Initial commit

2021-09-18 23:37:52 +02:00
commit 749e4e3073
938 changed files with 50475 additions and 0 deletions
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+<manifest package="de.mm20.launcher2.currencies">
+
+</manifest>
@@ -0,0 +1,19 @@
+package de.mm20.launcher2.currencies
+
+import de.mm20.launcher2.database.entities.CurrencyEntity
+
+data class Currency(
+        val symbol: String,
+        val value: Double,
+        val lastUpdate: Long
+) {
+    constructor(entity: CurrencyEntity) : this(
+            symbol = entity.symbol,
+            value = entity.value,
+            lastUpdate = entity.lastUpdate
+    )
+
+    fun toDatabaseEntity(): CurrencyEntity {
+        return CurrencyEntity(symbol, value, lastUpdate)
+    }
+}
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+package de.mm20.launcher2.currencies
+
+import android.content.Context
+import android.util.Log
+import androidx.work.*
+import de.mm20.launcher2.database.AppDatabase
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import java.util.concurrent.TimeUnit
+
+class CurrencyRepository(val context: Context) {
+
+    init {
+        val currencyWorker = PeriodicWorkRequest.Builder(ExchangeRateWorker::class.java, 60, TimeUnit.MINUTES)
+                .build()
+        WorkManager.getInstance().enqueueUniquePeriodicWork("ExchangeRates",
+                ExistingPeriodicWorkPolicy.REPLACE, currencyWorker)
+    }
+
+    suspend fun convertCurrency(fromCurrency: String, value: Double, toCurrency: String? = null): List<Pair<String, Double>> {
+
+        return withContext<List<Pair<String, Double>>>(Dispatchers.IO) {
+            val dao = AppDatabase.getInstance(context)
+                    .currencyDao()
+
+            val from = Currency(dao.getCurrency(fromCurrency) ?: return@withContext emptyList())
+
+            return@withContext if (toCurrency == null) {
+                dao.getAllCurrencies().mapNotNull {
+                    val to = Currency(it)
+                    if (from.lastUpdate != to.lastUpdate) {
+                        Log.w("MM20", "Exchange rate update dates do not match: $fromCurrency, $it")
+                        return@mapNotNull null
+                    }
+                    if (from.symbol == to.symbol) return@mapNotNull null
+                    to.symbol to value * to.value / from.value
+                }
+            } else {
+                val to = Currency(dao.getCurrency(toCurrency) ?: return@withContext emptyList())
+                if (from.lastUpdate != to.lastUpdate) {
+                    Log.w("MM20", "Exchange rate update dates do not match: $fromCurrency, $toCurrency")
+                    return@withContext emptyList()
+                }
+                listOf(toCurrency to value * to.value / from.value)
+            }
+        }
+    }
+
+    fun getFlag(currencySymbol: String): String {
+        return when (currencySymbol) {
+            "EUR" -> "\uD83C\uDDEA\uD83C\uDDFA" // European Union
+            "USD" -> "\uD83C\uDDFA\uD83C\uDDF8" // United States
+            "JPY" -> "\uD83C\uDDEF\uD83C\uDDF5" // Japan
+            "GBP" -> "\uD83C\uDDEC\uD83C\uDDE7" // United Kingdom
+            "AUD" -> "\uD83C\uDDE6\uD83C\uDDFA" // Australia
+            "CAD" -> "\uD83C\uDDE8\uD83C\uDDE6" // Canada
+            "CHF" -> "\uD83C\uDDE8\uD83C\uDDED" // Switzerland
+            "CNY" -> "\uD83C\uDDE8\uD83C\uDDF3" // China
+            "SEK" -> "\uD83C\uDDF8\uD83C\uDDEA" // Sweden
+            "NZD" -> "\uD83C\uDDF3\uD83C\uDDFF" // New Zealand
+
+            "HKD" -> "\uD83C\uDDED\uD83C\uDDF0" // Hong Kong
+            "IDR" -> "\uD83C\uDDEE\uD83C\uDDE9" // Indonesia
+            "ILS" -> "\uD83C\uDDEE\uD83C\uDDF1" // Israel
+            "DKK" -> "\uD83C\uDDE9\uD83C\uDDF0" // Denmark
+            "INR" -> "\uD83C\uDDEE\uD83C\uDDF3" // India
+            "MXN" -> "\uD83C\uDDF2\uD83C\uDDFD" // Mexico
+            "CZK" -> "\uD83C\uDDE8\uD83C\uDDFF" // Czechia
+            "SGD" -> "\uD83C\uDDF8\uD83C\uDDEC" // Singapore
+            "THB" -> "\uD83C\uDDF9\uD83C\uDDED" // Thailand
