1 files changed, 71 insertions, 0 deletions
diff --git a/vnext/src/api/index.js b/vnext/src/api/index.js
index fac845e8..2af6c867 100644
--- a/vnext/src/api/index.js
+++ b/vnext/src/api/index.js
@@ -281,4 +281,75 @@ export function fetchUserUri(profileUrl) {
     }
 };
 
+/**
+ * Fetch Tweet content
+ *
+ * @param {string} url Tweet URL
+ * @returns {Promise<string>} HTML content
+ */
+ const embeddedTweet = async (url = '') => {
+    const response = await axios.get('https://publish.twitter.com/oembed', {
+        params: {
+            'dnt': true,
+            'omit_script': true,
+            'url': url
+        }
+    });
+    return response.data;
+};
+
+/**
+ * Checks if HTTP error code is redirection code
+ *
+ * @param {number} code HTTP error code
+ * @returns {boolean} is HTTP request redirected or not
+ */
+function isHttpRedirected(code = 200) {
+    return [301, 302].includes(code);
+}
+
+/**
+ * Checks if HTTP error code is successful code
+ *
+ * @param {number} code HTTP error code
+ * @returns {boolean} is HTTP request successful or not
+ */
+function isHttpSuccessful(code = 200) {
+    return code >= 200 && code < 300;
+}
+
+/**
+ * Resolves shortened url to actual one
+ *
+ * @param {string} url URL to resolve
+ * @returns {Promise<string>} full URL
+ */
+function expandShortenedLink(url = '') {
+    return new Promise((resolve, reject) => {
+        axios.head(url, {
+            maxRedirects: 0
+        }).then(response => {
+            if (isHttpSuccessful(response.status)) {
+                // URL is not redirected
+                resolve(url);
+                return;
+            }
+            if (isHttpRedirected(response.status)) {
+                resolve(/** @type { string } */ (response.headers['Location']));
+                return;
+            }
+            // Error case
+            reject('Invalid response');
+        }).catch(error => {
+            reject(error);
+        });
+    });
+}
+
+export {
+    embeddedTweet,
+    expandShortenedLink
+};
+
+