(WIP) implementing CBD language... Meta-meta-model: Association inherits from Class. Matcher accepts pivot. Add generic graphviz renderer.

concrete_syntax/plantuml/make_url.py

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+from zlib import compress
+import base64
+import string
+
+maketrans = bytes.maketrans
+
+# Includes code fragments from: https://github.com/dougn/python-plantuml/blob/bb5407e87aabbac9e8baef5a6726b03f72afca16/plantuml.py
+# Copyright (c) 2013, Doug Napoleone and then Copyright (c) 2015, Samuel Marks
+
+plantuml_alphabet = string.digits + string.ascii_uppercase + string.ascii_lowercase + '-_'
+base64_alphabet   = string.ascii_uppercase + string.ascii_lowercase + string.digits + '+/'
+b64_to_plantuml = maketrans(base64_alphabet.encode('utf-8'), plantuml_alphabet.encode('utf-8'))
+
+def encode(plantuml_text: str) -> str:
+    zlibbed_str = compress(plantuml_text.encode('utf-8'))
+    compressed_string = zlibbed_str[2:-4]
+    return base64.b64encode(compressed_string).translate(b64_to_plantuml).decode('utf-8')
+
+def make_url(plantuml_text: str) -> str:
+    encoded = encode(plantuml_text)
+    return f"https://deemz.org/plantuml/pdf/{encoded}"