feat: add energy, pressure, speed unit convertors

CHANGELOG.md

@@ -5,6 +5,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Added
+- Energy unit converter ([#192])
+- Pressure unit converter ([#191])
+- Speed unit converter ([#190])
 
 ### Fixed
 - Fixed issue that occurs after doing a percent operation ([#160])
@@ -64,6 +68,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 [#44]: https://github.com/FossifyOrg/Calculator/issues/44
 [#64]: https://github.com/FossifyOrg/Calculator/issues/64
 [#160]: https://github.com/FossifyOrg/Calculator/issues/160
+[#190]: https://github.com/FossifyOrg/Calculator/issues/190
+[#191]: https://github.com/FossifyOrg/Calculator/issues/191
+[#192]: https://github.com/FossifyOrg/Calculator/issues/192
 
 [Unreleased]: https://github.com/FossifyOrg/Calculator/compare/1.2.0...HEAD
 [1.2.0]: https://github.com/FossifyOrg/Calculator/compare/1.1.0...1.2.0

app/src/main/kotlin/org/fossify/math/helpers/converters/Base.kt

@@ -13,7 +13,10 @@ interface Converter {
             VolumeConverter,
             MassConverter,
             TemperatureConverter,
-            TimeConverter
+            TimeConverter,
+            SpeedConverter,
+            PressureConverter,
+            EnergyConverter
         )
     }
 

app/src/main/kotlin/org/fossify/math/helpers/converters/EnergyConverter.kt

@@ -0,0 +1,144 @@
+package org.fossify.math.helpers.converters
+
+import org.fossify.math.R
+import java.math.BigDecimal
+
+/***
+ * Base unit: joule.
+ *
+ * References:
+ * - https://en.wikipedia.org/wiki/Joule
+ * - https://en.wikipedia.org/wiki/Calorie
+ * - https://en.wikipedia.org/wiki/Kilowatt-hour
+ * - https://en.wikipedia.org/wiki/Electronvolt
+ * - https://en.wikipedia.org/wiki/British_thermal_unit
+ * - https://en.wikipedia.org/wiki/Foot-pound_(energy)
+ * - https://en.wikipedia.org/wiki/Erg
+ * - https://en.wikipedia.org/wiki/Therm
+ */
+object EnergyConverter : Converter {
+    override val nameResId: Int = R.string.unit_energy
+    override val imageResId: Int = R.drawable.ic_energy_vector
+    override val key: String = "EnergyConverter"
+
+    sealed class Unit(nameResId: Int, symbolResId: Int, factor: BigDecimal, key: String) :
+        Converter.Unit(nameResId, symbolResId, factor, key) {
+        data object Joule : Unit(
+            nameResId = R.string.unit_energy_joule,
+            symbolResId = R.string.unit_energy_joule_symbol,
+            factor = BigDecimal.ONE,
+            key = "Joule"
+        )
+
+        data object Kilojoule : Unit(
+            nameResId = R.string.unit_energy_kilojoule,
+            symbolResId = R.string.unit_energy_kilojoule_symbol,
+            factor = BigDecimal("1000"),
+            key = "Kilojoule"
+        )
+
+        data object Megajoule : Unit(
+            nameResId = R.string.unit_energy_megajoule,
+            symbolResId = R.string.unit_energy_megajoule_symbol,
+            factor = BigDecimal("1000000"),
+            key = "Megajoule"
+        )
+
+        data object Gigajoule : Unit(
+            nameResId = R.string.unit_energy_gigajoule,
+            symbolResId = R.string.unit_energy_gigajoule_symbol,
+            factor = BigDecimal("1000000000"),
+            key = "Gigajoule"
+        )
+
+        data object Calorie : Unit(
+            nameResId = R.string.unit_energy_calorie,
+            symbolResId = R.string.unit_energy_calorie_symbol,
+            factor = BigDecimal("4.184"),
+            key = "Calorie"
+        )
+
+        data object Kilocalorie : Unit(
+            nameResId = R.string.unit_energy_kilocalorie,
+            symbolResId = R.string.unit_energy_kilocalorie_symbol,
+            factor = BigDecimal("4184"),
+            key = "Kilocalorie"
+        )
+
+        data object WattHour : Unit(
+            nameResId = R.string.unit_energy_watt_hour,
+            symbolResId = R.string.unit_energy_watt_hour_symbol,
+            factor = BigDecimal("3600"),
+            key = "WattHour"
+        )
+
+        data object KilowattHour : Unit(
+            nameResId = R.string.unit_energy_kilowatt_hour,
+            symbolResId = R.string.unit_energy_kilowatt_hour_symbol,
+            factor = BigDecimal("3600000"),
+            key = "KilowattHour"
+        )
+
+        data object MegawattHour : Unit(
+            nameResId = R.string.unit_energy_megawatt_hour,
+            symbolResId = R.string.unit_energy_megawatt_hour_symbol,
+            factor = BigDecimal("3600000000"),
+            key = "MegawattHour"
+        )
+
+        data object Electronvolt : Unit(
+            nameResId = R.string.unit_energy_electronvolt,
+            symbolResId = R.string.unit_energy_electronvolt_symbol,
+            factor = BigDecimal("1.602176634E-19"),
+            key = "Electronvolt"
+        )
+
+        data object BritishThermalUnit : Unit(
+            nameResId = R.string.unit_energy_btu,
+            symbolResId = R.string.unit_energy_btu_symbol,
+            factor = BigDecimal("1055.05585262"),
+            key = "BritishThermalUnit"
+        )
+
+        data object Therm : Unit(
+            nameResId = R.string.unit_energy_therm,
+            symbolResId = R.string.unit_energy_therm_symbol,
+            factor = BigDecimal("105505585.262"),
+            key = "Therm"
+        )
+
+        data object FootPound : Unit(
+            nameResId = R.string.unit_energy_foot_pound,
+            symbolResId = R.string.unit_energy_foot_pound_symbol,
+            factor = BigDecimal("1.3558179483314004"),
+            key = "FootPound"
+        )
+
+        data object Erg : Unit(
+            nameResId = R.string.unit_energy_erg,
+            symbolResId = R.string.unit_energy_erg_symbol,
+            factor = BigDecimal("0.0000001"),
+            key = "Erg"
+        )
+    }
+
+    override val units: List<Unit> = listOf(
+        Unit.Joule,
+        Unit.Kilojoule,
+        Unit.Megajoule,
+        Unit.Gigajoule,
+        Unit.Calorie,
+        Unit.Kilocalorie,
+        Unit.WattHour,
+        Unit.KilowattHour,
+        Unit.MegawattHour,
+        Unit.Electronvolt,
+        Unit.BritishThermalUnit,
+        Unit.Therm,
+        Unit.FootPound,
+        Unit.Erg,
+    )
+
+    override val defaultTopUnit: Unit = Unit.Kilocalorie
+    override val defaultBottomUnit: Unit = Unit.Kilojoule
+}

