com.yandex.div.evaluable.function.ToString.kt Maven / Gradle / Ivy

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DivKit is an open source Server-Driven UI (SDUI) framework. SDUI is a an emerging technique that leverage the server to build the user interfaces of their mobile app.

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package com.yandex.div.evaluable.function

import com.yandex.div.evaluable.EvaluableType
import com.yandex.div.evaluable.EvaluationContext
import com.yandex.div.evaluable.ExpressionContext
import com.yandex.div.evaluable.Function
import com.yandex.div.evaluable.FunctionArgument
import com.yandex.div.evaluable.types.Color
import com.yandex.div.evaluable.types.Url

private const val FUNCTION_NAME = "toString"

internal object IntegerToString : Function() {

    override val name = FUNCTION_NAME

    override val declaredArgs = listOf(FunctionArgument(type = EvaluableType.INTEGER))

    override val resultType = EvaluableType.STRING

    override val isPure = true

    override fun evaluate(
        evaluationContext: EvaluationContext,
        expressionContext: ExpressionContext,
        args: List
    ): Any {
        val integerValue = args.first() as Long
        return integerValue.toString()
    }
}

internal object NumberToString : Function() {

    override val name = FUNCTION_NAME

    override val declaredArgs = listOf(FunctionArgument(type = EvaluableType.NUMBER))

    override val resultType = EvaluableType.STRING

    override val isPure = true

    override fun evaluate(
        evaluationContext: EvaluationContext,
        expressionContext: ExpressionContext,
        args: List
    ): Any {
        val numberValue = args.first() as Double
        return numberValue.toString()
    }
}

internal object BooleanToString : Function() {

    override val name = FUNCTION_NAME

    override val declaredArgs = listOf(FunctionArgument(type = EvaluableType.BOOLEAN))

    override val resultType = EvaluableType.STRING

    override val isPure = true

    override fun evaluate(
        evaluationContext: EvaluationContext,
        expressionContext: ExpressionContext,
        args: List
    ): Any {
        val booleanValue = args.first() as Boolean
        return if (booleanValue) "true" else "false"
    }
}

internal object ColorToString : Function() {

    override val name = FUNCTION_NAME

    override val declaredArgs = listOf(FunctionArgument(type = EvaluableType.COLOR))

    override val resultType = EvaluableType.STRING

    override val isPure = true

    override fun evaluate(
        evaluationContext: EvaluationContext,
        expressionContext: ExpressionContext,
        args: List
    ): Any {
        return (args.first() as Color).toString()
    }
}

internal object UrlToString : Function() {

    override val name = FUNCTION_NAME

    override val declaredArgs = listOf(FunctionArgument(type = EvaluableType.URL))

    override val resultType = EvaluableType.STRING

    override val isPure = true

    override fun evaluate(
        evaluationContext: EvaluationContext,
        expressionContext: ExpressionContext,
        args: List
    ): Any {
        return (args.first() as Url).toString()
    }
}

internal object StringToString : Function() {

    override val name = FUNCTION_NAME

    override val declaredArgs = listOf(FunctionArgument(type = EvaluableType.STRING))

    override val resultType = EvaluableType.STRING

    override val isPure = true

    override fun evaluate(
        evaluationContext: EvaluationContext,
        expressionContext: ExpressionContext,
        args: List
    ): Any {
        return (args.first() as String)
    }
}