Now the coffeebrewingeventrepository can return the top brewers, sorted.

CodemateLtd · Feb 13, 2017 · 00b50b9 · 00b50b9
1 parent fe8343c
commit 00b50b9
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diff --git a/app/src/androidTest/java/com/codemate/koffeemate/data/local/CoffeeEventRepositoryTest.kt b/app/src/androidTest/java/com/codemate/koffeemate/data/local/CoffeeEventRepositoryTest.kt
@@ -96,6 +96,30 @@ class CoffeeEventRepositoryTest {
         assertThat(coffeeEventRepository.getAccidentCountForUser(user), equalTo(3L))
     }
 
+    @Test
+    fun getTopBrewers_ReturnsTopBrewersSorted() {
+        coffeeEventRepository.recordBrewingEvent()
+        coffeeEventRepository.recordBrewingEvent()
+
+        val brewingMaster = User(id = "abc123")
+        coffeeEventRepository.recordBrewingEvent(brewingMaster)
+        coffeeEventRepository.recordBrewingEvent(brewingMaster)
+        coffeeEventRepository.recordBrewingEvent(brewingMaster)
+
+        val brewingApprentice = User(id = "a1b2c3")
+        coffeeEventRepository.recordBrewingEvent(brewingApprentice)
+        coffeeEventRepository.recordBrewingEvent(brewingApprentice)
+
+        val brewingNoob = User(id = "cba321")
+        coffeeEventRepository.recordBrewingEvent(brewingNoob)
+
+        val sortedBrewers = coffeeEventRepository.getTopBrewers()
+        assertThat(sortedBrewers.size, equalTo(3))
+        assertThat(sortedBrewers[0].id, equalTo(brewingMaster.id))
+        assertThat(sortedBrewers[1].id, equalTo(brewingApprentice.id))
+        assertThat(sortedBrewers[2].id, equalTo(brewingNoob.id))
+    }
+
     private fun coffeeEventCount() = with(Realm.getDefaultInstance()) {
         val count = where(CoffeeBrewingEvent::class.java)
                 .equalTo("isSuccessful", true)

diff --git a/app/src/main/java/com/codemate/koffeemate/data/local/CoffeeEventRepository.kt b/app/src/main/java/com/codemate/koffeemate/data/local/CoffeeEventRepository.kt
@@ -13,9 +13,26 @@ interface CoffeeEventRepository {
 
     fun getLastBrewingEvent(): CoffeeBrewingEvent?
     fun getLastBrewingAccident(): CoffeeBrewingEvent?
+    fun getTopBrewers(): List<User>
 }
 
 class RealmCoffeeEventRepository : CoffeeEventRepository {
+    override fun getTopBrewers() = with(Realm.getDefaultInstance()) {
+        val users = where(CoffeeBrewingEvent::class.java)
+                .isNotNull("user")
+                .findAll()
+
+        val copy = copyFromRealm(users)
+                .groupBy(CoffeeBrewingEvent::user)
+                .entries
+                .sortedByDescending { it.value.size }
+                .map { it.key }
+                .filterNotNull()
+
+        close()
+        return@with copy
+    }
+
     override fun recordBrewingEvent(user: User?) = with(Realm.getDefaultInstance()) {
         var event: CoffeeBrewingEvent? = null
         executeTransaction {