diff options
Diffstat (limited to 'libs/utils/src')
3 files changed, 86 insertions, 0 deletions
diff --git a/libs/utils/src/main/java/org/the_jk/cleversync/LiveDataUtils.kt b/libs/utils/src/main/java/org/the_jk/cleversync/LiveDataUtils.kt new file mode 100644 index 0000000..7f6ab1f --- /dev/null +++ b/libs/utils/src/main/java/org/the_jk/cleversync/LiveDataUtils.kt @@ -0,0 +1,14 @@ +package org.the_jk.cleversync + +import androidx.lifecycle.LiveData +import androidx.lifecycle.Observer + +fun <T> LiveData<T>.safeValue(): T? { + if (this.hasActiveObservers()) + return value + var ret: T? = null + val observer = Observer<T> { value -> ret = value } + this.observeForever(observer) + this.removeObserver(observer) + return ret +} diff --git a/libs/utils/src/main/java/org/the_jk/cleversync/StringUtils.kt b/libs/utils/src/main/java/org/the_jk/cleversync/StringUtils.kt new file mode 100644 index 0000000..6adea24 --- /dev/null +++ b/libs/utils/src/main/java/org/the_jk/cleversync/StringUtils.kt @@ -0,0 +1,32 @@ +package org.the_jk.cleversync + +object StringUtils { + fun split(input: String, delimiter: Char, keepEmpty: Boolean = true, limit: Int = 0): List<String> { + return buildList { + var offset = 0 + var count = 0 + while (true) { + val next = input.indexOf(delimiter, offset) + if (next == -1) { + if (keepEmpty || offset < input.length) { + if (limit > 0 && count == limit) { + add("${removeLast()}${delimiter}${input.substring(offset)}") + break + } + add(input.substring(offset)) + } + break + } + if (keepEmpty || offset < next) { + if (limit > 0 && count == limit) { + add("${removeLast()}${delimiter}${input.substring(offset)}") + break + } + add(input.substring(offset, next)) + count++ + } + offset = next + 1 + } + } + } +} diff --git a/libs/utils/src/test/java/org/the_jk/cleversync/StringUtilsTest.kt b/libs/utils/src/test/java/org/the_jk/cleversync/StringUtilsTest.kt new file mode 100644 index 0000000..6a36156 --- /dev/null +++ b/libs/utils/src/test/java/org/the_jk/cleversync/StringUtilsTest.kt @@ -0,0 +1,40 @@ +package org.the_jk.cleversync + +import com.google.common.truth.Truth.assertThat +import org.junit.Test + +class StringUtilsTest { + @Test + fun splitEmpty() { + assertThat(StringUtils.split("", '.', keepEmpty = true)).containsExactly("") + assertThat(StringUtils.split("", '.', keepEmpty = false)).isEmpty() + } + + @Test + fun splitSanity() { + assertThat(StringUtils.split("a.bb.a", '.')).containsExactly("a", "bb", "a").inOrder() + assertThat(StringUtils.split(".a.bb.a", '.', keepEmpty = true)).containsExactly("", "a", "bb", "a").inOrder() + assertThat(StringUtils.split(".a.bb.a", '.', keepEmpty = false)).containsExactly("a", "bb", "a").inOrder() + assertThat(StringUtils.split(".a.bb.a.", '.', keepEmpty = true)) + .containsExactly("", "a", "bb", "a", "").inOrder() + assertThat(StringUtils.split(".a.bb.a.", '.', keepEmpty = false)).containsExactly("a", "bb", "a").inOrder() + } + + @Test + fun splitDouble() { + assertThat(StringUtils.split("foo..bar", '.', keepEmpty = true)).containsExactly("foo", "", "bar").inOrder() + assertThat(StringUtils.split("foo..bar", '.', keepEmpty = false)).containsExactly("foo", "bar").inOrder() + } + + @Test + fun splitLimit() { + assertThat(StringUtils.split("a.bb.a", '.', limit = 1)).containsExactly("a.bb.a") + assertThat(StringUtils.split("a.bb.a", '.', limit = 2)).containsExactly("a", "bb.a").inOrder() + assertThat(StringUtils.split("a.bb.a", '.', limit = 3)).containsExactly("a", "bb", "a").inOrder() + assertThat(StringUtils.split("a.bb.a.", '.', limit = 3, keepEmpty = true)) + .containsExactly("a", "bb", "a.").inOrder() + assertThat(StringUtils.split("a.bb.a.", '.', limit = 3, keepEmpty = false)) + .containsExactly("a", "bb", "a").inOrder() + assertThat(StringUtils.split("a.bb.a", '.', limit = 1000)).containsExactly("a", "bb", "a").inOrder() + } +} |