Make Chargepoint.power nullable

Not all data sources provide power for all connectors (e.g.
OpenChargeMap and OpenStreetMap don't always). Even without the power
level, knowing what connectors there are is still useful.

app/src/main/java/net/vonforst/evmap/api/availability/AvailabilityDetector.kt

@@ -86,7 +86,7 @@ abstract class BaseAvailabilityDetector(private val client: OkHttpClient) : Avai
                 // find corresponding powers in GE data
                 val gePowers =
                     chargepoints.filter { equivalentPlugTypes(it.type).any { it == type } }
-                        .map { it.power }.distinct().sorted()
+                        .mapNotNull { it.power }.distinct().sorted()
 
                 // if the distinct number of powers is the same, try to match.
                 if (powers.size == gePowers.size) {
@@ -131,7 +131,7 @@ data class ChargeLocationStatus(
             (connectors == null || connectors.map {
                 equivalentPlugTypes(it)
             }.any { equivalent -> it.type in equivalent })
-                    && (minPower == null || it.power > minPower)
+                    && (minPower == null || (it.power != null && it.power > minPower))
         }
         return this.copy(status = statusFiltered)
     }

app/src/main/java/net/vonforst/evmap/api/chargeprice/ChargepriceModel.kt

@@ -48,11 +48,9 @@ data class ChargepriceStation(
                 charger.coordinates.lat,
                 charger.chargepriceData.country,
                 charger.chargepriceData.network,
-                charger.chargepoints.zip(plugTypes).filter {
-                    equivalentPlugTypes(it.first.type).any { it in compatibleConnectors }
-                }.map {
-                    ChargepriceChargepoint(it.first.power, it.second)
-                }
+                charger.chargepoints.zip(plugTypes)
+                    .filter { equivalentPlugTypes(it.first.type).any { it in compatibleConnectors } }
+                    .map { ChargepriceChargepoint(it.first.power ?: 0.0, it.second) }
             )
         }
     }

app/src/main/java/net/vonforst/evmap/api/openchargemap/OpenChargeMapModel.kt

@@ -141,7 +141,7 @@ data class OCMConnection(
 ) {
     fun convert(refData: OCMReferenceData) = Chargepoint(
         convertConnectionTypeFromOCM(connectionTypeId, refData),
-        power ?: 0.0,
+        power,
         quantity ?: 1
     )
 

app/src/main/java/net/vonforst/evmap/model/ChargersModel.kt

@@ -64,7 +64,7 @@ data class ChargeLocation(
     /**
      * maximum power available from this charger.
      */
-    val maxPower: Double
+    val maxPower: Double?
         get() {
             return maxPower()
         }
@@ -72,17 +72,20 @@ data class ChargeLocation(
     /**
      * Gets the maximum power available from certain connectors of this charger.
      */
-    fun maxPower(connectors: Set<String>? = null): Double {
-        return chargepoints.filter { connectors?.contains(it.type) ?: true }
-            .map { it.power }.maxOrNull() ?: 0.0
+    fun maxPower(connectors: Set<String>? = null): Double? {
+        return chargepoints
+            .filter { connectors?.contains(it.type) ?: true }
+            .mapNotNull { it.power }
+            .maxOrNull()
     }
 
     fun isMulti(filteredConnectors: Set<String>? = null): Boolean {
         var chargepoints = chargepointsMerged
             .filter { filteredConnectors?.contains(it.type) ?: true }
-        if (maxPower(filteredConnectors) >= 43) {
+        val chargepointMaxPower = maxPower(filteredConnectors)
+        if (chargepointMaxPower != null && chargepointMaxPower >= 43) {
             // fast charger -> only count fast chargers
-            chargepoints = chargepoints.filter { it.power >= 43 }
+            chargepoints = chargepoints.filter {it.power != null && it.power >= 43 }
         }
         val connectors = chargepoints.map { it.type }.distinct().toSet()
 
@@ -306,9 +309,24 @@ data class Address(
 
 @Parcelize
 @JsonClass(generateAdapter = true)
-data class Chargepoint(val type: String, val power: Double, val count: Int) : Equatable,
-    Parcelable {
-    fun formatPower(): String {
+data class Chargepoint(
+    // The chargepoint type (use one of the constants in the companion object)
+    val type: String,
+    // Power in kW (or null if unknown)
+    val power: Double?,
+    // How many instances of this plug/socket are available?
+    val count: Int,
+) : Equatable, Parcelable {
+    fun hasKnownPower(): Boolean = power != null
+
+    /**
+     * If chargepoint power is defined, format it into a string.
+     * Otherwise, return null.
+     */
+    fun formatPower(): String? {
+        if (power == null) {
+            return null
+        }
         val powerFmt = if (power - power.toInt() == 0.0) {
             "%.0f".format(power)
         } else {

app/src/main/java/net/vonforst/evmap/ui/MarkerUtils.kt

@@ -13,12 +13,16 @@ import kotlin.math.max
 fun getMarkerTint(
     charger: ChargeLocation,
     connectors: Set<String>? = null
-): Int = when {
-    charger.maxPower(connectors) >= 100 -> R.color.charger_100kw
-    charger.maxPower(connectors) >= 43 -> R.color.charger_43kw
-    charger.maxPower(connectors) >= 20 -> R.color.charger_20kw
-    charger.maxPower(connectors) >= 11 -> R.color.charger_11kw
-    else -> R.color.charger_low
+): Int {
+    val maxPower = charger.maxPower(connectors)
+    return when {
+        maxPower == null -> R.color.charger_low
+        maxPower >= 100 -> R.color.charger_100kw
+        maxPower >= 43 -> R.color.charger_43kw
+        maxPower >= 20 -> R.color.charger_20kw
+        maxPower >= 11 -> R.color.charger_11kw
+        else -> R.color.charger_low
+    }
 }
 
 class MarkerAnimator(val gen: ChargerIconGenerator) {