module OpenGraphHelper
- def opengraph_tags(title = nil, og_image = nil)
+ require "addressable/uri"
+
+ def opengraph_tags(title, properties)
tags = {
"og:site_name" => t("layouts.project_name.title"),
- "og:title" => [title, t("layouts.project_name.title")].compact.join(" | "),
+ "og:title" => title || t("layouts.project_name.title"),
"og:type" => "website",
- "og:image" => og_image || image_url("osm_logo_256.png"),
"og:url" => url_for(:only_path => false),
- "og:description" => t("layouts.intro_text")
- }
+ "og:description" => properties["og:description"] || t("layouts.intro_text")
+ }.merge(
+ opengraph_image_properties(properties)
+ ).merge(
+ properties.slice("article:published_time")
+ )
safe_join(tags.map do |property, content|
tag.meta(:property => property, :content => content)
end, "\n")
end
+
+ private
+
+ def opengraph_image_properties(properties)
+ begin
+ if properties["og:image"]
+ image_properties = {}
+ image_properties["og:image"] = Addressable::URI.join(root_url, properties["og:image"]).normalize
+ image_properties["og:image:alt"] = properties["og:image:alt"] if properties["og:image:alt"]
+ return image_properties
+ end
+ rescue Addressable::URI::InvalidURIError
+ # return default image
+ end
+ {
+ "og:image" => image_url("osm_logo_256.png"),
+ "og:image:alt" => t("layouts.logo.alt_text")
+ }
+ end
end