+/**
+ * Returns the ID of the currently logged in Sone.
+ *
+ * @return The ID of the current Sone, or an empty string if no Sone is logged
+ * in
+ */
+function getCurrentSoneId() {
+ return $("#currentSoneId").text();
+}
+
+/**
+ * Returns the content of the page-id attribute.
+ *
+ * @returns The page ID
+ */
+function getPageId() {
+ return $("#sone .page-id").text();
+}
+
+/**
+ * Returns whether the current page is the index page.
+ *
+ * @returns {Boolean} <code>true</code> if the current page is the index page,
+ * <code>false</code> otherwise
+ */
+function isIndexPage() {
+ return getPageId() == "index";
+}
+
+/**
+ * Returns whether the current page is a “view Sone” page.
+ *
+ * @returns {Boolean} <code>true</code> if the current page is a “view Sone”
+ * page, <code>false</code> otherwise
+ */
+function isViewSonePage() {
+ return getPageId() == "view-sone";
+}
+
+/**
+ * Returns the ID of the currently shown Sone. This will only return a sensible
+ * value if isViewSonePage() returns <code>true</code>.
+ *
+ * @returns The ID of the currently shown Sone
+ */
+function getShownSoneId() {
+ return $("#sone .sone-id").text();
+}
+
+/**
+ * Returns whether the current page is a “view post” page.
+ *
+ * @returns {Boolean} <code>true</code> if the current page is a “view post”
+ * page, <code>false</code> otherwise
+ */
+function isViewPostPage() {
+ return getPageId() == "view-post";
+}
+
+/**
+ * Returns the ID of the currently shown post. This will only return a sensible
+ * value if isViewPostPage() returns <code>true</code>.
+ *
+ * @returns The ID of the currently shown post
+ */
+function getShownPostId() {
+ return $("#sone .post-id").text();
+}
+
+/**
+ * Returns whether the current page is the “known Sones” page.
+ *
+ * @returns {Boolean} <code>true</code> if the current page is the “known
+ * Sones” page, <code>false</code> otherwise
+ */
+function isKnownSonesPage() {
+ return getPageId() == "known-sones";
+}
+
+/**
+ * Returns whether a post with the given ID exists on the current page.
+ *
+ * @param postId
+ * The post ID to check for
+ * @returns {Boolean} <code>true</code> if a post with the given ID already
+ * exists on the page, <code>false</code> otherwise
+ */
+function hasPost(postId) {
+ return $(".post#" + postId).length > 0;
+}
+
+/**
+ * Returns whether a reply with the given ID exists on the current page.
+ *
+ * @param replyId
+ * The reply ID to check for
+ * @returns {Boolean} <code>true</code> if a reply with the given ID already
+ * exists on the page, <code>false</code> otherwise
+ */
+function hasReply(replyId) {
+ return $("#sone .reply#" + replyId).length > 0;
+}