Prepares release

* Adds Generator
* Corrects README

README.md

@@ -9,13 +9,12 @@
 ![GitHub code size in bytes](https://img.shields.io/github/languages/code-size/jlengrand/OpenGraphKt)
 
 
-[OpenGraphKt](https://github.com/jlengrand/OpenGraphKt) is a minimalist Kotlin library to work with the [Open Graph tags](https://ogp.me/) protocol. 
+[OpenGraphKt](https://github.com/jlengrand/OpenGraphKt) is a minimalist Kotlin multiplatform library to work with the [Open Graph tags](https://ogp.me/) protocol. 
 OpenGraphKt is a tiny wrapper on top of JSoup.
 
 ## Current status 
 
 * Library can extract OpenGraph tags from HTML via a `URL`, `String` or `File` input.
-* Current implementation is JVM only, due to the `JSoup` dependency.
 * Protocol implementation is complete for `og:` tags, but types aren't fully correct (most types currently are `String`).
 * Library should be considered in pre-alpha, use this in production at your own risks :).
 
@@ -28,7 +27,7 @@ In short :
 * Add dependency to your Maven / Gradle file. For example : 
 
 ```bash
-    implementation("fr.lengrand:opengraphkt:0.0.2")
+    implementation("fr.lengrand:opengraphkt:0.1.0")
 ```
 
