New API functions: date and time (breaks backward compatibility)

Datetime frontmatter fields are automatically detected

_src/apis.py

@@ -1,5 +1,6 @@
 import os
 from item import Item # from itself
+import datetime
 
 class Content:
     """This class contains some functions useful for evaluation of Python code in content files"""
@@ -39,3 +40,17 @@ class Content:
         for entry in os.scandir('content/'+dir):
             item = Item(os.path.relpath(entry.path, start='content'))
             if item.title: yield item
+    
+    def date(src) -> str:
+        """Returns date string from datetime or date object"""
+        
+        if type(src) != datetime.time:
+            return src.strftime('%Y-%m-%d')
+        return ''
+    
+    def time(src) -> str:
+        """Returns time string from datetime or time object"""
+        
+        if type(src) != datetime.date:
+            return src.strftime('%H:%M')
+        return ''

_src/item.py

@@ -1,7 +1,7 @@
 import frontmatter # from package python-frontmatter
 import datetime
 from files import read_this # from itself
-from config import config
+from config import config # from itself
 from attrdict import AttrDict # from itself
 
 class Item(AttrDict):
@@ -12,11 +12,9 @@ class Item(AttrDict):
     tags = []
     description = None
     source = None
-    date = None
-    time = None
     author = None
     
-    def __init__(self, path):
+    def __init__(self, path: str):
         # initialize parent
         super().__init__()
         
@@ -31,17 +29,13 @@ class Item(AttrDict):
             if field not in frontmatter_data:
                 frontmatter_data[field] = config['defaults'][field]
         
+        # share frontmatter fields
         for field in frontmatter_data:
-            if field == 'created':
-                # frontmatter produces date objects if created field is in format yyyy-mm-dd
-                # if it contains time as in ISO 8601, we want to convert it to datetime
-                # https://en.wikipedia.org/wiki/ISO_8601
-                if type(frontmatter_data['created']) == str:
-                    frontmatter_data['created'] = datetime.datetime.fromisoformat(
-                        frontmatter_data['created'])
-                    self.date = str(frontmatter_data['created'].date())
-                    self.time = str(frontmatter_data['created'].time())
-                else:
-                    self.date = str(frontmatter_data['created'])
-            else:
-                self[field] = frontmatter_data[field]
+            self[field] = frontmatter_data[field]
+            
+            # convert ISO datetime strings into datetime objects
+            if type(self[field]) == str:
+                try: self[field] = datetime.date.fromisoformat(self[field])
+                except ValueError:
+                    try: self[field] = datetime.datetime.fromisoformat(self[field])
+                    except ValueError: pass