From 051e4df9e4061189e5f4d73b12deb88149a14f73 Mon Sep 17 00:00:00 2001
From: Janne Mareike Koschinski <janne@kuschku.de>
Date: Thu, 3 Mar 2022 19:14:44 +0100
Subject: [PATCH] feat: implement string joiner
---
.../util/backport/StringJoiner.kt | 39 +++++++++++++++++++
.../util/extensions/StringJoinerExtensions.kt | 12 ++++++
2 files changed, 51 insertions(+)
create mode 100644 app/src/main/kotlin/de/justjanne/quasseldroid/util/backport/StringJoiner.kt
create mode 100644 app/src/main/kotlin/de/justjanne/quasseldroid/util/extensions/StringJoinerExtensions.kt
diff --git a/app/src/main/kotlin/de/justjanne/quasseldroid/util/backport/StringJoiner.kt b/app/src/main/kotlin/de/justjanne/quasseldroid/util/backport/StringJoiner.kt
new file mode 100644
index 000000000..20d737f30
--- /dev/null
+++ b/app/src/main/kotlin/de/justjanne/quasseldroid/util/backport/StringJoiner.kt
@@ -0,0 +1,39 @@
+package de.justjanne.quasseldroid.util.backport
+
+import java.io.Serializable
+
+class StringJoiner(
+ private val delimiter: String,
+ private val prefix: String = "",
+ private val suffix: String = ""
+) : Serializable, Appendable {
+ private val builder = StringBuilder()
+
+ override fun append(data: CharSequence?, start: Int, end: Int): StringJoiner =
+ this.apply { prepareBuilder().append(data, start, end) }
+
+ override fun append(data: CharSequence?): StringJoiner =
+ this.apply { prepareBuilder().append(data) }
+
+ override fun append(data: Char): StringJoiner =
+ this.apply { prepareBuilder().append(data) }
+
+ private fun prepareBuilder(): StringBuilder = builder.apply {
+ append(if (isEmpty()) prefix else delimiter)
+ }
+
+ override fun toString(): String =
+ if (builder.isEmpty()) {
+ prefix + suffix
+ } else {
+ val length = builder.length
+ builder.append(suffix)
+ val result = builder.toString()
+ builder.setLength(length)
+ result
+ }
+
+ fun length(): Int =
+ if (builder.isEmpty()) prefix.length + suffix.length
+ else builder.length + suffix.length
+}
diff --git a/app/src/main/kotlin/de/justjanne/quasseldroid/util/extensions/StringJoinerExtensions.kt b/app/src/main/kotlin/de/justjanne/quasseldroid/util/extensions/StringJoinerExtensions.kt
new file mode 100644
index 000000000..c5d8ac51b
--- /dev/null
+++ b/app/src/main/kotlin/de/justjanne/quasseldroid/util/extensions/StringJoinerExtensions.kt
@@ -0,0 +1,12 @@
+package de.justjanne.quasseldroid.util.extensions
+
+import de.justjanne.quasseldroid.util.backport.StringJoiner
+
+inline fun joinString(
+ delimiter: String = "",
+ prefix: String = "",
+ suffix: String = "",
+ builderAction: StringJoiner.() -> Unit
+): String {
+ return StringJoiner(delimiter, prefix, suffix).apply(builderAction).toString()
+}
--
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