From e7a35d23e50928c14ea0ee4773eb8d3aba1dd407 Mon Sep 17 00:00:00 2001
From: Martin Sekera <sekerama@gmail.com>
Date: Mon, 7 Oct 2019 01:49:59 +0200
Subject: [PATCH] Add .items() to Config

---
 dtk/__init__.py |  1 +
 dtk/argv.py     |  3 ++-
 dtk/aux.py      | 64 +++++++++++++++++++++++++++++++++++++++++++++++++
 dtk/cfg.py      |  3 +++
 dtk/dt.py       | 16 +++++++++++++
 5 files changed, 86 insertions(+), 1 deletion(-)
 create mode 100644 dtk/dt.py

diff --git a/dtk/__init__.py b/dtk/__init__.py
index 78c9094..2df4d07 100644
--- a/dtk/__init__.py
+++ b/dtk/__init__.py
@@ -4,3 +4,4 @@
 from . import argv
 from . import aux
 from . import cfg
+from . import dt
diff --git a/dtk/argv.py b/dtk/argv.py
index 1b9ee5f..6d9a2a1 100644
--- a/dtk/argv.py
+++ b/dtk/argv.py
@@ -131,7 +131,8 @@ class Invocation:
 			else:
 				raise BadKeywordArg(arg)
 	
-	def execute(self):
+	def execute(self, context=None):
+		self.action.context = context
 		self.action(self.cmd, **self.args)
 	
 	def help(self, stream=sys.stdout):
diff --git a/dtk/aux.py b/dtk/aux.py
index 687fc10..39af873 100644
--- a/dtk/aux.py
+++ b/dtk/aux.py
@@ -1,6 +1,8 @@
 #! /usr/bin/env python3
 # encoding: utf-8
 
+# ----------------------------------------------------------------
+
 def flatten_dict(root, glue=" ", prefix=[]):
 	lines = []
 	
@@ -13,3 +15,65 @@ def flatten_dict(root, glue=" ", prefix=[]):
 			lines.append((glue.join(new_prefix), v))
 	
 	return lines
+
+# ----------------------------------------------------------------
+
+import random
+
+PASSPHRASE_VOWELS = "aeiuAEU"
+PASSPHRASE_CONSONANTS = "bcdfghjkmnpqrstvwxyzBCDFGHJKLMNPQRSTVWXYZ23456789"
+
+def random_bytes(length):
+	return open("/dev/urandom", "rb").read(length)
+
+def random_syllable():
+	return random.choice(PASSPHRASE_CONSONANTS) + random.choice(PASSPHRASE_VOWELS) + random.choice(PASSPHRASE_CONSONANTS)
+
+def random_word(syllables=3):
+	parts = []
+	
+	for _ in range(syllables):
+		parts.append(random_syllable())
+	
+	return "".join(parts)
+
+# ----------------------------------------------------------------
+
+import hashlib
+
+def hash_password(p, hexdigest=True):
+	h = hashlib.blake2b()
+	
+	h.update(p.encode("utf-8"))
+	
+	return h.hexdigest() if hexdigest else h.digest()
+
+# ----------------------------------------------------------------
+
+def raw_to_hex(raw, separator=" "):
+	"""
+	Converts a bytearray (or bytes) into its textual hexadecimal representation.
+	"""
+	
+	output = []
+	
+	for o in raw:
+		output.append(hex(o)[2:].zfill(2))
+	
+	return separator.join(output)
+
+def hex_to_raw(text, separator=" "):
+	"""
+	Converts a hexadecimal representation of a byte array into a bytearray.
+	"""
+	
+	output = []
+	
+	text = text.replace(separator, "")
+	
+	for i in range(len(text)//2):
+		output.append(int(text[2*i:2*i+2], 16))
+	
+	return bytearray(output)
+
+# ----------------------------------------------------------------
diff --git a/dtk/cfg.py b/dtk/cfg.py
index 5c94a29..979ca88 100644
--- a/dtk/cfg.py
+++ b/dtk/cfg.py
@@ -30,6 +30,9 @@ class Config:
 	def values(self):
 		return self.raw.values()
 	
+	def items(self):
+		return self.raw.items()
+	
 	def __getitem__(self, name):
 		return self.raw[name]
 	
diff --git a/dtk/dt.py b/dtk/dt.py
new file mode 100644
index 0000000..fcd103b
--- /dev/null
+++ b/dtk/dt.py
@@ -0,0 +1,16 @@
+#! /usr/bin/env python3
+# encoding: utf-8
+
+# ----------------------------------------------------------------
+
+import datetime
+import pytz
+
+def now(tz_name="UTC"):
+	t = datetime.datetime.now()
+	tz = pytz.timezone(tz_name)
+	
+	return tz.localize(t)
+
+# ----------------------------------------------------------------
+