 * Enjoy: 
@@ -44,11 +43,6 @@ println("Is valid: ${openGraphDataDoc.isValid()}")
 // Is valid: true
 ```
 
-
-## Dependencies
-
-- [JSoup](https://jsoup.org/)
-
 ## Author
 
 * [Julien Lengrand-Lambert](https://github.com/jlengrand)

opengraphkt/build.gradle.kts

@@ -7,7 +7,7 @@ plugins {
 }
 
 group = "fr.lengrand"
-version = "0.1.1-SNAPSHOT"
+version = "0.1.1"
 
 repositories {
     mavenCentral()

opengraphkt/src/main/kotlin/fr/lengrand/opengraphkt/Generator.kt

@@ -0,0 +1,337 @@
+package fr.lengrand.opengraphkt
+
+import java.time.OffsetDateTime
+
+/**
+ * A generator for Open Graph protocol HTML meta tags.
+ * 
+ * This class converts an OpenGraph Data object into HTML meta tags according to the Open Graph protocol specification.
+ * It can be used to generate the appropriate meta tags for embedding in HTML documents.
+ * 
+ * @see <a href="https://ogp.me/">Open Graph Protocol</a>
+ */
+class Generator {
+
+    /**
+     * Generates HTML meta tags from an OpenGraph Data object.
+     * 
+     * @param data The OpenGraph Data object to convert to HTML meta tags
+     * @return A string containing the HTML meta tags
+     */
+    fun generate(data: Data): String {
+        val tags = mutableListOf<String>()
+
+        // Add basic metadata tags
+        addBasicMetaTags(data, tags)
+
+        // Add image tags
+        addImageTags(data.images, tags)
+
+        // Add video tags
+        addVideoTags(data.videos, tags)
+
+        // Add audio tags
+        addAudioTags(data.audios, tags)
+
+        // Add type-specific tags
+        when (data.getType()) {
+            Type.ARTICLE -> addArticleTags(data.article, tags)
+            Type.PROFILE -> addProfileTags(data.profile, tags)
+            Type.BOOK -> addBookTags(data.book, tags)
+            Type.MUSIC_SONG -> addMusicSongTags(data.musicSong, tags)
+            Type.MUSIC_ALBUM -> addMusicAlbumTags(data.musicAlbum, tags)
+            Type.MUSIC_PLAYLIST -> addMusicPlaylistTags(data.musicPlaylist, tags)
+            Type.MUSIC_RADIO_STATION -> addMusicRadioStationTags(data.musicRadioStation, tags)
+            Type.VIDEO_MOVIE, Type.VIDEO_TV_SHOW, Type.VIDEO_OTHER -> addVideoMovieTags(data.videoMovie, tags)
+            Type.VIDEO_EPISODE -> addVideoEpisodeTags(data.videoEpisode, tags)
+            else -> { /* No additional tags for other types */ }
+        }
+
+        return tags.joinToString("\n")
+    }
+
+    /**
+     * Adds basic Open Graph meta tags to the list.
+     * 
+     * @param data The OpenGraph Data object
+     * @param tags The list to add the tags to
+     */
+    private fun addBasicMetaTags(data: Data, tags: MutableList<String>) {
+        // Required properties
+        data.title?.let { tags.add(createMetaTag("og:title", it)) }
+        data.type?.let { tags.add(createMetaTag("og:type", it)) }
+        data.url?.let { tags.add(createMetaTag("og:url", it.toString())) }
+
+        // Optional properties
+        data.description?.let { tags.add(createMetaTag("og:description", it)) }
+        data.siteName?.let { tags.add(createMetaTag("og:site_name", it)) }
+        data.determiner?.let { tags.add(createMetaTag("og:determiner", it)) }
+        data.locale?.let { tags.add(createMetaTag("og:locale", it)) }
+
+        // Locale alternates
+        data.localeAlternate.forEach { locale ->
+            tags.add(createMetaTag("og:locale:alternate", locale))
+        }
+    }
+
+    /**
+     * Adds image meta tags to the list.
+     * 
+     * @param images The list of Image objects
+     * @param tags The list to add the tags to
+     */
+    private fun addImageTags(images: List<Image>, tags: MutableList<String>) {
+        images.forEach { image ->
+            image.url?.let { tags.add(createMetaTag("og:image", it)) }
+            image.secureUrl?.let { tags.add(createMetaTag("og:image:secure_url", it)) }
+            image.type?.let { tags.add(createMetaTag("og:image:type", it)) }
+            image.width?.let { tags.add(createMetaTag("og:image:width", it.toString())) }
+            image.height?.let { tags.add(createMetaTag("og:image:height", it.toString())) }
+            image.alt?.let { tags.add(createMetaTag("og:image:alt", it)) }
+        }
+    }
+
+    /**
+     * Adds video meta tags to the list.
+     * 
+     * @param videos The list of Video objects
+     * @param tags The list to add the tags to
+     */
+    private fun addVideoTags(videos: List<Video>, tags: MutableList<String>) {
+        videos.forEach { video ->
+            video.url?.let { tags.add(createMetaTag("og:video", it)) }
