From a42b910de4e4a6d02d943accf7d5350f3b2af25e Mon Sep 17 00:00:00 2001
From: Niklas Meinzer <dev@niklas-meinzer.de>
Date: Mon, 3 Jun 2024 20:45:11 +0200
Subject: [PATCH] Add common area share into calculation

---
 public/index.html |  2 +-
 src/Data.js       | 87 +++++++++++++++++++++++++++++++++++++++++++----
 src/Solimieten.js | 31 +++++++++++------
 3 files changed, 103 insertions(+), 17 deletions(-)

diff --git a/public/index.html b/public/index.html
index 96b9a3a..5475ab3 100644
--- a/public/index.html
+++ b/public/index.html
@@ -7,7 +7,7 @@
     <meta name="theme-color" content="#000000" />
     <meta
       name="description"
-      content="Web site created using create-react-app"
+      content="Solimieten-Tool der Allmende Gundelfingen"
     />
     <link rel="apple-touch-icon" href="%PUBLIC_URL%/logo192.png" />
     <!--
diff --git a/src/Data.js b/src/Data.js
index 369b835..6775e7f 100644
--- a/src/Data.js
+++ b/src/Data.js
@@ -5,44 +5,102 @@ class Flat {
         this.sizePrivate = sizePrivate;
         this.isWbs = isWbs;
         this.sizeShared = 0;
+        // Normal flats have as many people as rooms
+        // WGs and cluster flats have one more room
         if (!wgRoomList) {
             this.wgRoomList = [];
+            this.numPeople = numRooms;
         } else {
             this.wgRoomList = wgRoomList;
             this.sizeShared = this.sizePrivate;
             for (var i = 0; i < this.wgRoomList.length; i++) {
                 this.sizeShared -= this.wgRoomList[i].size;
             }
+            this.numPeople = numRooms - 1;
         }
 
     }
 
+    // Returns a string representation of the flat
     print() {
         return this.name + " (" + this.numRooms + " Zimmer)";
     }
+
+    // Calculates the share of the internal shared area the party has to pay for
+    // This is only applicable for WGs and clusters, i.e. when a room is selected.
+    calcInternalAreaShare(room = null) {
+        return room ? this.sizeShared / this.numPeople * room.numPeople : 0;
+    }
+
+    // Calculates the share of the project wide common area
+    // the party has to pay for.
+    // Currently done by number of people in the party.
+    calcCommonAreaShare(room = null) {
+        var numPeople;
+        if (room) {
+            numPeople = room.numPeople;
+        } else {
+            numPeople = this.numRooms;
+        }
+
+        return commonArea / numPeopleTotal * numPeople;
+    }
+
+    // Calculates the total area the party has to pay for
+    // Includes the private area, share of the common area and for
+    // WGs and clusters the share of the internal shared area
+    calcTotalPayedArea(room = null) {
+        var commonAreaShare = this.calcCommonAreaShare(room);
+
+        if (!room) {
+            return this.sizePrivate + commonAreaShare;
+        } else {
+            return room.size + commonAreaShare + this.calcInternalAreaShare(room);
+        }
+    }
+}
+
+class Room {
+    constructor(name, size, numPeople = 1) {
+        this.name = name;
+        this.size = size;
+        this.numPeople = numPeople;
+    }
+
+    print() {
+        return this.name;
+    }
 }
 