app/src/main/kotlin/org/fossify/math/helpers/converters/PressureConverter.kt

@@ -0,0 +1,109 @@
+package org.fossify.math.helpers.converters
+
+import org.fossify.math.R
+import java.math.BigDecimal
+
+/**
+ * Base unit: pascal.
+ *
+ * Main references:
+ * - https://en.wikipedia.org/wiki/Pascal_(unit)
+ * - https://en.wikipedia.org/wiki/Bar_(unit)
+ * - https://en.wikipedia.org/wiki/Atmosphere_(unit)
+ * - https://en.wikipedia.org/wiki/Pounds_per_square_inch
+ * - https://en.wikipedia.org/wiki/Torr
+ * - https://en.wikipedia.org/wiki/Millimetre_of_mercury
+ */
+object PressureConverter : Converter {
+    override val nameResId: Int = R.string.unit_pressure
+    override val imageResId: Int = R.drawable.ic_pressure_vector
+    override val key: String = "PressureConverter"
+
+    sealed class Unit(nameResId: Int, symbolResId: Int, factor: BigDecimal, key: String) :
+        Converter.Unit(nameResId, symbolResId, factor, key) {
+        data object Pascal : Unit(
+            nameResId = R.string.unit_pressure_pascal,
+            symbolResId = R.string.unit_pressure_pascal_symbol,
+            factor = BigDecimal.ONE,
+            key = "Pascal"
+        )
+
+        data object Kilopascal : Unit(
+            nameResId = R.string.unit_pressure_kilopascal,
+            symbolResId = R.string.unit_pressure_kilopascal_symbol,
+            factor = BigDecimal("1000"),
+            key = "Kilopascal"
+        )
+
+        data object Megapascal : Unit(
+            nameResId = R.string.unit_pressure_megapascal,
+            symbolResId = R.string.unit_pressure_megapascal_symbol,
+            factor = BigDecimal("1000000"),
+            key = "Megapascal"
+        )
+
+        data object Bar : Unit(
+            nameResId = R.string.unit_pressure_bar,
+            symbolResId = R.string.unit_pressure_bar_symbol,
+            factor = BigDecimal("100000"),
+            key = "Bar"
+        )
+
+        data object Millibar : Unit(
+            nameResId = R.string.unit_pressure_millibar,
+            symbolResId = R.string.unit_pressure_millibar_symbol,
+            factor = BigDecimal("100"),
+            key = "Millibar"
+        )
+
+        data object Atmosphere : Unit(
+            nameResId = R.string.unit_pressure_atmosphere,
+            symbolResId = R.string.unit_pressure_atmosphere_symbol,
+            factor = BigDecimal("101325"),
+            key = "Atmosphere"
+        )
+
+        data object Psi : Unit(
+            nameResId = R.string.unit_pressure_psi,
+            symbolResId = R.string.unit_pressure_psi_symbol,
+            factor = BigDecimal("6894.757293168"),
+            key = "Psi"
+        )
+
+        data object Torr : Unit(
+            nameResId = R.string.unit_pressure_torr,
+            symbolResId = R.string.unit_pressure_torr_symbol,
+            factor = BigDecimal("133.32236842105"),
+            key = "Torr"
+        )
+
+        data object MillimeterOfMercury : Unit(
+            nameResId = R.string.unit_pressure_mmhg,
+            symbolResId = R.string.unit_pressure_mmhg_symbol,
+            factor = BigDecimal("133.322387415"),
+            key = "MillimeterOfMercury"
+        )
+
+        data object InchOfMercury : Unit(
+            nameResId = R.string.unit_pressure_inhg,
+            symbolResId = R.string.unit_pressure_inhg_symbol,
+            factor = BigDecimal("3386.389"),
+            key = "InchOfMercury"
+        )
+    }
+
+    override val units: List<Unit> = listOf(
+        Unit.Pascal,
+        Unit.Kilopascal,
+        Unit.Megapascal,
+        Unit.Bar,
+        Unit.Millibar,
+        Unit.Atmosphere,
+        Unit.Psi,
+        Unit.Torr,
+        Unit.MillimeterOfMercury,
+        Unit.InchOfMercury
+    )
+    override val defaultTopUnit: Unit = Unit.Bar
+    override val defaultBottomUnit: Unit = Unit.Psi
+}

