Plugin: add chat visualization of url images

src/main/java/net/flectone/chat/component/FComponent.java

@@ -1,5 +1,6 @@
 package net.flectone.chat.component;
 
+import lombok.Getter;
 import net.flectone.chat.FlectoneChat;
 import net.flectone.chat.model.file.FConfiguration;
 import net.md_5.bungee.api.chat.BaseComponent;
@@ -16,6 +17,8 @@ public class FComponent {
     private final BaseComponent component;
     protected final FConfiguration locale;
     protected final FConfiguration config;
+    @Getter
+    private HoverEvent hoverEvent;
 
     public FComponent(@Nullable BaseComponent baseComponent) {
         this.component = baseComponent;
@@ -54,7 +57,7 @@ public FComponent addHoverText(@NotNull String showText) {
 
     @NotNull
     public FComponent addHoverText(@NotNull BaseComponent[] baseComponents) {
-        component.setHoverEvent(new HoverEvent(HoverEvent.Action.SHOW_TEXT, baseComponents));
+        setHoverEvent(new HoverEvent(HoverEvent.Action.SHOW_TEXT, baseComponents));
         return this;
     }
 
@@ -66,7 +69,7 @@ public FComponent addOpenURL(@NotNull String url) {
 
     @NotNull
     public FComponent addHoverItem(@NotNull String itemJson) {
-        component.setHoverEvent(new HoverEvent(HoverEvent.Action.SHOW_ITEM, new BaseComponent[]{new TextComponent(itemJson)}));
+        setHoverEvent(new HoverEvent(HoverEvent.Action.SHOW_ITEM, new BaseComponent[]{new TextComponent(itemJson)}));
         return this;
     }
 
@@ -81,4 +84,9 @@ public FComponent addSuggestCommand(@NotNull String command) {
         component.setClickEvent(new ClickEvent(ClickEvent.Action.SUGGEST_COMMAND, command));
         return this;
     }
+
+    public void setHoverEvent(@NotNull HoverEvent hoverEvent) {
+        component.setHoverEvent(hoverEvent);
+        this.hoverEvent = hoverEvent;
+    }
 }

src/main/java/net/flectone/chat/component/FImageComponent.java

@@ -0,0 +1,100 @@
+package net.flectone.chat.component;
+
+import lombok.Getter;
+import net.flectone.chat.util.ColorUtil;
+import org.apache.commons.io.FilenameUtils;
+import org.jetbrains.annotations.NotNull;
+
+import javax.imageio.ImageIO;
+import java.awt.image.BufferedImage;
+import java.net.URL;
+import java.util.ArrayList;
+import java.util.List;
+
+@Getter
+public class FImageComponent extends FComponent {
+
+    private boolean isCorrect;
+
+    private String text;
+
+    public FImageComponent(@NotNull String imageUrl) {
+        try {
+            this.isCorrect = convertImageUrl(imageUrl);
+        } catch (Exception ignored) {}
+    }
+
+    // Idea taken from here
+    // https://github.com/QuiltServerTools/BlockBot/blob/5d5fa854002de2c12200edbe22f12382350ca7eb/src/main/kotlin/io/github/quiltservertools/blockbotdiscord/extensions/BlockBotApiExtension.kt#L136
+    public boolean convertImageUrl(@NotNull String imageUrl) throws Exception {
+        URL url = new URL(imageUrl);
+
+        BufferedImage bufferedImage = ImageIO.read(url);
+        if (bufferedImage == null) return false;
+
+        text = FilenameUtils.getName(url.getPath());
+
+        int width = bufferedImage.getWidth();
+        int height = bufferedImage.getHeight();
+
+        if (height * width >= 8 * 1024 * 1024) return false;
+
+        int stepSize = Math.max((int) Math.ceil(bufferedImage.getWidth() / 48.0), 1);
+        int stepSquared = stepSize * stepSize;
+
+        int x = 0;
+        int y = 0;
+
+        List<String> loreList = new ArrayList<>();
+        loreList.add("");
+
+        while (y < height) {
+            StringBuilder text = new StringBuilder();
+            while (x < width) {
+                int rgb;
+
+                if (stepSize != 1) {
+                    int r = 0;
+                    int g = 0;
+                    int b = 0;
+
+                    for (int x2 = 0; x2 < stepSize; x2++) {
+                        for (int y2 = 0; y2 < stepSize; y2++) {
+                            int color = bufferedImage.getRGB(clamp(x + x2, 0, width - 1), clamp(y + y2, 0, height - 1));
+                            r += (color >> 16) & 0xFF;
+                            g += (color >> 8) & 0xFF;
+                            b += color & 0xFF;
+                        }
+                    }
+
+                    rgb = ((r / stepSquared) << 16) | ((g / stepSquared) << 8) | (b / stepSquared);
+                } else {
+                    rgb = bufferedImage.getRGB(x, y) & 0xFFFFFF;
+                }
+
+                String hexColor = String.format("#%06x", rgb);
+                String pixel = "█";
+                text.append(hexColor).append(pixel);
+                x += stepSize;
+            }
+
+            loreList.add(text.toString());
+            y += stepSize;
+            x = 0;
+        }
+
+        StringBuilder stringBuilder = new StringBuilder();
+        for (String loreText : loreList) {
+            String translatedColor = ColorUtil.translateHexToColor(loreText);
+            stringBuilder.append(translatedColor).append("\n");
+        }
+
+        addHoverText(stringBuilder.toString());
+
+        return true;
+    }
+
+    private static int clamp(int value, int min, int max) {
+        return Math.max(min, Math.min(value, max));
+    }
+}

