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feat: Add function to get the most common compatible version
This adds a function to get the version that is most common for a given package name in a supplied set of patches.
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28 changes: 28 additions & 0 deletions
28
revanced-lib/src/main/kotlin/app/revanced/lib/PatchUtils.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,28 @@ | ||
| package app.revanced.lib | ||
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| import app.revanced.patcher.PatchSet | ||
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| /** | ||
| * Utility functions for working with patches. | ||
| */ | ||
| @Suppress("MemberVisibilityCanBePrivate", "unused") | ||
| object PatchUtils { | ||
| /** | ||
| * Get the version that is most common for [packageName] in the supplied set of [patches]. | ||
| * | ||
| * @param patches The set of patches to check. | ||
| * @param packageName The name of the compatible package. | ||
| * @return The most common version of. | ||
| */ | ||
| fun getMostCommonCompatibleVersion(patches: PatchSet, packageName: String) = patches | ||
| .mapNotNull { | ||
| // Map all patches to their compatible packages with version constraints. | ||
| it.compatiblePackages?.firstOrNull { compatiblePackage -> | ||
| compatiblePackage.name == packageName && compatiblePackage.versions?.isNotEmpty() == true | ||
| } | ||
| } | ||
| .flatMap { it.versions!! } | ||
| .groupingBy { it } | ||
| .eachCount() | ||
| .maxByOrNull { it.value }?.key | ||
| } |
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50
revanced-lib/src/test/kotlin/app/revanced/lib/PatchUtilsTest.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,50 @@ | ||
| package app.revanced.lib | ||
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| import app.revanced.patcher.PatchSet | ||
| import app.revanced.patcher.data.BytecodeContext | ||
| import app.revanced.patcher.patch.BytecodePatch | ||
| import org.junit.jupiter.api.Test | ||
| import kotlin.test.assertEquals | ||
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| internal object PatchUtilsTest { | ||
| @Test | ||
| fun `return 'a' because it is the most common version`() { | ||
| val patches = arrayOf("a", "a", "c", "d", "a", "b", "c", "d", "a", "b", "c", "d") | ||
| .map { version -> newPatch("some.package", version) } | ||
| .toSet() | ||
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| assertEqualsVersion("a", patches, "some.package") | ||
| } | ||
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| @Test | ||
| fun `return null because no patches were supplied`() { | ||
| assertEqualsVersion(null, emptySet<BytecodePatch>(), "some.package") | ||
| } | ||
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| @Test | ||
| fun `return null because no patch is compatible with the supplied package name`() { | ||
| val patches = setOf(newPatch("other.package", "a")) | ||
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| assertEqualsVersion(null, patches, "other.package") | ||
| } | ||
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| @Test | ||
| fun `return null because no patch compatible package is constrained to a version`() { | ||
| val patches = setOf( | ||
| newPatch("other.package"), | ||
| newPatch("other.package"), | ||
| ) | ||
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| assertEqualsVersion(null, patches, "other.package") | ||
| } | ||
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| private fun assertEqualsVersion( | ||
| expected: String?, patches: PatchSet, compatiblePackageName: String | ||
| ) = assertEquals(expected, PatchUtils.getMostCommonCompatibleVersion(patches, compatiblePackageName)) | ||
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| private fun newPatch(packageName: String, vararg versions: String) = object : BytecodePatch( | ||
| compatiblePackages = setOf(CompatiblePackage(packageName, versions.toSet())) | ||
| ) { | ||
| override fun execute(context: BytecodeContext) {} | ||
| } | ||
| } |