backend and BookPage.js use currencies.json

api/currencies.json

@@ -0,0 +1,6 @@
+{
+	"1":"USD",
+	"2":"EUR",
+	"3":"ETH",
+	"4":"ABC"
+}

api/models.py

@@ -7,6 +7,7 @@ from django.dispatch import receiver
 from django.utils.html import mark_safe
 
 from pathlib import Path
+import json
 
 #############################
 # TODO
@@ -65,11 +66,6 @@ class Order(models.Model):
         BUY  = 0, 'BUY'
         SELL = 1, 'SELL'
 
-    class Currencies(models.IntegerChoices):
-        USD = 1, 'USD'
-        EUR = 2, 'EUR'
-        ETH = 3, 'ETH'
-
     class Status(models.IntegerChoices):
         WFB = 0, 'Waiting for bond'
         PUB = 1, 'Published in order book'
@@ -92,6 +88,9 @@ class Order(models.Model):
         TLD = 18, 'Taker lost dispute'
         EXP = 19, 'Expired'
 
+    currency_dict = json.load(open('./api/currencies.json'))
+    currency_choices = [(int(val), label) for val, label in list(currency_dict.items())]
+    print(currency_choices)
     # order info
     status = models.PositiveSmallIntegerField(choices=Status.choices, null=False, default=Status.WFB)
     created_at = models.DateTimeField(auto_now_add=True)
@@ -99,7 +98,7 @@ class Order(models.Model):
 
     # order details
     type = models.PositiveSmallIntegerField(choices=Types.choices, null=False)
-    currency = models.PositiveSmallIntegerField(choices=Currencies.choices, null=False)
+    currency = models.PositiveSmallIntegerField(choices=currency_choices, null=False)
     amount = models.DecimalField(max_digits=9, decimal_places=4, validators=[MinValueValidator(0.00001)])
     payment_method = models.CharField(max_length=30, null=False, default="not specified", blank=True)
 

api/urls.py

@@ -1,9 +1,10 @@
 from django.urls import path
-from .views import OrderMakerView, OrderView, UserView, BookView
+from .views import OrderMakerView, OrderView, UserView, BookView, get_currencies_json
 
 urlpatterns = [
     path('make/', OrderMakerView.as_view()),
     path('order/', OrderView.as_view({'get':'get','post':'take_or_update'})),
     path('usergen/', UserView.as_view()),
     path('book/', BookView.as_view()),
+    path('currencies/', get_currencies_json),
     ]

api/views.py

@@ -21,6 +21,9 @@ from pathlib import Path
 from datetime import timedelta
 from django.utils import timezone
 
+import json
+from django.http import HttpResponse
+
 # .env
 expiration_time = 8
 
@@ -263,6 +266,7 @@ class BookView(ListAPIView):
 
     def get(self,request, format=None):
         currency = request.GET.get('currency')
+        print("currency:", currency)
         type = request.GET.get('type') 
         queryset = Order.objects.filter(currency=currency, type=type, status=int(Order.Status.PUB)) 
         if len(queryset)== 0:
@@ -282,6 +286,9 @@ class BookView(ListAPIView):
         
         return Response(book_data, status=status.HTTP_200_OK)
 
+def get_currencies_json(request):
+    currency_dict = json.load(open('./api/currencies.json'))
+    return HttpResponse(json.dumps(currency_dict),content_type="application/json")
 
         
 

frontend/src/components/BookPage.js

@@ -8,8 +8,10 @@ export default class BookPage extends Component {
       orders: new Array(),
       currency: 1,
       type: 1,
+      currencies_dict: {"1":"USD"}
     };
     this.getOrderDetails()
+    this.getCurrencyDict()
     this.state.currencyCode = this.getCurrencyCode(this.state.currency)
   }
 
@@ -24,6 +26,15 @@ export default class BookPage extends Component {
         not_found: data.not_found,
       }));
   }
+  getCurrencyDict() {
+    fetch('/api/currencies')
+      .then((response) => response.json())
+      .then((data) => 
+      this.setState({
+        currencies_dict: data
+      }));
+
+  }
 
   handleCardClick=(e)=>{
     console.log(e)
@@ -48,7 +59,7 @@ export default class BookPage extends Component {
   // Gets currency code (3 letters) from numeric (e.g., 1 -> USD)
   // Improve this function so currencies are read from json
   getCurrencyCode(val){
-    return (val == 1 ) ? "USD": ((val == 2 ) ? "EUR":"ETH")
+    return this.state.currencies_dict[val.toString()]
   }
 
   // pretty numbers
@@ -156,9 +167,10 @@ export default class BookPage extends Component {
                   }}
                   onChange={this.handleCurrencyChange}
               >
-                  <MenuItem value={1}>USD</MenuItem>
+                    {
-                  <MenuItem value={2}>EUR</MenuItem>
+                      Object.entries(this.state.currencies_dict)
-                  <MenuItem value={3}>ETH</MenuItem>
+                      .map( ([key, value]) => <MenuItem value={parseInt(key)}>{value}</MenuItem> )
+                    }
               </Select>
             </FormControl>
           </Grid>

frontend/urls.py

@@ -9,4 +9,5 @@ urlpatterns = [
     path('book/', index),
     path('order/<int:orderId>', index),
     path('wait/', index),
+    path('currencies/',index)    
 ]