 export const flatData = {
     "north": {
         0: [
-            new Flat("W 0.1", 4, 82.7, false, false, [{ label: "0.1 02", size: 12.8 }, { label: "0.1 03", size: 12.8 }, { label: "0.1 04", size: 14.6 }]), // Todo: make WG
+            new Flat("W 0.1", 4, 82.7, false, false, [
+                new Room("0.1 02", 12.8), new Room("0.1 03", 12.8), new Room("0.1 04", 14.6)
+            ]),
             new Flat("W 0.2", 2, 53.1, true),
             new Flat("W 0.3", 3, 62, true)
         ],
         1: [
             new Flat("W 1.1", 4, 82.5, true),
             new Flat("W 1.2", 1, 35.4, true),
-            new Flat("W 1.3", 4, 61, true, false, [{ label: "1.3 02", size: 11.88 }, { label: "1.3 03", size: 11.41 }, { label: "1.3 04", size: 11.89 }])
+            new Flat("W 1.3", 4, 61, true, false, [
+                new Room("1.3 02", 11.88), new Room("1.3 03", 11.41), new Room("1.3 04", 11.89)
+            ])
         ],
         2: [
             new Flat("W 2.1", 4, 82.6, true),
             new Flat("W 2.2", 2, 45.3, true),
-            new Flat("W 2.3", 5, 148.77, true, true, [{ label: "1 Person", size: 25.32 }, { label: "2 Personen", size: 44.52 }, { label: "1 Person (rollstuhlgerecht)", size: 39.8 }]),
+            new Flat("W 2.3", 5, 148.77, true, true, [
+                new Room("1 Person", 25.32), new Room("2 Personen", 44.52, 2), new Room("1 Person (rollstuhlgerecht)", 39.8)
+            ]),
             new Flat("W 2.4", 2, 62.5, true, true)
         ],
         3: [
             new Flat("W 3.1", 4, 82.6),
-            new Flat("W 3.2", 5, 148.77, true, true, [{ label: "1 Person", size: 25.32 }, { label: "2 Personen", size: 44.52 }, { label: "1 Person (rollstuhlgerecht)", size: 39.8 }]),
+            new Flat("W 3.2", 5, 148.77, true, true, [
+                new Room("1 Person", 25.32), new Room("2 Personen", 44.52, 2), new Room("1 Person (rollstuhlgerecht)", 39.8)
+            ]),
             new Flat("W 3.3", 3, 61.8, true)
         ]
     },
@@ -54,7 +112,9 @@ export const flatData = {
         ],
         1: [
             new Flat("W 1.4", 2, 55.7),
-            new Flat("W 1.5 (WG)", 5, 83.86, true, false, [{ label: "1.5 02", size: 15.72 }, { label: "1.5 03", size: 9.81 }, { label: "1.5 05", size: 11.48 }, { label: "1.5 06", size: 13.45 }]),
+            new Flat("W 1.5 (WG)", 5, 83.86, true, false,
+                [new Room("1.5 02", 15.72), new Room("1.5 03", 9.81), new Room("1.5 05", 11.48), new Room("1.5 06", 13.45)]
+            ),
             new Flat("W 1.6.0", 1, 25.6),
             new Flat("W 1.6", 5, 95.7),
         ],
@@ -67,4 +127,19 @@ export const flatData = {
 }
 
 export const minRent = 9.50;
-export const maxRent = 15.60;
\ No newline at end of file
+export const maxRent = 15.60;
+
+const commonArea = 388.80;
+
+// Calculate total number of people
+var _numPeople = 0;
+
+for (const building of Object.keys(flatData)) {
+    for (const floor of Object.keys(flatData[building])) {
+        for (const flat of flatData[building][floor]) {
+            _numPeople += flat.numPeople;
+        }
+    }
+}
+
+const numPeopleTotal = _numPeople;
\ No newline at end of file
diff --git a/src/Solimieten.js b/src/Solimieten.js
index 2eae1a8..1dc5f58 100644
--- a/src/Solimieten.js
+++ b/src/Solimieten.js
@@ -58,6 +58,7 @@ export function FlatSelectionCard({ setSelectedFlat, onRoomSelected }) {
             setRoomOptions(flat.wgRoomList);
         }
         setSelectedFlat(flatOptions[index]);
+        onRoomSelected(null);
     }
     function roomSelected(e) {
         onRoomSelected(roomOptions[e.target.value]);
@@ -80,7 +81,7 @@ export function FlatSelectionCard({ setSelectedFlat, onRoomSelected }) {
                     {flatOptions.map((flat, index) => <option value={index} >{flat.print()}</option>)}
                 </Select>
                 {roomOptions.length > 0 ? (<Select placeholder='Zimmer auswählen' onChange={roomSelected}>
-                    {roomOptions.map((room, index) => <option value={index} >{room.label} ({room.size} m²)</option>)}
+                    {roomOptions.map((room, index) => <option value={index} >{room.print()} ({room.size} m²)</option>)}
                 </Select>) : null}
             </Stack>
         </CardBody>
@@ -101,10 +102,12 @@ export function FlatDetailsCard({ flat, room }) {
         }
 
