Initial commit

internal/matrix/post.go

@@ -0,0 +1,62 @@
+package matrix
+
+import (
+	"fmt"
+	"html"
+	"strings"
+)
+
+// PostableStory contains the data needed to format and send a story.
+type PostableStory struct {
+	ImageURL   string
+	Headline   string
+	ArticleURL string
+	Lede       string
+	Source     string
+	Channel    string
+	Platforms  []string
+}
+
+// formatPost returns plain text and HTML bodies for a Matrix message.
+func formatPost(s *PostableStory) (plain, htmlBody string) {
+	// Plain text body
+	var plainParts []string
+	plainParts = append(plainParts, fmt.Sprintf("**%s** \u2192 %s", s.Headline, s.ArticleURL))
+	if s.Lede != "" {
+		plainParts = append(plainParts, s.Lede)
+	}
+	plainParts = append(plainParts, formatSourceTag(s.Source, s.Platforms, false))
+	plain = strings.Join(plainParts, "\n")
+
+	// HTML body
+	var htmlParts []string
+	htmlParts = append(htmlParts, fmt.Sprintf(
+		`<strong><a href="%s">%s</a></strong>`,
+		html.EscapeString(s.ArticleURL),
+		html.EscapeString(s.Headline),
+	))
+	if s.Lede != "" {
+		htmlParts = append(htmlParts, html.EscapeString(s.Lede))
+	}
+	htmlParts = append(htmlParts, formatSourceTag(s.Source, s.Platforms, true))
+	htmlBody = strings.Join(htmlParts, "<br/>")
+
+	return plain, htmlBody
+}
+
+// formatSourceTag builds the source + platform tags line.
+func formatSourceTag(source string, platforms []string, isHTML bool) string {
+	if isHTML {
+		parts := []string{fmt.Sprintf("<code>%s</code>", html.EscapeString(strings.ToLower(source)))}
+		for _, p := range platforms {
+			parts = append(parts, fmt.Sprintf("<code>%s</code>", html.EscapeString(p)))
+		}
+		return strings.Join(parts, " \u00b7 ")
+	}
+
+	parts := []string{fmt.Sprintf("`%s`", strings.ToLower(source))}
+	for _, p := range platforms {
+		parts = append(parts, fmt.Sprintf("`%s`", p))
+	}
+	return strings.Join(parts, " \u00b7 ")
+}