Added a ResourceService

- Allows customizable files
- Allows js and css addition to html files

Plan/api/src/main/java/com/djrapitops/plan/delivery/web/ResourceService.java

@@ -0,0 +1,84 @@
+/*
+ *  This file is part of Player Analytics (Plan).
+ *
+ *  Plan is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Lesser General Public License v3 as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  Plan 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 Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public License
+ *  along with Plan. If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.djrapitops.plan.delivery.web;
+
+import com.djrapitops.plan.delivery.web.resource.Resource;
+
+import java.util.function.Supplier;
+
+/**
+ * Service for making plugin resources customizable by user or Plan API.
+ *
+ * @author Rsl1122
+ */
+public interface ResourceService {
+
+    /**
+     * Make one of your web resources customizable by user or Plan API.
+     *
+     * @param pluginName Name of your plugin (for config purposes)
+     * @param fileName   Name of the file (for customization)
+     * @param source     Supplier to use to get the original resource.
+     * @return Resource of the customized file.
+     */
+    Resource getResource(String pluginName, String fileName, Supplier<Resource> source);
+
+    /**
+     * Add javascript to load in an existing html resource.
+     * <p>
+     * Adds {@code <script src="jsSrc"></script>} or multiple to the resource.
+     *
+     * @param pluginName Name of your plugin (for config purposes)
+     * @param fileName   Name of the .html file being modified
+     * @param position   Where to place the script tag on the page.
+     * @param jsSrcs     Source URLs.
+     * @throws IllegalArgumentException If fileName does not end with .html or .htm
+     */
+    void addScriptsToResource(String pluginName, String fileName, Position position, String... jsSrcs);
+
+    /**
+     * Add css to load in an existing html resource.
+     * <p>
+     * Adds {@code <link href="cssSrc" rel="stylesheet"></link>} or multiple to the resource.
+     *
+     * @param pluginName Name of your plugin (for config purposes)
+     * @param fileName   Name of the .html file being modified
+     * @param position   Where to place the link tag on the page.
+     * @param cssSrcs    Source URLs.
+     * @throws IllegalArgumentException If fileName does not end with .html or .htm
+     */
+    void addStylesToResource(String pluginName, String fileName, Position position, String... cssSrcs);
+
+    enum Position {
+        /**
+         * Loaded before page contents.
+         */
+        HEAD,
+        /**
+         * Loaded after page contents.
+         * <p>
+         * Recommended for modifying the structure of the page or loading libraries.
+         */
+        BODY,
+        /**
+         * Loaded after script execution.
+         * <p>
+         * Recommended for loading data to custom structure on the page.
+         */
+        BODY_END
+    }
+}

Plan/api/src/main/java/com/djrapitops/plan/delivery/web/resource/Resource.java

@@ -0,0 +1,82 @@
+/*
+ *  This file is part of Player Analytics (Plan).
+ *
+ *  Plan is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Lesser General Public License v3 as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  Plan 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 Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public License
+ *  along with Plan. If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.djrapitops.plan.delivery.web.resource;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.charset.StandardCharsets;
+
+/**
+ * Represents a customizable resource.
+ * <p>
+ * You can use the create methods for simple resources when using {@link com.djrapitops.plan.delivery.web.ResourceService}.
+ */
+public interface Resource {
+
+    static Resource create(byte[] content) {
+        return new ByteResource(content);
+    }
+
+    static Resource create(String utf8String) {
+        return new ByteResource(utf8String.getBytes(StandardCharsets.UTF_8));
+    }
+
+    static Resource create(InputStream in) throws IOException {
+        try (ByteArrayOutputStream out = new ByteArrayOutputStream()) {
+            int read;
+            byte[] bytes = new byte[1024];
+            while ((read = in.read(bytes)) != -1) {
+                out.write(bytes, 0, read);
+            }
+
+            return new ByteResource(out.toByteArray());
+        } finally {
+            in.close();
+        }
+    }
+
+    byte[] asBytes();
+
+    String asString();
+
+    InputStream asStream();
+
+    final class ByteResource implements Resource {
+        private final byte[] content;
+
+        public ByteResource(byte[] content) {
+            this.content = content;
+        }
+
+        @Override
+        public byte[] asBytes() {
+            return content;
+        }
+
+        @Override
+        public String asString() {
+            return new String(content, StandardCharsets.UTF_8);
+        }
+
+        @Override
+        public InputStream asStream() {
+            return new ByteArrayInputStream(content);
+        }
+    }
+}