30d change display option (#58)

* display option: change30d

README.md

@@ -77,6 +77,7 @@ volume_precision = 2
   - **change1h:** Displays the price change over the past hour.
   - **change24h:** Displays the price change over the past 24 hours.
   - **change7d:** Displays the price change over the past week.
+  - **change30d:** Displays the price change over the past month.
   - **volume24h:** Displays the volume in your chosen currency, over the past 24 hours.
 - **api_key:** CoinmarketCap API key obtained from their [new api](https://coinmarketcap.com/api/) (The public API is discontinuing :'()
 

config.ini.example

@@ -1,7 +1,7 @@
 [general]
 currency = eur
 currency_symbol = €
-# options are {price,change1h,change24h,change7d,volume24h}
+# options are {price,change1h,change24h,change7d,change30d,volume24h}
 display = price,change24h
 api_key = some_coinmarketcap_key
 
@@ -15,4 +15,4 @@ volume_precision = 2
 icon = 
 price_precision = 2
 change_precision = 2
-volume_precision = 2
+volume_precision = 2

waybar_crypto.py

@@ -29,7 +29,7 @@ class WaybarCrypto(object):
 
     def __init__(self, config_path: str):
         """
-        Take config_path pointting to crypto.ini.
+        Take config_path pointing to crypto.ini.
 
         Parses crypto.ini to self.config
         """
@@ -270,6 +270,12 @@ def get_json(self) -> str:
                 )
                 output += f"7d:{percentage_change:+}% "
 
+            if "change30d" in display_options:
+                percentage_change = round(
+                    Decimal(pair_info["percent_change_30d"]), change_precision
+                )
+                output += f"30d:{percentage_change:+}% "
+
             output_obj["text"] += output
             output_obj["tooltip"] += output