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/*
 * Copyright 2019-2020 Mamoe Technologies and contributors.
 *
 * 此源代码的使用受 GNU AFFERO GENERAL PUBLIC LICENSE version 3 许可证的约束, 可以在以下链接找到该许可证.
 * Use of this source code is governed by the GNU AFFERO GENERAL PUBLIC LICENSE version 3 license that can be found through the following link.
 *
 * https://github.com/mamoe/mirai/blob/master/LICENSE
 */

@file:Suppress("unused")

package net.mamoe.mirai.console.plugin.description

import kotlinx.serialization.KSerializer
import kotlinx.serialization.Serializable
import kotlinx.serialization.builtins.serializer
import net.mamoe.mirai.console.compiler.common.ResolveContext
import net.mamoe.mirai.console.compiler.common.ResolveContext.Kind.PLUGIN_ID
import net.mamoe.mirai.console.compiler.common.ResolveContext.Kind.VERSION_REQUIREMENT
import net.mamoe.mirai.console.internal.data.map
import net.mamoe.mirai.console.util.SemVersion

/**
 * 插件的一个依赖的信息.
 *
 * @see PluginDescription.dependencies
 */
@Serializable(with = PluginDependency.PluginDependencyAsStringSerializer::class)
public data class PluginDependency @JvmOverloads constructor(
    /**
     * 依赖插件 ID, [PluginDescription.id]
     */
    @ResolveContext(PLUGIN_ID) public val id: String,
    /**
     * 依赖版本号. 为 null 时则为不限制版本.
     *
     * 版本遵循 [语义化版本 2.0 规范](https://semver.org/lang/zh-CN/),
     *
     * @see SemVersion.Requirement
     */
    @ResolveContext(VERSION_REQUIREMENT) public val versionRequirement: String? = null,
    /**
     * 若为 `false`, 插件在找不到此依赖时也能正常加载.
     */
    public val isOptional: Boolean = false,
) {
    init {
        kotlin.runCatching {
            PluginDescription.checkPluginId(id)
            if (versionRequirement != null) SemVersion.parseRangeRequirement(versionRequirement)
        }.getOrElse {
            throw IllegalArgumentException(it)
        }
    }

    /**
     * @see PluginDependency
     */
    public constructor(
        @ResolveContext(PLUGIN_ID) id: String,
        isOptional: Boolean = false,
    ) : this(
        id, null, isOptional
    )

    public override fun toString(): String = buildString {
        append(id)
        versionRequirement?.let {
            append(':')
            append(it)
        }
        if (isOptional) {
            append('?')
        }
    }

    public companion object {
        /**
         * 解析 "$id:$versionRequirement?"
         */
        @JvmStatic
        @Throws(IllegalArgumentException::class)
        public fun parseFromString(string: String): PluginDependency {
            require(string.isNotEmpty()) { "string is empty." }
            val optional = string.endsWith('?')
            val (id, version) = string.removeSuffix("?").let { rule ->
                if (rule.contains(':')) {
                    rule.substringBeforeLast(':') to rule.substringAfterLast(':')
                } else {
                    rule to null
                }
            }
            return PluginDependency(id, version, optional)
        }
    }

    public object PluginDependencyAsStringSerializer : KSerializer by String.serializer().map(
        serializer = { it.toString() },
        deserializer = { parseFromString(it) }
    )
}




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