Add custom model predicates

Add regex support

Add and and or predicates

2 files changed, 62 insertions, 2 deletions

diff --git a/src/main/kotlin/moe/nea/firmament/util/filter/IteratorFilterSet.kt b/src/main/kotlin/moe/nea/firmament/util/filter/IteratorFilterSet.kt
new file mode 100644
index 0000000..61d6524
--- /dev/null
+++ b/src/main/kotlin/moe/nea/firmament/util/filter/IteratorFilterSet.kt
@@ -0,0 +1,38 @@
+/*
+ * SPDX-FileCopyrightText: 2024 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+package moe.nea.firmament.util.filter
+
+abstract class IteratorFilterSet<K>(val original: java.util.Set<K>) : java.util.Set<K> by original {
+    abstract fun shouldKeepElement(element: K): Boolean
+
+    override fun iterator(): MutableIterator<K> {
+        val parentIterator = original.iterator()
+        return object : MutableIterator<K> {
+            var lastEntry: K? = null
+            override fun hasNext(): Boolean {
+                while (lastEntry == null) {
+                    if (!parentIterator.hasNext())
+                        break
+                    val element = parentIterator.next()
+                    if (!shouldKeepElement(element)) continue
+                    lastEntry = element
+                }
+                return lastEntry != null
+            }
+
+            override fun next(): K {
+                if (!hasNext()) throw NoSuchElementException()
+                return lastEntry ?: throw NoSuchElementException()
+            }
+
+            override fun remove() {
+                TODO("Not yet implemented")
+            }
+        }
+    }
+}
+
diff --git a/src/main/kotlin/moe/nea/firmament/util/textutil.kt b/src/main/kotlin/moe/nea/firmament/util/textutil.kt
index f811bd8..1d61332 100644
--- a/src/main/kotlin/moe/nea/firmament/util/textutil.kt
+++ b/src/main/kotlin/moe/nea/firmament/util/textutil.kt
@@ -1,5 +1,6 @@
 /*
  * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ * SPDX-FileCopyrightText: 2024 Linnea Gräf <nea@nea.moe>
  *
  * SPDX-License-Identifier: GPL-3.0-or-later
  */
@@ -69,9 +70,30 @@ class TextMatcher(text: Text) {
     }
 }
 
+val formattingChars = "kmolnrKMOLNR".toSet()
+fun CharSequence.removeColorCodes(keepNonColorCodes: Boolean = false): String {
+    var nextParagraph = indexOf('§')
+    if (nextParagraph < 0) return this.toString()
+    val stringBuffer = StringBuilder(this.length)
+    var readIndex = 0
+    while (nextParagraph >= 0) {
+        stringBuffer.append(this, readIndex, nextParagraph)
+        if (keepNonColorCodes && nextParagraph + 1 < length && this[nextParagraph + 1] in formattingChars) {
+            readIndex = nextParagraph
+            nextParagraph = indexOf('§', startIndex = readIndex + 1)
+        } else {
+            readIndex = nextParagraph + 2
+            nextParagraph = indexOf('§', startIndex = readIndex)
+        }
+        if (readIndex > this.length)
+            readIndex = this.length
+    }
+    stringBuffer.append(this, readIndex, this.length)
+    return stringBuffer.toString()
+}
 
-val Text.unformattedString
-    get() = string.replace("§.".toRegex(), "")
+val Text.unformattedString: String
+    get() = string.removeColorCodes().toString()
 
 
 fun Text.transformEachRecursively(function: (Text) -> Text): Text {