fmt.Sprintf("{\"path\":\"%s\"}", path)) |
| 101 | + query.Add("extensions", "{\"persistedQuery\":{\"version\":1,\"sha256Hash\":\"d61508dd5f8c1d84fa6d49338e321266f56b4538c07c233564bb11300287d69c\"}}") |
| 102 | + parsedURL.RawQuery = query.Encode() |
| 103 | + requestURL := parsedURL.String() |
| 104 | + |
| 105 | + data, err := news.HttpGet(requestURL) |
| 106 | + if err != nil { |
| 107 | + return "", nil, nil, err |
| 108 | + } |
| 109 | + |
| 110 | + var articleResponse StoryPageQuery |
| 111 | + err = json.Unmarshal(data, &articleResponse) |
| 112 | + if err != nil { |
| 113 | + return "", nil, nil, err |
| 114 | + } |
| 115 | + |
| 116 | + // First, let's reconstruct the HTML that has been stored in the most horrific |
| 117 | + // format I've ever witnessed. |
| 118 | + var html strings.Builder |
| 119 | + for _, part := range articleResponse.Data.StoryPage.StoryBody { |
| 120 | + switch part.TypeName { |
| 121 | + case "HtmlString": |
| 122 | + html.WriteString(part.HTML) |
| 123 | + case "LinkEnhancement": |
| 124 | + for _, bodyPart := range part.Body { |
| 125 | + html.WriteString(bodyPart) |
| 126 | + } |
| 127 | + default: |
| 128 | + // We do not want other parts (video players, ads, etc) |
| 129 | + continue |
| 130 | + } |
| 131 | + } |
| 132 | + |
| 133 | + // Convert the now usable HTML to a string for use in the channel, and |
| 134 | + // extract the location from the first paragraph. |
| 135 | + content, locationString, err := a.extractArticleBody(html.String()) |
| 136 | + if err != nil { |
| 137 | + return "", nil, nil, err |
| 138 | + } |
| 139 | + if len(content) == 0 { |
| 140 | + return "", nil, nil, nil |
| 141 | + } |
| 142 | + |
| 143 | + var location *news.Location |
| 144 | + if locationString != nil { |
| 145 | + location = news.GetLocationForExtractedLocation([]string{*locationString}, "en") |
| 146 | + } |
| 147 | + |
| 148 | + thumbnail := a.downloadThumbnail(articleResponse) |
| 149 | + |
| 150 | + return strings.TrimSpace(content), location, thumbnail, nil |
| 151 | +} |
| 152 | + |
| 153 | +func (a *AP) extractArticleBody(html string) (string, *string, error) { |
| 154 | + doc, err := goquery.NewDocumentFromReader(strings.NewReader(html)) |
| 155 | + if err != nil { |
| 156 | + return "", nil, err |
| 157 | + } |
| 158 | + |
| 159 | + var contentSlice []string |
| 160 | + |
| 161 | + doc.Find("p").EachWithBreak(func(i int, elem *goquery.Selection) bool { |
| 162 | + text := strings.TrimSpace(elem.Text()) |
| 163 | + if text == "___" { |
| 164 | + // We have reached the article footer |
| 165 | + return false |
| 166 | + } |
| 167 | + |
| 168 | + if text != "" { |
| 169 | + contentSlice = append(contentSlice, text) |
| 170 | + } |
| 171 | + return true |
| 172 | + }) |
| 173 | + |
| 174 | + if len(contentSlice) == 0 { |
| 175 | + return "", nil, nil |
| 176 | + } |
| 177 | + |
| 178 | + var content string |
| 179 | + for _, paragraph := range contentSlice { |
| 180 | + content += news.SanitizeText(paragraph) |
| 181 | + content += "\n\n" |
| 182 | + } |
| 183 | + |
| 184 | + // Get the location |
| 185 | + locationRegex := regexp.MustCompile(`(.*?) \(AP\) — `) |
| 186 | + location := locationRegex.FindStringSubmatch(contentSlice[0]) |
| 187 | + if len(location) > 1 && len(location[1]) > 0 { |
| 188 | + return content, &location[1], nil |
| 189 | + } |
| 190 | + |
| 191 | + return content, nil, nil |
| 192 | +} |
| 193 | + |
| 194 | +func (a *AP) downloadThumbnail(articleResponse StoryPageQuery) *news.Thumbnail { |
| 195 | + var imageURL string |
| 196 | + var caption string |
| 197 | + |
| 198 | + if len(articleResponse.Data.StoryPage.BlendedGallery) > 0 { |
| 199 | + caption, imageURL = a.extractGalleryImage(articleResponse.Data.StoryPage.BlendedGallery) |
| 200 | + } else { |
| 201 | + caption, imageURL = a.extractLeadImage(articleResponse.Data.StoryPage.StoryLead) |
| 202 | + } |
| 203 | + |
| 204 | + var imageData []byte |
| 205 | + if imageURL == "" { |
| 206 | + return nil |
| 207 | + } |
| 208 | + |
| 209 | + imageData, err := news.HttpGet(imageURL) |
| 210 | + if err != nil || len(imageData) == 0 { |
| 211 | + return nil |
| 212 | + } |
| 213 | + |
| 214 | + return &news.Thumbnail{ |
| 215 | + Image: news.ConvertImage(imageData), |
| 216 | + Caption: news.SanitizeText(caption), |
| 217 | + } |
| 218 | +} |
| 219 | + |
| 220 | +func (a *AP) extractGalleryImage(gallery []BlendedGalleryElement) (caption string, imageURL string) { |
| 221 | + for _, item := range gallery { |
| 222 | + if item.TypeName != "Carousel" { |
| 223 | + continue |
| 224 | + } |
| 225 | + |
| 226 | + for _, slide := range item.Slides { |
| 227 | + if slide.TypeName != "GallerySlide" { |
| 228 | + continue |
| 229 | + } |
| 230 | + |
| 231 | + for _, captionString := range slide.Caption { |
| 232 | + if len(captionString) > 0 { |
| 233 | + caption = captionString |
| 234 | + break |
| 235 | + } |
| 236 | + } |
| 237 | + |
| 238 | + for _, media := range slide.Media { |
| 239 | + if media.TypeName != "Image" { |
| 240 | + continue |
| 241 | + } |
| 242 | + imageURL = a.extractURLFromMap(media.Image) |
| 243 | + return |
| 244 | + } |
| 245 | + } |
| 246 | + } |
| 247 | + return |
| 248 | +} |
| 249 | + |
| 250 | +func (a *AP) extractLeadImage(storyLead []StoryLeadElement) (caption string, imageURL string) { |
| 251 | + for _, item := range storyLead { |
| 252 | + if item.TypeName != "Figure" { |
| 253 | + continue |
| 254 | + } |
| 255 | + |
| 256 | + caption = item.AltText |
| 257 | + imageURL = a.extractURLFromMap(item.Image) |
| 258 | + return |
| 259 | + } |
| 260 | + |
| 261 | + return |
| 262 | +} |
| 263 | + |
| 264 | +func (a *AP) extractURLFromMap(imageMap ImageMap) string { |
| 265 | + if imageMap.TypeName != "Map" { |
| 266 | + return "" |
| 267 | + } |
| 268 | + for _, mapEntry := range imageMap.Entries { |
| 269 | + if mapEntry.TypeName != "MapEntry" || mapEntry.Key != "src" { |
| 270 | + continue |
| 271 | + } |
| 272 | + return mapEntry.Value |
| 273 | + } |
| 274 | + return "" |
| 275 | +} |
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