+            "HRK" -> "\uD83C\uDDED\uD83C\uDDF7" // Croatia
+            "MYR" -> "\uD83C\uDDF2\uD83C\uDDFE" // Malaysia
+            "NOK" -> "\uD83C\uDDF3\uD83C\uDDF4" // Norway
+            "BGN" -> "\uD83C\uDDE7\uD83C\uDDEC" // Bulgaria
+            "PHP" -> "\uD83C\uDDF5\uD83C\uDDED" // Philippines
+            "PLN" -> "\uD83C\uDDF5\uD83C\uDDF1" // Poland
+            "ZAR" -> "\uD83C\uDDFF\uD83C\uDDE6" // South Africa
+            "ISK" -> "\uD83C\uDDEE\uD83C\uDDF8" // Iceland
+            "BRL" -> "\uD83C\uDDE7\uD83C\uDDF7" // Brazil
+            "RON" -> "\uD83C\uDDF7\uD83C\uDDF4" // Romania
+            "TRY" -> "\uD83C\uDDF9\uD83C\uDDF7" // Turkey
+            "RUB" -> "\uD83C\uDDF7\uD83C\uDDFA" // Russia
+            "KRW" -> "\uD83C\uDDF0\uD83C\uDDF7" // South Korea
+            "HUF" -> "\uD83C\uDDED\uD83C\uDDFA" // Hungary
+
+            else -> ""
+        }
+    }
+
+    suspend fun isValidCurrency(symbol: String): Boolean {
+        return withContext(Dispatchers.IO) {
+            AppDatabase.getInstance(context).currencyDao().exists(symbol)
+        }
+    }
+
+    suspend fun getLastUpdate(symbol: String): Long {
+        return withContext(Dispatchers.IO) {
+            AppDatabase.getInstance(context).currencyDao().getLastUpdate(symbol)
+        }
+    }
+
+    companion object {
+        private lateinit var instance: CurrencyRepository
+        fun getInstance(context: Context): CurrencyRepository {
+            if (!::instance.isInitialized) instance = CurrencyRepository(context.applicationContext)
+            return instance
+        }
+    }
+}
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+package de.mm20.launcher2.currencies
+
+import android.content.Context
+import android.util.Log
+import androidx.work.Worker
+import androidx.work.WorkerParameters
+import de.mm20.launcher2.crashreporter.CrashReporter
+import de.mm20.launcher2.database.AppDatabase
+import okhttp3.OkHttpClient
+import okhttp3.Request
+import org.w3c.dom.Element
+import java.text.SimpleDateFormat
+import javax.xml.parsers.DocumentBuilderFactory
+
+class ExchangeRateWorker(val context: Context, params: WorkerParameters) : Worker(context, params) {
+    override fun doWork(): Result {
+        Log.d("MM20", "Updating currency exchange rates")
+        val httpClient = OkHttpClient()
+        val request = Request.Builder()
+                .url("https://www.ecb.europa.eu/stats/eurofxref/eurofxref-daily.xml")
+                .get()
+                .build()
+        try {
+            val response = httpClient.newCall(request).execute()
+            val document = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(response.body?.byteStream()
+                    ?: return Result.retry())
+            val cubes = document.getElementsByTagName("Cube")
+            val values = mutableListOf<Pair<String, Double>>()
+            var timestamp = System.currentTimeMillis()
+            values += "EUR" to 1.0
+            for (i in 0 until cubes.length) {
+                val cube = cubes.item(i) as? Element ?: continue
+                if (cube.hasAttribute("currency")) {
+                    val symbol = cube.getAttribute("currency")
+                    val value = cube.getAttribute("rate").toDoubleOrNull() ?: continue
+                    values += symbol to value
+                } else if (cube.hasAttribute("time")) {
+                    val date = cube.getAttribute("time")
+                    timestamp = SimpleDateFormat("yyyy-MM-dd").parse(date).time
+                }
+            }
+            val currencies = values.map {
+                Currency(
+                        symbol = it.first,
+                        value = it.second,
+                        lastUpdate = timestamp
+                ).toDatabaseEntity()
+            }
+            AppDatabase.getInstance(context).currencyDao().insertAll(currencies)
+            return Result.success()
+        } catch (e: Exception) {
+            CrashReporter.logException(e)
+            return Result.retry()
+        }
+    }
+}