Added DynamicPlaceholder and DynamicInjectablePlaceholder

eco-api/src/main/java/com/willfp/eco/core/placeholder/templates/DynamicInjectablePlaceholder.java

@@ -0,0 +1,59 @@
+package com.willfp.eco.core.placeholder.templates;
+
+import com.willfp.eco.core.EcoPlugin;
+import com.willfp.eco.core.placeholder.InjectablePlaceholder;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Objects;
+import java.util.regex.Pattern;
+
+/**
+ * A template class for dynamic placeholders.
+ */
+public abstract class DynamicInjectablePlaceholder implements InjectablePlaceholder {
+
+    /**
+     * The placeholder pattern.
+     */
+    private final Pattern pattern;
+
+    /**
+     * Create a new dynamic injectable placeholder.
+     *
+     * @param pattern The pattern.
+     */
+    protected DynamicInjectablePlaceholder(@NotNull final Pattern pattern) {
+        this.pattern = pattern;
+    }
+
+    @Override
+    public @NotNull Pattern getPattern() {
+        return pattern;
+    }
+
+    @Override
+    public String toString() {
+        return "DynamicInjectablePlaceholder{" +
+                "pattern='" + pattern + '\'' +
+                '}';
+    }
+
+    @Override
+    public boolean equals(@NotNull final Object o) {
+        if (this == o) {
+            return true;
+        }
+
+        if (!(o instanceof DynamicInjectablePlaceholder that)) {
+            return false;
+        }
+
+        return Objects.equals(pattern, that.getPattern())
+                && Objects.equals(plugin, that.getPlugin());
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(pattern, plugin);
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/placeholder/templates/DynamicPlaceholder.java

@@ -0,0 +1,73 @@
+package com.willfp.eco.core.placeholder.templates;
+
+import com.willfp.eco.core.EcoPlugin;
+import com.willfp.eco.core.placeholder.RegistrablePlaceholder;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Objects;
+import java.util.regex.Pattern;
+
+/**
+ * A template class for dynamic placeholders.
+ */
+public abstract class DynamicPlaceholder implements RegistrablePlaceholder {
+    /**
+     * The plugin.
+     */
+    private final EcoPlugin plugin;
+
+    /**
+     * The placeholder pattern.
+     */
+    private final Pattern pattern;
+
+    /**
+     * Create a new dynamic placeholder.
+     *
+     * @param plugin  The plugin.
+     * @param pattern The pattern.
+     */
+    protected DynamicPlaceholder(@NotNull final EcoPlugin plugin,
+                                 @NotNull final Pattern pattern) {
+        this.plugin = plugin;
+        this.pattern = pattern;
+    }
+
+    @Override
+    public @NotNull Pattern getPattern() {
+        return pattern;
+    }
+
+    @NotNull
+    @Override
+    public EcoPlugin getPlugin() {
+        return plugin;
+    }
+
+    @Override
+    public String toString() {
+        return "DynamicPlaceholder{" +
+                "plugin='" + plugin + '\'' +
+                "pattern='" + pattern + '\'' +
+                '}';
+    }
+
+    @Override
+    public boolean equals(@NotNull final Object o) {
+        if (this == o) {
+            return true;
+        }
+
+        if (!(o instanceof DynamicPlaceholder that)) {
+            return false;
+        }
+
+        return Objects.equals(pattern, that.getPattern())
+                && Objects.equals(plugin, that.getPlugin());
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(pattern, plugin);
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/placeholder/templates/SimplePlaceholder.java

@@ -74,7 +74,7 @@ public abstract class SimplePlaceholder implements RegistrablePlaceholder {
             return true;
         }
 
-        if (!(o instanceof SimpleInjectablePlaceholder that)) {
+        if (!(o instanceof SimplePlaceholder that)) {
             return false;
         }