Add a new statistics item that show how much money you would have spent at a cafe

src/app/settings/settings.page.html

@@ -265,6 +265,13 @@ <h2>{{"PAGE_SETTINGS_USE_NUERMIC_KEYBOARD_FOR_GRIND_SIZE" | translate}}</h2>
               </div>
             </ion-checkbox>
           </ion-item>
+          <ion-item>
+            <ion-item>
+              <ion-label position="stacked">{{"PAGE_SETTINGS_AVG_COST_PER_COFFEE_AT_CAFE" | translate}}</ion-label>
+              <ion-input type="number" (ngModelChange)="saveSettings();" [(ngModel)]="settings.avg_cost_per_coffee_at_cafe"></ion-input>
+              <ion-note>{{"PAGE_SETTINGS_AVG_COST_PER_COFFEE_AT_CAFE_DESCRIPTION" | translate}}</ion-note>
+            </ion-item>
+          </ion-item>
           <ion-item>
             <ion-select (ngModelChange)="saveSettings()" [(ngModel)]="settings.currency"
               cancelText="{{'CANCEL'| translate }}" okText="{{'CHOOSE'| translate }}">

src/app/statistic/statistic.page.html

@@ -73,6 +73,17 @@
             </ion-card-content>
           </ion-card>
         </ion-col>
+        <ion-col class="ion-text-center" size="6">
+          <ion-card class="small-card" style="height: 100%;">
+            <ion-card-header class="card-background"
+              style="font-size: 1.2em;">{{uiStatistic.getMoneySavedOnCoffee() | number : '.0-2'}}&nbsp;
+              {{getCurrencySymbol()}}
+            </ion-card-header>
+            <ion-card-content>
+              {{"PAGE_STATISTICS_MONEY_SAVED_ON_COFFEE" | translate}}
+            </ion-card-content>
+          </ion-card>
+        </ion-col>
         <ion-col class="ion-text-center" size="6">
           <ion-card class="small-card" style="height: 100%;">
             <ion-card-header class="card-background" style="font-size: 1.2em;">{{uiStatistic.getBrewsDrunk() | number : '.0'}}

src/assets/i18n/en.json

@@ -74,6 +74,7 @@
     "PAGE_SETTINGS_CURRENCY": "Currency",
     "PAGE_STATISTICS_DIFFERENT_PREPARATION_METHOD": "Preparation Methods",
     "PAGE_STATISTICS_TOTAL_GROUND_BEANS": "Total beans ground",
+    "PAGE_STATISTICS_MONEY_SAVED_ON_COFFEE": "Money saved on coffee",
     "PAGE_STATISTICS_MONEY_SPENT_FOR_COFFEE": "Money spent on beans",
     "PAGE_STATISTICS_DRUNKEN_BREWS": "Total number of brews",
     "PAGE_STATISTICS_BREW_PROCESSES": "Total brews",
@@ -1632,6 +1633,8 @@
     "CUSTOM_REPEAT_PARAMETERS_DESCRIPTION": "Activate customized repeat?",
     "PAGE_SETTINGS_USE_NUERMIC_KEYBOARD_FOR_GRIND_SIZE": "Numeric keyboard for grind setting?",
     "PAGE_SETTINGS_USE_NUERMIC_KEYBOARD_FOR_GRIND_SIZE_DESCRIPTION": "Do you want use a numeric keyboard for the grind setting, instead of the using of the whole keyboard?",
+    "PAGE_SETTINGS_AVG_COST_PER_COFFEE_AT_CAFE": "Average cost per coffee at cafe",
+    "PAGE_SETTINGS_AVG_COST_PER_COFFEE_AT_CAFE_DESCRIPTION": "The average cost per coffee at a cafe",
     "PREPARATION_DEVICE": {
         "TYPE": {
             "NONE": "None",

src/classes/settings/settings.ts

@@ -176,6 +176,8 @@ export class Settings implements ISettings {
   public refractometer_stay_connected: boolean;
   public refractometer_log: boolean;
 
+  public avg_cost_per_coffee_at_cafe: number;
+
   public currency: string;
   public brew_display_bean_image: boolean;
   public best_brew: boolean;
@@ -415,6 +417,8 @@ export class Settings implements ISettings {
     this.refractometer_stay_connected = false;
     this.refractometer_log = false;
 
+    this.avg_cost_per_coffee_at_cafe = 0;
+
     this.currency = 'EUR';
     this.brew_milliseconds_leading_digits = 3;
     this.brew_display_bean_image = false;

src/interfaces/settings/iSettings.ts

@@ -169,6 +169,8 @@ export interface ISettings {
   refractometer_stay_connected: boolean;
   refractometer_log: boolean;
 
+  avg_cost_per_coffee_at_cafe: number;
+
   currency: string;
   brew_display_bean_image: boolean;
   best_brew: boolean;

src/services/uiStatistic.ts

@@ -52,6 +52,13 @@ export class UIStatistic {
     return this.uiBrewStorage.getAllEntries().length;
   }
 
+  public getMoneySavedOnCoffee(): number {
+    const avg_cost_per_coffee_at_cafe = this.uiSettings.getSettings().avg_cost_per_coffee_at_cafe;
+    const numberOfCoffees = this.getBrewsDrunk();
+
+    return numberOfCoffees * avg_cost_per_coffee_at_cafe;
+  }
+
   public getBeansCount(): number {
     return this.uiBeanStorage.getAllEntries().length;
   }