app/src/main/kotlin/org/fossify/math/helpers/converters/SpeedConverter.kt

@@ -0,0 +1,95 @@
+package org.fossify.math.helpers.converters
+
+import org.fossify.commons.helpers.HOUR_SECONDS
+import org.fossify.math.R
+import org.fossify.math.helpers.MATH_CONTEXT
+import java.math.BigDecimal
+
+/**
+ * Base unit: meter per second.
+ *
+ * Main references:
+ * - https://en.wikipedia.org/wiki/Metre_per_second
+ * - https://en.wikipedia.org/wiki/Kilometres_per_hour
+ * - https://en.wikipedia.org/wiki/Miles_per_hour
+ * - https://en.wikipedia.org/wiki/Knot_(unit)
+ * - https://en.wikipedia.org/wiki/Mach_number
+ * - https://en.wikipedia.org/wiki/Speed_of_light
+ */
+object SpeedConverter : Converter {
+    override val nameResId: Int = R.string.unit_speed
+    override val imageResId: Int = R.drawable.ic_speed_vector
+    override val key: String = "SpeedConverter"
+
+    sealed class Unit(nameResId: Int, symbolResId: Int, factor: BigDecimal, key: String) :
+        Converter.Unit(nameResId, symbolResId, factor, key) {
+        data object MeterPerSecond : Unit(
+            nameResId = R.string.unit_speed_meter_per_second,
+            symbolResId = R.string.unit_speed_meter_per_second_symbol,
+            factor = BigDecimal.ONE,
+            key = "MeterPerSecond"
+        )
+
+        data object KilometerPerSecond : Unit(
+            nameResId = R.string.unit_speed_kilometer_per_second,
+            symbolResId = R.string.unit_speed_kilometer_per_second_symbol,
+            factor = BigDecimal("1000"),
+            key = "KilometerPerSecond"
+        )
+
+        data object KilometerPerHour : Unit(
+            nameResId = R.string.unit_speed_kilometer_per_hour,
+            symbolResId = R.string.unit_speed_kilometer_per_hour_symbol,
+            factor = BigDecimal("1000").divide(BigDecimal("3600"), MATH_CONTEXT),
+            key = "KilometerPerHour"
+        )
+
+        data object MilePerHour : Unit(
+            nameResId = R.string.unit_speed_mile_per_hour,
+            symbolResId = R.string.unit_speed_mile_per_hour_symbol,
+            factor = BigDecimal("0.44704"),
+            key = "MilePerHour"
+        )
+
+        data object Knot : Unit(
+            nameResId = R.string.unit_speed_knot,
+            symbolResId = R.string.unit_speed_knot_symbol,
+            factor = BigDecimal("1852").divide(BigDecimal("3600"), MATH_CONTEXT),
+            key = "Knot"
+        )
+
+        data object FootPerSecond : Unit(
+            nameResId = R.string.unit_speed_foot_per_second,
+            symbolResId = R.string.unit_speed_foot_per_second_symbol,
+            factor = BigDecimal("0.3048"),
+            key = "FootPerSecond"
+        )
+
+        data object Mach : Unit(
+            nameResId = R.string.unit_speed_mach,
+            symbolResId = R.string.unit_speed_mach_symbol,
+            factor = BigDecimal("340.27"), // ISA: dry air, 15 °C, sea level
+            key = "Mach"
+        )
+
+        data object SpeedOfLight : Unit(
+            nameResId = R.string.unit_speed_speed_of_light,
+            symbolResId = R.string.unit_speed_speed_of_light_symbol,
+            factor = BigDecimal("299792458"),
+            key = "SpeedOfLight"
+        )
+    }
+
+    override val units: List<Unit> = listOf(
+        Unit.MeterPerSecond,
+        Unit.KilometerPerSecond,
+        Unit.KilometerPerHour,
+        Unit.MilePerHour,
+        Unit.Knot,
+        Unit.FootPerSecond,
+        Unit.Mach,
+        Unit.SpeedOfLight
+    )
+    override val defaultTopUnit: Unit = Unit.KilometerPerHour
+    override val defaultBottomUnit: Unit = Unit.MilePerHour
+}

