Restructure & refactor codebase

internal/glance/widget-lobsters.go

@@ -0,0 +1,147 @@
+package glance
+
+import (
+	"context"
+	"html/template"
+	"net/http"
+	"strings"
+	"time"
+)
+
+type lobstersWidget struct {
+	widgetBase     `yaml:",inline"`
+	Posts          forumPostList `yaml:"-"`
+	InstanceURL    string        `yaml:"instance-url"`
+	CustomURL      string        `yaml:"custom-url"`
+	Limit          int           `yaml:"limit"`
+	CollapseAfter  int           `yaml:"collapse-after"`
+	SortBy         string        `yaml:"sort-by"`
+	Tags           []string      `yaml:"tags"`
+	ShowThumbnails bool          `yaml:"-"`
+}
+
+func (widget *lobstersWidget) initialize() error {
+	widget.withTitle("Lobsters").withCacheDuration(time.Hour)
+
+	if widget.InstanceURL == "" {
+		widget.withTitleURL("https://lobste.rs")
+	} else {
+		widget.withTitleURL(widget.InstanceURL)
+	}
+
+	if widget.SortBy == "" || (widget.SortBy != "hot" && widget.SortBy != "new") {
+		widget.SortBy = "hot"
+	}
+
+	if widget.Limit <= 0 {
+		widget.Limit = 15
+	}
+
+	if widget.CollapseAfter == 0 || widget.CollapseAfter < -1 {
+		widget.CollapseAfter = 5
+	}
+
+	return nil
+}
+
+func (widget *lobstersWidget) update(ctx context.Context) {
+	posts, err := fetchLobstersPosts(widget.CustomURL, widget.InstanceURL, widget.SortBy, widget.Tags)
+
+	if !widget.canContinueUpdateAfterHandlingErr(err) {
+		return
+	}
+
+	if widget.Limit < len(posts) {
+		posts = posts[:widget.Limit]
+	}
+
+	widget.Posts = posts
+}
+
+func (widget *lobstersWidget) Render() template.HTML {
+	return widget.renderTemplate(widget, forumPostsTemplate)
+}
+
+type lobstersPostResponseJson struct {
+	CreatedAt    string   `json:"created_at"`
+	Title        string   `json:"title"`
+	URL          string   `json:"url"`
+	Score        int      `json:"score"`
+	CommentCount int      `json:"comment_count"`
+	CommentsURL  string   `json:"comments_url"`
+	Tags         []string `json:"tags"`
+}
+
+type lobstersFeedResponseJson []lobstersPostResponseJson
+
+func fetchLobstersPostsFromFeed(feedUrl string) (forumPostList, error) {
+	request, err := http.NewRequest("GET", feedUrl, nil)
+
+	if err != nil {
+		return nil, err
+	}
+
+	feed, err := decodeJsonFromRequest[lobstersFeedResponseJson](defaultClient, request)
+
+	if err != nil {
+		return nil, err
+	}
+
+	posts := make(forumPostList, 0, len(feed))
+
+	for i := range feed {
+		createdAt, _ := time.Parse(time.RFC3339, feed[i].CreatedAt)
+
+		posts = append(posts, forumPost{
+			Title:           feed[i].Title,
+			DiscussionUrl:   feed[i].CommentsURL,
+			TargetUrl:       feed[i].URL,
+			TargetUrlDomain: extractDomainFromUrl(feed[i].URL),
+			CommentCount:    feed[i].CommentCount,
+			Score:           feed[i].Score,
+			TimePosted:      createdAt,
+			Tags:            feed[i].Tags,
+		})
+	}
+
+	if len(posts) == 0 {
+		return nil, errNoContent
+	}
+
+	return posts, nil
+}
+
+func fetchLobstersPosts(customURL string, instanceURL string, sortBy string, tags []string) (forumPostList, error) {
+	var feedUrl string
+
+	if customURL != "" {
+		feedUrl = customURL
+	} else {
+		if instanceURL != "" {
+			instanceURL = strings.TrimRight(instanceURL, "/") + "/"
+		} else {
+			instanceURL = "https://lobste.rs/"
+		}
+
+		if sortBy == "hot" {
+			sortBy = "hottest"
+		} else if sortBy == "new" {
+			sortBy = "newest"
+		}
+
+		if len(tags) == 0 {
+			feedUrl = instanceURL + sortBy + ".json"
+		} else {
+			tags := strings.Join(tags, ",")
+			feedUrl = instanceURL + "t/" + tags + ".json"
+		}
+	}
+
+	posts, err := fetchLobstersPostsFromFeed(feedUrl)
+
+	if err != nil {
+		return nil, err
+	}
+
+	return posts, nil
+}