1 files changed, 0 insertions, 198 deletions
diff --git a/taler-kotlin-common/src/commonMain/kotlin/net/taler/common/Amount.kt b/taler-kotlin-common/src/commonMain/kotlin/net/taler/common/Amount.kt
deleted file mode 100644
index 84d10c5..0000000
--- a/taler-kotlin-common/src/commonMain/kotlin/net/taler/common/Amount.kt
+++ /dev/null
@@ -1,198 +0,0 @@
-/*
- * This file is part of GNU Taler
- * (C) 2020 Taler Systems S.A.
- *
- * GNU Taler is free software; you can redistribute it and/or modify it under the
- * terms of the GNU General Public License as published by the Free Software
- * Foundation; either version 3, or (at your option) any later version.
- *
- * GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
- * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
- * A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
- */
-
-package net.taler.common
-
-import kotlinx.serialization.Decoder
-import kotlinx.serialization.Encoder
-import kotlinx.serialization.KSerializer
-import kotlinx.serialization.Serializable
-import kotlinx.serialization.Serializer
-import kotlin.math.floor
-import kotlin.math.pow
-import kotlin.math.roundToInt
-
-class AmountParserException(msg: String? = null, cause: Throwable? = null) : Exception(msg, cause)
-class AmountOverflowException(msg: String? = null, cause: Throwable? = null) : Exception(msg, cause)
-
-@Serializable(with = KotlinXAmountSerializer::class)
-data class Amount(
-    /**
-     * name of the currency using either a three-character ISO 4217 currency code,
-     * or a regional currency identifier starting with a "*" followed by at most 10 characters.
-     * ISO 4217 exponents in the name are not supported,
-     * although the "fraction" is corresponds to an ISO 4217 exponent of 6.
-     */
-    val currency: String,
-
-    /**
-     * The integer part may be at most 2^52.
-     * Note that "1" here would correspond to 1 EUR or 1 USD, depending on currency, not 1 cent.
-     */
-    val value: Long,
-
-    /**
-     * Unsigned 32 bit fractional value to be added to value representing
-     * an additional currency fraction, in units of one hundred millionth (1e-8)
-     * of the base currency value.  For example, a fraction
-     * of 50_000_000 would correspond to 50 cents.
-     */
-    val fraction: Int
-) : Comparable<Amount> {
-
-    companion object {
-
-        private const val FRACTIONAL_BASE: Int = 100000000 // 1e8
-
-        private val REGEX_CURRENCY = Regex("""^[-_*A-Za-z0-9]{1,12}$""")
-        val MAX_VALUE = 2.0.pow(52).toLong()
-        private const val MAX_FRACTION_LENGTH = 8
-        const val MAX_FRACTION = 99_999_999
-
-        fun zero(currency: String): Amount {
-            return Amount(checkCurrency(currency), 0, 0)
-        }
-
-        fun fromJSONString(str: String): Amount {
-            val split = str.split(":")
-            if (split.size != 2) throw AmountParserException("Invalid Amount Format")
-            return fromString(split[0], split[1])
-        }
-
-        fun fromString(currency: String, str: String): Amount {
-            // value
-            val valueSplit = str.split(".")
-            val value = checkValue(valueSplit[0].toLongOrNull())
-            // fraction
-            val fraction: Int = if (valueSplit.size > 1) {
-                val fractionStr = valueSplit[1]
-                if (fractionStr.length > MAX_FRACTION_LENGTH)
-                    throw AmountParserException("Fraction $fractionStr too long")
-                val fraction = "0.$fractionStr".toDoubleOrNull()
-                    ?.times(FRACTIONAL_BASE)
-                    ?.roundToInt()
-                checkFraction(fraction)
-            } else 0
-            return Amount(checkCurrency(currency), value, fraction)
-        }
-
-        fun min(currency: String): Amount = Amount(currency, 0, 1)
-        fun max(currency: String): Amount = Amount(currency, MAX_VALUE, MAX_FRACTION)
-
-
-        internal fun checkCurrency(currency: String): String {
-            if (!REGEX_CURRENCY.matches(currency))
-                throw AmountParserException("Invalid currency: $currency")
-            return currency
-        }
-
-        internal fun checkValue(value: Long?): Long {
-            if (value == null || value > MAX_VALUE)
-                throw AmountParserException("Value $value greater than $MAX_VALUE")
-            return value
-        }
-
-        internal fun checkFraction(fraction: Int?): Int {
-            if (fraction == null || fraction > MAX_FRACTION)
-                throw AmountParserException("Fraction $fraction greater than $MAX_FRACTION")
-            return fraction
-        }
-
-    }
-
-    val amountStr: String
-        get() = if (fraction == 0) "$value" else {
-            var f = fraction
-            var fractionStr = ""
-            while (f > 0) {
-                fractionStr += f / (FRACTIONAL_BASE / 10)
-                f = (f * 10) % FRACTIONAL_BASE
-            }
-            "$value.$fractionStr"
-        }
-
-    operator fun plus(other: Amount): Amount {
-        check(currency == other.currency) { "Can only subtract from same currency" }
-        val resultValue = value + other.value + floor((fraction + other.fraction).toDouble() / FRACTIONAL_BASE).toLong()
-        if (resultValue > MAX_VALUE)
-            throw AmountOverflowException()
-        val resultFraction = (fraction + other.fraction) % FRACTIONAL_BASE
-        return Amount(currency, resultValue, resultFraction)
-    }
-
-    operator fun times(factor: Int): Amount {
-        // TODO consider replacing with a faster implementation
-        if (factor == 0) return zero(currency)
-        var result = this
-        for (i in 1 until factor) result += this
-        return result
-    }
-
-    operator fun minus(other: Amount): Amount {
-        check(currency == other.currency) { "Can only subtract from same currency" }
-        var resultValue = value
-        var resultFraction = fraction
-        if (resultFraction < other.fraction) {
-            if (resultValue < 1L)
-                throw AmountOverflowException()
-            resultValue--
-            resultFraction += FRACTIONAL_BASE
-        }
-        check(resultFraction >= other.fraction)
-        resultFraction -= other.fraction
-        if (resultValue < other.value)
-            throw AmountOverflowException()
-        resultValue -= other.value
-        return Amount(currency, resultValue, resultFraction)
-    }
-
-    fun isZero(): Boolean {
-        return value == 0L && fraction == 0
-    }
-
-    fun toJSONString(): String {
-        return "$currency:$amountStr"
-    }
-
-    override fun toString(): String {
-        return "$amountStr $currency"
-    }
-
-    override fun compareTo(other: Amount): Int {
-        check(currency == other.currency) { "Can only compare amounts with the same currency" }
-        when {
-            value == other.value -> {
-                if (fraction < other.fraction) return -1
-                if (fraction > other.fraction) return 1
-                return 0
-            }
-            value < other.value -> return -1
-            else -> return 1
-        }
-    }
-
-}
-
-@Serializer(forClass = Amount::class)
-object KotlinXAmountSerializer: KSerializer<Amount> {
-    override fun serialize(encoder: Encoder, value: Amount) {
-        encoder.encodeString(value.toJSONString())
-    }
-
-    override fun deserialize(decoder: Decoder): Amount {
-        return Amount.fromJSONString(decoder.decodeString())
-    }
-}