app/src/main/res/drawable/ic_energy_vector.xml

@@ -0,0 +1,3 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:width="24dp" android:height="24dp" android:viewportWidth="960" android:viewportHeight="960">
+    <path android:pathData="M422 728l207-248H469l29-227-185 267h139l-30 208zm-62-128H236q-24 0-35.5-21.5T203 537l299-430q10-14 26-19.5t33 0.5q17 6 25 21t6 32l-32 259h155q26 0 36.5 23t-6.5 43L416 860q-11 13-27 17t-31-3q-15-7-23.5-21.5T328 821l32-221zm111-110z" android:fillColor="#FFFFFF"/>
+</vector>

app/src/main/res/drawable/ic_pressure_vector.xml

@@ -0,0 +1,3 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:width="24dp" android:height="24dp" android:viewportWidth="960" android:viewportHeight="960">
+    <path android:pathData="M732 308q-5-5-8.5-12.5T720 280q0-11 6-19.5t15-15.5q14-11 31-17t34-11q4-1 8-1t7 3q4 4 2 15-5 17-11 34t-17 31q-7 9-15.5 15t-19.5 6q-8 0-15.5-3.5T732 308zM160 840q-33 0-56.5-23.5T80 760V200q0-33 23.5-56.5T160 120h240q33 0 56.5 23.5T480 200v327q9-3 19-5t21-2q50 0 85 35t35 85v80q0 17 11.5 28.5T680 760q17 0 28.5-11.5T720 720V520h-40v-57q-54-23-87-72t-33-111q0-83 58.5-141.5T760 80q83 0 141.5 58.5T960 280q0 62-33 111t-87 72v57h-40v200q0 50-35 85t-85 35q-50 0-85-35t-35-85v-80q0-17-11.5-28.5T520 600q-17 0-28.5 11.5T480 640v120q0 33-23.5 56.5T400 840H160zm600-440q50 0 85-35t35-85q0-50-35-85t-85-35q-50 0-85 35t-35 85q0 50 35 85t85 35zM160 760h240v-80l-32 32q-14 14-29.5 12.5T312 712q-11-11-12.5-27t12.5-30l88-88v-87l-32 32q-14 14-29.5 12.5T312 512q-11-11-12.5-27t12.5-30l88-88v-87l-32 32q-14 14-29.5 12.5T312 312q-11-11-12.5-27t12.5-30l55-55H193l55 55q14 14 12.5 29.5T248 311q-11 11-26.5 13T192 312l-32-32v87l88 88q14 14 12.5 29.5T248 511q-11 11-26.5 13T192 512l-32-32v87l88 88q14 14 12.5 29.5T248 711q-11 11-26.5 13T192 712l-32-32v80zm120-280z" android:fillColor="#FFFFFF"/>
+</vector>

app/src/main/res/drawable/ic_speed_vector.xml

@@ -0,0 +1,3 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:width="24dp" android:height="24dp" android:viewportWidth="960" android:viewportHeight="960">
+    <path android:pathData="M418 620q24 24 62 23.5t56-27.5l169-253q9-14-2.5-25.5T677 335L424 504q-27 18-28.5 55t22.5 61zm62-460q36 0 71 6t68 19q16 6 34 22.5t10 31.5q-8 15-36 20t-45-1q-25-9-50.5-13.5T480 240q-133 0-226.5 93.5T160 560q0 42 11.5 83t32.5 77h552q23-38 33.5-79t10.5-85q0-26-4.5-51T782 456q-6-17-2-33t18-27q13-10 28.5-6t21.5 18q15 35 23 71.5t9 74.5q1 57-13 109t-41 99q-11 18-30 28t-40 10H204q-21 0-40-10t-30-28q-26-45-40-95.5T80 560q0-83 31.5-155.5t86-127Q252 223 325 191.5T480 160zm7 313z" android:fillColor="#FFFFFF"/>
+</vector>