1 files changed, 90 insertions, 0 deletions
diff --git a/app/src/main/java/it/niedermann/nextcloud/deck/util/ProjectUtil.java b/app/src/main/java/it/niedermann/nextcloud/deck/util/ProjectUtil.java
new file mode 100644
index 000000000..58c465290
--- /dev/null
+++ b/app/src/main/java/it/niedermann/nextcloud/deck/util/ProjectUtil.java
@@ -0,0 +1,90 @@
+package it.niedermann.nextcloud.deck.util;
+
+import android.net.Uri;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
+import java.net.URL;
+
+import it.niedermann.nextcloud.deck.model.Account;
+
+public class ProjectUtil {
+
+    private ProjectUtil() {
+    }
+
+    @NonNull
+    public static Uri getResourceUri(@NonNull Account account, @NonNull String link) throws IllegalArgumentException {
+        try {
+            // Assume link contains a fully qualified Uri including host
+            final URL u = new URL(link);
+            return Uri.parse(u.toString());
+        } catch (Throwable linkIsNotQualified) {
+            try {
+                // Assume link is a absolute path that needs to be concatenated with account url for a complete Uri
+                final URL u = new URL(account.getUrl() + link);
+                return Uri.parse(u.toString());
+            } catch (Throwable throwable) {
+                throw new IllegalArgumentException("Could not parse " + Uri.class.getSimpleName() + ": " + link, throwable);
+            }
+        }
+    }
+
+    /**
+     * extracts the values of board- and card-ID from url.
+     * Depending on what kind of url it gets, it will return a long[] of length 1 or 2:
+     * If the url contains both values, you'll get 2, if it contains only the board, you'll get 1.
+     * <p>
+     * The order is fixed here: [boardId, cardId]
+     *
+     * @param url to extract from
+     * @return extracted and parsed values as long[] with length 1-2
+     */
+    public static long[] extractBoardIdAndCardIdFromUrl(@Nullable String url) throws IllegalArgumentException {
+        if (url == null) {
+            throw new IllegalArgumentException("provided url is null");
+        }
+        url = url.trim();
+        if (url.length() == 0) {
+            throw new IllegalArgumentException("trimmed url is empty");
+        }
+        // extract important part
+        String[] splitByPrefix = url.split(".*(index\\.php/)?apps/deck(/#)?/board/");
+        // split into board- and card part
+        if (splitByPrefix.length < 2) {
+            throw new IllegalArgumentException("This URL doesn't seem to be an URL containing the boardId: \"" + url + "\"");
+        }
+        String[] splitBySeparator = splitByPrefix[1].split("/card/");
+
+        // remove any unexpected stuff
+        if (splitBySeparator.length > 1 && splitBySeparator[1].contains("/")) {
+            splitBySeparator[1] = splitBySeparator[1].split("/")[0];
+        }
+        if (splitBySeparator.length > 0 && splitBySeparator[0].contains("/")) {
+            splitBySeparator[0] = splitBySeparator[0].split("/")[0];
+        }
+
+        if (splitBySeparator.length < 1) {
+            throw new IllegalArgumentException("This URL doesn't seem to be an URL containing the boardId: \"" + url + "\"");
+        }
+
+        // return result
+        long boardId = Long.parseLong(splitBySeparator[0]);
+        if (boardId < 1) {
+            throw new IllegalArgumentException("Invalid boardId \"" + boardId + "\" for url \"" + url + "\".");
+        }
+        if (splitBySeparator.length == 1) {
+            return new long[]{boardId};
+        } else if (splitBySeparator.length == 2) {
+            long cardId = Long.parseLong(splitBySeparator[1]);
+            if (cardId > 0) {
+                return new long[]{boardId, cardId};
+            } else {
+                return new long[]{boardId};
+            }
+        } else {
+            throw new IllegalArgumentException("could not parse URL for boardId and/or cardId: \"" + url + "\"");
+        }
+    }
+}