+            video.secureUrl?.let { tags.add(createMetaTag("og:video:secure_url", it)) }
+            video.type?.let { tags.add(createMetaTag("og:video:type", it)) }
+            video.width?.let { tags.add(createMetaTag("og:video:width", it.toString())) }
+            video.height?.let { tags.add(createMetaTag("og:video:height", it.toString())) }
+            video.duration?.let { tags.add(createMetaTag("og:video:duration", it.toString())) }
+        }
+    }
+
+    /**
+     * Adds audio meta tags to the list.
+     * 
+     * @param audios The list of Audio objects
+     * @param tags The list to add the tags to
+     */
+    private fun addAudioTags(audios: List<Audio>, tags: MutableList<String>) {
+        audios.forEach { audio ->
+            audio.url?.let { tags.add(createMetaTag("og:audio", it)) }
+            audio.secureUrl?.let { tags.add(createMetaTag("og:audio:secure_url", it)) }
+            audio.type?.let { tags.add(createMetaTag("og:audio:type", it)) }
+        }
+    }
+
+    /**
+     * Adds article-specific meta tags to the list.
+     * 
+     * @param article The Article object
+     * @param tags The list to add the tags to
+     */
+    private fun addArticleTags(article: Article?, tags: MutableList<String>) {
+        if (article == null) return
+
+        article.publishedTime?.let { tags.add(createMetaTag("og:article:published_time", formatDateTime(it))) }
+        article.modifiedTime?.let { tags.add(createMetaTag("og:article:modified_time", formatDateTime(it))) }
+        article.expirationTime?.let { tags.add(createMetaTag("og:article:expiration_time", formatDateTime(it))) }
+        article.section?.let { tags.add(createMetaTag("og:article:section", it)) }
+
+        article.authors.forEach { author ->
+            tags.add(createMetaTag("og:article:author", author))
+        }
+
+        article.tags.forEach { tag ->
+            tags.add(createMetaTag("og:article:tag", tag))
+        }
+    }
+
+    /**
+     * Adds profile-specific meta tags to the list.
+     * 
+     * @param profile The Profile object
+     * @param tags The list to add the tags to
+     */
+    private fun addProfileTags(profile: Profile?, tags: MutableList<String>) {
+        if (profile == null) return
+
+        profile.firstName?.let { tags.add(createMetaTag("og:profile:first_name", it)) }
+        profile.lastName?.let { tags.add(createMetaTag("og:profile:last_name", it)) }
+        profile.username?.let { tags.add(createMetaTag("og:profile:username", it)) }
+        profile.gender?.let { tags.add(createMetaTag("og:profile:gender", it.toString())) }
+    }
+
+    /**
+     * Adds book-specific meta tags to the list.
+     * 
+     * @param book The Book object
+     * @param tags The list to add the tags to
+     */
+    private fun addBookTags(book: Book?, tags: MutableList<String>) {
+        if (book == null) return
+
+        book.authors.forEach { author ->
+            tags.add(createMetaTag("og:book:author", author))
+        }
+
+        book.isbn?.let { tags.add(createMetaTag("og:book:isbn", it)) }
+        book.releaseDate?.let { tags.add(createMetaTag("og:book:release_date", formatDateTime(it))) }
+
+        book.tags.forEach { tag ->
+            tags.add(createMetaTag("og:book:tag", tag))
+        }
+    }
+
+    /**
+     * Adds music.song-specific meta tags to the list.
+     * 
+     * @param musicSong The MusicSong object
+     * @param tags The list to add the tags to
+     */
+    private fun addMusicSongTags(musicSong: MusicSong?, tags: MutableList<String>) {
+        if (musicSong == null) return
+
+        musicSong.duration?.let { tags.add(createMetaTag("og:music:duration", it.toString())) }
+        musicSong.album?.let { tags.add(createMetaTag("og:music:album", it)) }
+        musicSong.albumDisc?.let { tags.add(createMetaTag("og:music:album:disc", it.toString())) }
+        musicSong.albumTrack?.let { tags.add(createMetaTag("og:music:album:track", it.toString())) }
+
+        musicSong.musician.forEach { musician ->
+            tags.add(createMetaTag("og:music:musician", musician))
+        }
+    }
+
+    /**
+     * Adds music.album-specific meta tags to the list.
+     * 
+     * @param musicAlbum The MusicAlbum object
+     * @param tags The list to add the tags to
+     */
+    private fun addMusicAlbumTags(musicAlbum: MusicAlbum?, tags: MutableList<String>) {
+        if (musicAlbum == null) return
+
+        musicAlbum.songs.forEach { song ->
+            tags.add(createMetaTag("og:music:song", song))
+        }
+
+        musicAlbum.songDisc?.let { tags.add(createMetaTag("og:music:song:disc", it.toString())) }