         var sizeSharedBox = null;
-        var sizeSharedShare = 0;
+
+        var commonAreaShare = flat.calcCommonAreaShare(room);
+        var internalAreaShare = flat.calcInternalAreaShare(room);
 
         if (flat.wgRoomList.length > 0) {
-            sizeSharedShare = flat.sizeShared / flat.wgRoomList.length;
+
             sizeSharedBox = <Box>
                 <Heading size='xs' textTransform='uppercase'>
                     Interne Gemeinschaftsfläche
@@ -116,6 +119,8 @@ export function FlatDetailsCard({ flat, room }) {
 
         }
 
+        var totalSizeToPay = flat.calcTotalPayedArea(room);
+
         body = <CardBody>
 
             <Stack divider={<StackDivider />} spacing='4'>
@@ -125,7 +130,7 @@ export function FlatDetailsCard({ flat, room }) {
                         Bezeichnung
                     </Heading>
                     <Text pt='2' fontSize='sm'>
-                        {flat.name} {room ? "Zimmer: " + room.label : null}
+                        {flat.name} {room ? "Zimmer: " + room.print() : null}
                     </Text>
                 </Box>
                 <Box>
@@ -139,12 +144,21 @@ export function FlatDetailsCard({ flat, room }) {
                 {sizeSharedBox}
                 <Box>
                     <Heading size='xs' textTransform='uppercase'>
-                        Fläche
+                        Anteil Gemeinschaftsfläche
                     </Heading>
                     <Text pt='2' fontSize='sm'>
-                        {(sizePrivate + sizeSharedShare).toFixed(2)} m² {sizeSharedShare ? ("(" + sizePrivate + " m² Zimmer + " + sizeSharedShare.toFixed(2) + " m² Anteil interne Gemeinschaftsfläche)") : null}
+                        {commonAreaShare.toFixed(2)} m² {internalAreaShare ? ("(Allmendefläche) + " + internalAreaShare.toFixed(2) + " m² (WG/Cluster-Fläche)") : ""}
                     </Text>
                 </Box>
+                <Box>
+                    <Heading size='xs' textTransform='uppercase'>
+                        Zahlfläche
+                    </Heading>
+                    <Text pt='2' fontSize='sm'>
+                        {sizePrivate.toFixed(2)} m² + {commonAreaShare.toFixed(2)} m² (Allmendefläche) {internalAreaShare ? " + " + (internalAreaShare.toFixed(2) + " m² (WG/Cluster-Fläche)") : null}
+                    </Text>
+                    <Text pt={3} size='s' fontWeight='bold'>Gesamt: {totalSizeToPay.toFixed(2)} m² </Text>
+                </Box>
             </Stack>
         </CardBody>;
 
@@ -254,10 +268,7 @@ export function SelfEvaluationCard({ rent, setRent }) {
 export function ResultsCard({ rent, flat, room }) {
     var body = <CardBody></CardBody>
     if (flat && (room || flat.wgRoomList.length === 0)) {
-        var totalSize = flat.sizePrivate;
-        if (room) {
-            totalSize = room.size + flat.sizeShared / flat.wgRoomList.length;
-        }
+        var totalSize = flat.calcTotalPayedArea(room)
 
         var relativeRent = rent / totalSize;
         var rangePosition = ((relativeRent - minRent) / (maxRent - minRent)) * 100;