*/
package net.pterodactylus.arachne.core;
+import java.net.MalformedURLException;
+import java.net.URL;
+
+import de.ina.util.validation.Validation;
+
/**
- * Container for a page. A page consists of a {@link Site} and a path within the
- * site.
+ * Container for a page. A page consists of an {@link Edition} and a path within
+ * the edition.
*
* @author David ‘Bombe’ Roden <bombe@pterodactylus.net>
*/
public class Page {
- /** The site of the page. */
- private final Site site;
+ /** The edition of the page. */
+ private final Edition edition;
/** The path of the page. */
private final String path;
/**
* Creates a new page.
*
- * @param site
- * The site of the page
+ * @param edition
+ * The edition of the page
* @param path
* The path of the page
*/
- public Page(Site site, String path) {
- this.site = site;
+ public Page(Edition edition, String path) {
+ this.edition = edition;
this.path = path;
}
/**
- * Returns the site of the page.
+ * Returns the edition of the page.
*
- * @return The page’s site
+ * @return The page’s edition
*/
- public Site getSite() {
- return site;
+ public Edition getEdition() {
+ return edition;
}
/**
return path;
}
+ /**
+ * Creates a URL from the given page.
+ *
+ * @param host
+ * The host of the URL
+ * @param port
+ * The port number of the URL
+ * @return The created URL, or <code>null</code> if the URL could not be
+ * created
+ */
+ public URL toURL(String host, int port) {
+ try {
+ return new URL("http://" + host + ":" + port + "/SSK@" + getEdition().getSite().getKey() + "/" + getEdition().getSite().getBasename() + "-" + getEdition().getNumber() + "/" + getPath());
+ } catch (MalformedURLException mue1) {
+ /* nearly impossible. */
+ }
+ return null;
+ }
+
+ //
+ // STATIC METHODS
+ //
+
+ /**
+ * Creates a page from the given URL.
+ *
+ * @param url
+ * The URL to create a page from
+ * @return The created page, or <code>null</code> if the page could not be
+ * created
+ */
+ public static Page fromURL(URL url) {
+ String path = url.getPath();
+ if (path.length() == 0) {
+ path = "/";
+ }
+ String[] pathComponents = path.split("/");
+ if (pathComponents.length < 2) {
+ throw new IllegalArgumentException("URL “" + url + "” is not a valid freenet page.");
+ }
+ String siteName = pathComponents[1];
+ String[] siteComponents = siteName.split("@");
+ if (siteComponents.length != 2) {
+ throw new IllegalArgumentException("siteName “" + siteName + "” is not a valid freenet page.");
+ }
+ if (!"USK".equals(siteComponents[0]) && !"SSK".equals(siteComponents[0]) && !"CHK".equals(siteComponents[0])) {
+ throw new IllegalArgumentException("siteName “" + siteName + "” is not a valid freenet page.");
+ }
+ if ("USK".equals(siteComponents[0])) {
+ Site site = new Site(siteComponents[1], pathComponents[2]);
+ Edition edition = new Edition(site, Integer.parseInt(pathComponents[3]));
+ Page page = new Page(edition, createPath(pathComponents, 4));
+ return page;
+ }
+ if ("SSK".equals(siteComponents[0])) {
+ int lastDash = pathComponents[2].lastIndexOf('-');
+ String basename = pathComponents[2].substring(0, lastDash);
+ int editionNumber = Integer.parseInt(pathComponents[2].substring(lastDash + 1));
+ Site site = new Site(siteComponents[1], basename);
+ Edition edition = new Edition(site, editionNumber);
+ Page page = new Page(edition, createPath(pathComponents, 3));
+ return page;
+ }
+ /* TODO: handle CHK */
+ return null;
+ }
+
+ //
+ // PRIVATE METHODS
+ //
+
+ /**
+ * Creates a path from the given String array, starting at the given index.
+ * The path is created by joining all Strings from the array, separating
+ * them with a slash (‘/’).
+ *
+ * @param pathComponents
+ * The array of path components
+ * @param index
+ * The index of the first path components
+ * @return The joined path
+ */
+ private static String createPath(String[] pathComponents, int index) {
+ Validation.begin().isNotNull("pathComponents", pathComponents).check().isLessOrEqual("index", index, pathComponents.length).check();
+ StringBuilder path = new StringBuilder();
+ for (int pathComponentIndex = index; pathComponentIndex < pathComponents.length; pathComponentIndex++) {
+ if (path.length() > 0) {
+ path.append('/');
+ }
+ path.append(pathComponents[pathComponentIndex]);
+ }
+ return path.toString();
+ }
+
+ //
+ // OBJECT METHODS
+ //
+
+ /**
+ * {@inheritdoc}
+ *
+ * @see java.lang.Object#toString()
+ */
+ @Override
+ public String toString() {
+ return getClass().getName() + "[edition=" + edition + ",path=" + path + "]";
+ }
+
}