+        musicAlbum.songTrack?.let { tags.add(createMetaTag("og:music:song:track", it.toString())) }
+
+        musicAlbum.musician.forEach { musician ->
+            tags.add(createMetaTag("og:music:musician", musician))
+        }
+
+        musicAlbum.releaseDate?.let { tags.add(createMetaTag("og:music:release_date", formatDateTime(it))) }
+    }
+
+    /**
+     * Adds music.playlist-specific meta tags to the list.
+     * 
+     * @param musicPlaylist The MusicPlaylist object
+     * @param tags The list to add the tags to
+     */
+    private fun addMusicPlaylistTags(musicPlaylist: MusicPlaylist?, tags: MutableList<String>) {
+        if (musicPlaylist == null) return
+
+        musicPlaylist.songs.forEach { song ->
+            tags.add(createMetaTag("og:music:song", song))
+        }
+
+        musicPlaylist.songDisc?.let { tags.add(createMetaTag("og:music:song:disc", it.toString())) }
+        musicPlaylist.songTrack?.let { tags.add(createMetaTag("og:music:song:track", it.toString())) }
+        musicPlaylist.creator?.let { tags.add(createMetaTag("og:music:creator", it)) }
+    }
+
+    /**
+     * Adds music.radio_station-specific meta tags to the list.
+     * 
+     * @param musicRadioStation The MusicRadioStation object
+     * @param tags The list to add the tags to
+     */
+    private fun addMusicRadioStationTags(musicRadioStation: MusicRadioStation?, tags: MutableList<String>) {
+        if (musicRadioStation == null) return
+
+        musicRadioStation.creator?.let { tags.add(createMetaTag("og:music:creator", it)) }
+    }
+
+    /**
+     * Adds video.movie-specific meta tags to the list.
+     * 
+     * @param videoMovie The VideoMovie object
+     * @param tags The list to add the tags to
+     */
+    private fun addVideoMovieTags(videoMovie: VideoMovie?, tags: MutableList<String>) {
+        if (videoMovie == null) return
+
+        videoMovie.actors.forEach { actor ->
+            tags.add(createMetaTag("og:video:actor", actor))
+        }
+
+        videoMovie.director.forEach { director ->
+            tags.add(createMetaTag("og:video:director", director))
+        }
+
+        videoMovie.writer.forEach { writer ->
+            tags.add(createMetaTag("og:video:writer", writer))
+        }
+
+        videoMovie.duration?.let { tags.add(createMetaTag("og:video:duration", it.toString())) }
+        videoMovie.releaseDate?.let { tags.add(createMetaTag("og:video:release_date", formatDateTime(it))) }
+
+        videoMovie.tags.forEach { tag ->
+            tags.add(createMetaTag("og:video:tag", tag))
+        }
+    }
+
+    /**
+     * Adds video.episode-specific meta tags to the list.
+     * 
+     * @param videoEpisode The VideoEpisode object
+     * @param tags The list to add the tags to
+     */
+    private fun addVideoEpisodeTags(videoEpisode: VideoEpisode?, tags: MutableList<String>) {
+        if (videoEpisode == null) return
+
+        videoEpisode.actors.forEach { actor ->
+            tags.add(createMetaTag("og:video:actor", actor))
+        }
+
+        videoEpisode.director.forEach { director ->
+            tags.add(createMetaTag("og:video:director", director))
+        }
+
+        videoEpisode.writer.forEach { writer ->
+            tags.add(createMetaTag("og:video:writer", writer))
+        }
+
+        videoEpisode.duration?.let { tags.add(createMetaTag("og:video:duration", it.toString())) }
+        videoEpisode.releaseDate?.let { tags.add(createMetaTag("og:video:release_date", formatDateTime(it))) }
+
+        videoEpisode.tags.forEach { tag ->
+            tags.add(createMetaTag("og:video:tag", tag))
+        }
+
+        videoEpisode.series?.let { tags.add(createMetaTag("og:video:series", it)) }
+    }
+
+    /**
+     * Creates an HTML meta tag with the given property and content.
+     * 
+     * @param property The property attribute value
+     * @param content The content attribute value
+     * @return The HTML meta tag string
+     */
+    private fun createMetaTag(property: String, content: String): String {
+        val escapedContent = content.replace("\"", "&quot;")
+        return "<meta property=\"$property\" content=\"$escapedContent\" />"
+    }
+
+    /**
+     * Formats an OffsetDateTime to a string suitable for OpenGraph tags.
+     * 
+     * @param dateTime The OffsetDateTime to format
+     * @return The formatted date string in ISO-8601 format with 'Z' timezone indicator
+     */
+    private fun formatDateTime(dateTime: OffsetDateTime): String {
+        return dateTime.toInstant().toString()
+    }
+}