Adding example diary app.

examples/diary.py

@@ -0,0 +1,89 @@
+#!/usr/bin/env python
+
+from collections import OrderedDict
+import datetime
+from getpass import getpass
+import sys
+
+from peewee import *
+from playhouse.sqlcipher_ext import SqlCipherDatabase
+
+# Defer initialization of the database until the script is executed from the
+# command-line.
+db = SqlCipherDatabase(None)
+
+class Entry(Model):
+    content = TextField()
+    timestamp = DateTimeField(default=datetime.datetime.now)
+
+    class Meta:
+        database = db
+
+
+def initialize(passphrase):
+    db.init('diary.db', passphrase=passphrase, kdf_iter=64000)
+    Entry.create_table(True)
+
+def main():
+    while menu_loop():
+        pass
+
+def menu_loop():
+    while True:
+        for key, value in menu.items():
+            print '%s) %s' % (key, value.__doc__)
+        choice = raw_input('Action: ').lower().strip()
+        if choice in menu:
+            menu[choice]()
+
+def add_entry():
+    """Add entry"""
+    print('Enter your entry. Press ctrl+d when finished.')
+    data = sys.stdin.read().strip()
+    if data and raw_input('Save entry? [Yn] ') != 'n':
+        Entry.create(content=data)
+        print('Saved successfully.')
+
+def view_entries(search_query=None):
+    """View previous entries"""
+    query = Entry.select().order_by(Entry.timestamp.desc())
+    if search_query:
+        query = query.where(Entry.content.contains(search_query))
+
+    for entry in query:
+        timestamp = entry.timestamp.strftime('%A %B %d, %Y %I:%M%p')
+        print(timestamp)
+        print('=' * len(timestamp))
+        print(entry.content)
+        print('n) next entry')
+        print('q) return to main menu')
+        if raw_input('Choice? (Nq) ') == 'q':
+            break
+
+def search_entries():
+    """Search entries"""
+    view_entries(raw_input('Search query: '))
+
+def quit():
+    """Quit"""
+    sys.exit(0)
+
+menu = OrderedDict([
+    ('a', add_entry),
+    ('v', view_entries),
+    ('s', search_entries),
+    ('q', quit),
+])
+
+if __name__ == '__main__':
+    # Collect the passphrase using a secure method.
+    passphrase = getpass('Enter password: ')
+
+    if not passphrase:
+        sys.stderr.write('Passphrase required to access diary.\n')
+        sys.stderr.flush()
+        sys.exit(1)
+
+    # Initialize the database.
+    initialize(passphrase)
+    main()