main.com.xml.guard.utils.Helper.kt Maven / Gradle / Ivy

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package com.xml.guard.utils

import java.io.File
import java.util.regex.Pattern
import kotlin.random.Random

/**
 * User: ljx
 * Date: 2022/3/22
 * Time: 10:31
 */

private val packageNameBlackList by lazy {
    hashSetOf(
        "in", "is", "as", "if", "do", "by",
        "new", "try", "int", "for", "out", "var", "val", "fun",
        "byte", "void", "this", "else", "case", "open", "enum", "true", "unit", "goto", "null", "char", "todo",
        "false", "inner", "long", "super", "while", "break", "float", "final", "short", "const", "throw", "class", "catch",
        "return", "static", "import", "assert", "inline", "object", "sealed", "vararg", "double", "native",
        "suspend", "reified", "extends", "switch", "public", "throws", "package", "default", "finally", "private", "boolean",
        "continue", "noinline", "lateinit", "internal", "abstract", "strictfp", "volatile",
        "companion", "protected", "interface", "transient",
        "implements", "instanceof", "constructor", "synchronized",
    )
}

private val classNameBlackList by lazy { hashSetOf("R", "BR") }
private val packagePattern by lazy { Pattern.compile("\\s*package\\s+(.*)") }
private val importRPattern by lazy { Pattern.compile("\\s*import\\s+(.*)\\.R;?\$") }

fun String.inClassNameBlackList() = this in classNameBlackList

fun String.inPackageNameBlackList() = this in packageNameBlackList

// 随机生成数（from - until）
fun generateNumbers(
    from: Int = 1,
    until: Int = 26
): Int {
    return Random.nextInt(from, until)
}

//插入 import xx.xx.xx.R  import xx.xx.xx.BuildConfig    语句，
fun File.insertImportXxxIfAbsent(newPackage: String): String {
    val text = readText()
    val importR = "import $newPackage.R"
    val importBR = "import $newPackage.BR"
    val importBuildConfig = "import $newPackage.BuildConfig"
    //如果使用了R类但没有导入，则需要导入
    val importedR = importRPattern.matcher(text).find()
    val needImportR = text.findWord("R.") != -1 && text.findWord(importR) == -1 && !importedR
    //如果使用了BR类但没有导入，则需要导入
    val needImportBR = text.findWord("BR.") != -1 && text.findWord(importBR) == -1
    //如果使用了BuildConfig类但没有导入，则需要导入
    val needImportBuildConfig = text.findWord("BuildConfig.") != -1 &&
            text.findWord(importBuildConfig) == -1

    if (!needImportR && !needImportBR && !needImportBuildConfig) return text

    return insertNeedImport(text) {
        if (needImportR) {
            //import xx.xx.xx.R
            append(importR)
            if (name.endsWith(".java")) {
                append(";")
            }
            append("\n")
        }

        if (needImportBR) {
            //import xx.xx.xx.BR
            append(importBR)
            if (name.endsWith(".java")) {
                append(";")
            }
            append("\n")
        }

        if (needImportBuildConfig) {
            //import xx.xx.xx.BuildConfig
            append(importBuildConfig)
            if (name.endsWith(".java")) {
                append(";")
            }
            append("\n")
        }
    }.also { writeText(it) }
}

// 插入字符串混淆器的路劲
fun File.insertImportStringFog(fogPackage: String): String {
    val text = readText()
    val importFog = "import $fogPackage"
    val needImport = text.findWord(importFog) == -1

    if (!needImport) return text

    return insertNeedImport(text) {
        append(importFog)
        if (name.endsWith(".java")) {
            append(";")
        }
        append("\n")
    }.also { writeText(it) }
}

private fun insertNeedImport(
    text: String,
    block: StringBuilder.() -> Unit
): String {
    val builder = StringBuilder()
    val matcher = packagePattern.matcher(text)
    if (matcher.find()) {
        val packageStatement = matcher.group()
        val packageIndex = text.indexOf(packageStatement)
        if (packageIndex > 0) {
            builder.append(text.substring(0, packageIndex))
        }
        builder.append(text.substring(packageIndex, packageIndex + packageStatement.length))
        builder.append("\n\n")

        builder.apply(block)

        builder.append(text.substring(packageIndex + packageStatement.length))
    }
    return builder.toString()
}