src/main/java/net/flectone/chat/model/message/WordParams.java

@@ -2,6 +2,7 @@
 
 import lombok.Getter;
 import lombok.Setter;
+import net.flectone.chat.component.FImageComponent;
 import org.bukkit.ChatColor;
 
 import java.util.ArrayList;
@@ -15,6 +16,8 @@ public class WordParams {
     private String playerPingName;
     private String urlText;
     private String hideMessage;
+    private FImageComponent imageComponent;
+    private boolean isImage;
     private boolean clickable;
     private boolean isHide;
     private boolean isPlayerPing;
@@ -45,7 +48,7 @@ public String getChatColor(String param) {
     }
 
     public boolean isEdited() {
-        return isPlayerPing() || isHide() || isUrl() || isClickable() || isItem() || isCords() || isStats() || isPing();
+        return isPlayerPing() || isHide() || isUrl() || isClickable() || isItem() || isCords() || isStats() || isPing() || isImage();
     }
 
     public void addParameters(List<String> parameters) {

src/main/java/net/flectone/chat/module/playerMessage/formatting/FormattingModule.java

@@ -222,6 +222,21 @@ private void splitStringToWordParams(@Nullable Player sender, @NotNull String co
                     }
                 }
 
+                if (isAsync
+                        && isUrlAllowed(sender, word)
+                        && config.getVaultBoolean(sender, this + ".list.url.image.enable")
+                        && !hasNoPermission(sender, "url.image")) {
+                    FImageComponent fImageComponent = new FImageComponent(word);
+                    if (fImageComponent.isCorrect()) {
+                        word = config.getVaultString(sender, this + ".list.url.image.format")
+                                .replace("<image>", fImageComponent.getText());
+                        wordParams.setText(word);
+                        wordParams.setImageComponent(fImageComponent);
+                        wordParams.setImage(true);
+                        return wordParams;
+                    }
+                }
+
                 Matcher urlMatcher = Pattern.compile(formattingMap.get("url")).matcher(word);
                 if (urlMatcher.find()) {
                     wordParams.setUrlText(word.substring(urlMatcher.start(0), urlMatcher.end(0)));
@@ -328,4 +343,18 @@ private void splitStringToWordParams(@Nullable Player sender, @NotNull String co
         }
     }
 
+    public boolean isUrlAllowed(@Nullable CommandSender player, @NotNull String urlString) {
+        Pattern pattern = Pattern.compile("^(?:https?://)?([^/]+)");
+        Matcher matcher = pattern.matcher(urlString);
+
+        if (matcher.find()) {
+            String host = matcher.group(1).toLowerCase();
+            return FlectoneChat.getPlugin().getFileManager()
+                    .getConfig()
+                    .getVaultStringList(player, this + ".list.url.image.whitelist-site")
+                    .contains(host);
+        }
+
+        return false;
+    }
 }

src/main/resources/config.yml

@@ -262,6 +262,15 @@ default:
 
           markdown-support: true
 
+          image:
+            enable: true
+
+            format: "&&1🎨<image>"
+
+            whitelist-site:
+              - "cdn.discordapp.com"
+              - "i.imgur.com"
+
           trigger: ((https?|ftp|gopher|telnet|file):((//)|(\\))+[\w:#@%/;$()~_?+-=\\.&]*)
 
           format: "&&1<message>"

src/main/resources/plugin.yml

@@ -74,6 +74,8 @@ permissions:
     default: true
   flectonechat.player-message.formatting.markdown-url:
     default: true
+  flectonechat.player-message.formatting.url.image:
+    default: true
   flectonechat.player-message.formatting.item:
     default: true
   flectonechat.player-message.formatting.mention: