Add winning pct to league results view (#25)

* add ability to open data from file and save to file
add ability to open data from url

Signed-off-by: John Burns <wakingrufus@gmail.com>

* fix #14 Show win percentage in league results view

add new calculator for most improved over a period of time

Signed-off-by: John Burns <wakingrufus@gmail.com>

src/main/kotlin/com/github/wakingrufus/eloleague/results/MostImprovedView.kt

@@ -0,0 +1,57 @@
+package com.github.wakingrufus.eloleague.results
+
+import com.github.wakingrufus.eloleague.player.PlayerItem
+import javafx.beans.property.SimpleObjectProperty
+import javafx.beans.property.SimpleStringProperty
+import tornadofx.*
+import java.time.LocalDate
+import java.time.ZoneOffset
+import java.time.ZonedDateTime
+
+class MostImprovedView : Fragment() {
+    val leagueResultItem: LeagueResultItem by param()
+    var startDate = SimpleObjectProperty<LocalDate>(LocalDate.now())
+    var endDate = SimpleObjectProperty<LocalDate>(LocalDate.now())
+    var winner = SimpleStringProperty()
+    override val root = borderpane {
+        center {
+            form {
+                fieldset {
+                    field {
+                        label("Start Date")
+                        datepicker {
+                            bind(startDate)
+                        }
+                    }
+                    field {
+                        label("End Date")
+                        datepicker {
+                            bind(endDate)
+                        }
+                    }
+                }
+                textfield {
+                    isEditable = false
+                    bind(winner)
+                }
+            }
+
+        }
+        bottom {
+            buttonbar {
+                button("Calculate") {
+                    action {
+                        winner.value = leagueResultItem.games.asSequence()
+                                .filter { ZonedDateTime.parse(it.entryDate).isAfter(startDate.value.atStartOfDay().atOffset(ZoneOffset.UTC).toZonedDateTime()) }
+                                .filter { ZonedDateTime.parse(it.entryDate).isBefore(endDate.value.plusDays(1).atStartOfDay().atOffset(ZoneOffset.UTC).toZonedDateTime()) }
+                                .fold(mapOf<PlayerItem, Int>()) { map, game ->
+                                    map + (game.player to (map[game.player] ?: 0) + game.ratingAdjustment)
+                                }.maxBy { it.value }?.let {
+                                    "${it.key.name} (${it.value})"
+                                }
+                    }
+                }
+            }
+        }
+    }
+}

src/main/kotlin/com/github/wakingrufus/eloleague/results/ResultsView.kt

@@ -1,11 +1,14 @@
 package com.github.wakingrufus.eloleague.results
 
 import javafx.beans.binding.Bindings
+import javafx.beans.property.ReadOnlyStringWrapper
 import javafx.collections.FXCollections
 import javafx.collections.ObservableList
 import javafx.stage.StageStyle
 import mu.KLogging
 import tornadofx.*
+import java.math.BigDecimal
+import java.math.MathContext
 
 class ResultsView : Fragment() {
     companion object : KLogging()
@@ -26,6 +29,17 @@ class ResultsView : Fragment() {
                 id = "results-tableview"
                 column("Name", PlayerResultItem::nameProperty)
                 column("Rating", PlayerResultItem::currentRatingProperty)
+                column<PlayerResultItem, String>("Win %") {
+                    if (it.value.gamesPlayedProperty.value > 0) {
+                        ReadOnlyStringWrapper((BigDecimal(it.value.winsProperty.value)
+                                .divide(BigDecimal(it.value.gamesPlayedProperty.value), MathContext.DECIMAL32))
+                                .movePointRight(2)
+                                .toString())
+                    } else {
+                        ReadOnlyStringWrapper("N/A")
+                    }
+
+                }
                 column("Games", PlayerResultItem::gamesPlayedProperty)
                 column("Wins", PlayerResultItem::winsProperty)
                 column("Losses", PlayerResultItem::lossesProperty)
@@ -66,6 +80,16 @@ class ResultsView : Fragment() {
                         playerList.predicate = { it.gamesPlayedProperty >= trialPeriod }
                     }
                 }
+                button("Most Improved") {
+                    action {
+                        find<MostImprovedView>(mapOf("leagueResultItem" to leagueResultItem)).apply {
+                            openModal(
+                                    stageStyle = StageStyle.UTILITY,
+                                    block = true
+                            )
+                        }
+                    }
+                }
             }
         }
     }