Initial commitHEADmaster

2 files changed, 122 insertions, 0 deletions

diff --git a/src/main/java/zajc/gogarchiver/util/LazyValue.java b/src/main/java/zajc/gogarchiver/util/LazyValue.java
new file mode 100644
index 0000000..118193f
--- /dev/null
+++ b/src/main/java/zajc/gogarchiver/util/LazyValue.java
@@ -0,0 +1,42 @@
+//SPDX-License-Identifier: GPL-3.0
+/*
+ * gogarchiver-ng, an archival tool for GOG.com
+ * Copyright (C) 2024 Marko Zajc
+ *
+ * This program is free software: you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License as published by the Free Software
+ * Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+ * PARTICULAR PURPOSE. See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with this
+ * program. If not, see <https://www.gnu.org/licenses/>.
+ */
+package zajc.gogarchiver.util;
+
+import java.util.function.Supplier;
+
+import javax.annotation.*;
+
+public class LazyValue<T> {
+
+        @Nullable private volatile T value;
+
+        public T get(@Nonnull Supplier<T> generator) {
+                if (this.value != null)
+                        return this.value;
+                synchronized (this) {
+                        if (this.value != null) // double checked locking
+                                return this.value;
+                        else
+                                return this.value = generator.get();
+                }
+        }
+
+        public synchronized void unset() {
+                this.value = null;
+        }
+
+}
diff --git a/src/main/java/zajc/gogarchiver/util/Utilities.java b/src/main/java/zajc/gogarchiver/util/Utilities.java
new file mode 100644
index 0000000..d039ab1
--- /dev/null
+++ b/src/main/java/zajc/gogarchiver/util/Utilities.java
@@ -0,0 +1,80 @@
+//SPDX-License-Identifier: GPL-3.0
+/*
+ * gogarchiver-ng, an archival tool for GOG.com
+ * Copyright (C) 2024 Marko Zajc
+ *
+ * This program is free software: you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License as published by the Free Software
+ * Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+ * PARTICULAR PURPOSE. See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with this
+ * program. If not, see <https://www.gnu.org/licenses/>.
+ */
+package zajc.gogarchiver.util;
+
+import static java.lang.System.err;
+import static picocli.CommandLine.Help.defaultColorScheme;
+
+import java.util.stream.*;
+
+import javax.annotation.*;
+
+import kong.unirest.HttpResponse;
+import kong.unirest.json.JSONArray;
+import picocli.CommandLine.Help.*;
+
+public class Utilities {
+
+        private static boolean enableVerbose = false;
+        private static ColorScheme colorScheme;
+
+        public static void setVerbose(boolean verbose) {
+                enableVerbose = verbose;
+        }
+
+        public static void setColorMode(@Nonnull Ansi ansi) {
+                colorScheme = defaultColorScheme(ansi);
+        }
+
+        public static void println(@Nullable Object text) {
+                err.println(colorScheme.text(String.valueOf(text)));
+        }
+
+        public static void printf(@Nonnull String format, @Nonnull Object... args) {
+                err.print(colorScheme.text(format.formatted(args)));
+        }
+
+        public static void warn(@Nonnull String text, @Nonnull Object... args) {
+                println("@|yellow [W]|@ " + text.formatted(args));
+        }
+
+        public static void verbose(@Nonnull String text, @Nonnull Object... args) {
+                if (enableVerbose)
+                        println("@|faint [V]|@ " + text.formatted(args));
+        }
+
+        public static <T> HttpResponse<T> checkResponse(String url, HttpResponse<T> resp) {
+                if (!resp.isSuccess())
+                        throw new RuntimeException("Got a bad HTTP response on %s: %d %s".formatted(url, resp.getStatus(),
+                                                                                                                                                                                resp.getStatusText()));
+
+                return resp;
+        }
+
+        @Nonnull
+        @SuppressWarnings("null")
+        public static Stream<Object> stream(JSONArray array) {
+                return StreamSupport.stream(array.spliterator(), false);
+        }
+
+        public static void cursorUp() {
+                err.print("\u001b[1A");
+        }
+
+        private Utilities() {}
+
+}