Implement Superchat Calculator

pytchat/processors/superchat/calculator.py

@@ -0,0 +1,73 @@
+import re
+from pytchat.processors.chat_processor import ChatProcessor
+
+superchat_regex = re.compile(r"^(\D*)(\d{1,3}(,\d{3})*(\.\d*)*\b)$")
+
+items_paid = [
+    'addChatItemAction',
+    'item',
+    'liveChatPaidMessageRenderer'
+]
+
+items_sticker = [
+    'addChatItemAction',
+    'item',
+    'liveChatPaidStickerRenderer'
+]
+class Calculator(ChatProcessor):
+    """
+    Calculate the amount of SuperChat by currency.
+    """
+    def __init__(self):
+        self.results = {}
+
+    def process(self, chat_components: list):
+        """
+        Return
+        ------------
+        results : dict :
+            List of amount by currency.
+            key: currency symbol, value: total amount.
+        """
+        if chat_components is None:
+            return self.results
+        for component in chat_components:
+            chatdata = component.get('chatdata')
+            if chatdata is None: continue
+            for action in chatdata:
+                renderer = self._get_item(action, items_paid) or \
+                           self._get_item(action, items_sticker)
+                if renderer is None: continue
+                symbol, amount = self._parse(renderer)
+                self.results.setdefault(symbol,0)
+                self.results[symbol]+=amount
+        return self.results
+    
+    def _parse(self, renderer):
+        purchase_amount_text = renderer["purchaseAmountText"]["simpleText"]
+        m = superchat_regex.search(purchase_amount_text)
+        if m:
+            symbol = m.group(1)
+            amount = float(m.group(2).replace(',',''))
+        else:
+            symbol = ""
+            amount = 0.0
+        return symbol, amount
+
+    def _get_item(self, dict_body, items: list):
+        for item in items:
+            if dict_body is None:
+                break
+            if isinstance(dict_body, dict):
+                dict_body = dict_body.get(item)
+                continue
+            if isinstance(item, int) and \
+               isinstance(dict_body, list) and \
+               len(dict_body) > item:
+                dict_body = dict_body[item]
+                continue
+            return None
+        return dict_body
+
+
+