Info Select & Rendering responses JSON

awsshell/interaction.py

@@ -77,19 +77,32 @@ def __init__(self, model, prompt_msg, prompter=select_prompt):
         super(SimpleSelect, self).__init__(model, prompt_msg)
         self._prompter = prompter
 
-    def execute(self, data):
+    def execute(self, data, show_meta=False):
         if not isinstance(data, list) or len(data) < 1:
             raise InteractionException('SimpleSelect expects a non-empty list')
         if self._model.get('Path') is not None:
             display_data = jmespath.search(self._model['Path'], data)
-            result = self._prompter('%s ' % self.prompt, display_data)
+            options_meta = data if show_meta else None
+            result = self._prompter('%s ' % self.prompt, display_data,
+                                    options_meta=options_meta)
             (selected, index) = result
             return data[index]
         else:
             (selected, index) = self._prompter('%s ' % self.prompt, data)
             return selected
 
 
+class InfoSelect(SimpleSelect):
+    """Display a list of options with meta information.
+
+    Small extension of :class:`SimpleSelect` that turns the show_meta flag on
+    to display what the complete object looks like rendered as json in a pane
+    below the prompt.
+    """
+    def execute(self, data):
+        return super(InfoSelect, self).execute(data, show_meta=True)
+
+
 class SimplePrompt(Interaction):
     """Prompt the user to type in responses for each field.
 
@@ -174,6 +187,7 @@ class InteractionLoader(object):
     Interaction objects can be instantiated from their corresponding str.
     """
     _INTERACTIONS = {
+        'InfoSelect': InfoSelect,
         'FuzzySelect': FuzzySelect,
         'SimpleSelect': SimpleSelect,
         'SimplePrompt': SimplePrompt,

awsshell/selectmenu.py

@@ -1,4 +1,3 @@
-import json
 from pygments.lexers import find_lexer_class
 from prompt_toolkit.keys import Keys
 from prompt_toolkit.token import Token
@@ -21,6 +20,7 @@
 from prompt_toolkit.layout import Window, HSplit, FloatContainer, Float
 from prompt_toolkit.layout.containers import ScrollOffsets, \
     ConditionalContainer
+from awsshell.utils import format_json
 
 """An implementation of a selection menu using prompt toolkit.
 
@@ -261,8 +261,7 @@ def return_selection(cli, buf):
             def selection_changed(cli):
                 index = self.menu_control.get_index()
                 info = options_meta[index]
-                formatted_info = json.dumps(info, indent=4, sort_keys=True,
-                                            ensure_ascii=False)
+                formatted_info = format_json(info)
                 buffers['INFO'].text = formatted_info
             default_buf.on_text_changed += selection_changed
 

awsshell/utils.py

@@ -6,9 +6,11 @@
 import tempfile
 import uuid
 import logging
+import json
 
 import awscli
 
+from awscli.utils import json_encoder
 from awsshell.compat import HTMLParser
 
 
@@ -142,3 +144,8 @@ def force_unicode(obj, encoding='utf8'):
         if not isinstance(obj, six.text_type):
             obj = _attempt_decode(obj, encoding)
     return obj
+
+
+def format_json(response):
+    return json.dumps(response, indent=4, default=json_encoder,
+                      ensure_ascii=False, sort_keys=True)

awsshell/wizard.py

@@ -1,6 +1,5 @@
 import sys
 import copy
-import json
 import logging
 import jmespath
 
@@ -9,7 +8,7 @@
 from botocore.exceptions import BotoCoreError, ClientError
 
 from awsshell.resource import index
-from awsshell.utils import force_unicode
+from awsshell.utils import force_unicode, format_json
 from awsshell.selectmenu import select_prompt
 from awsshell.interaction import InteractionLoader, InteractionException
 
@@ -348,7 +347,7 @@ def __init__(self):
         self._variables = {}
 
     def __str__(self):
-        return json.dumps(self._variables, indent=4, sort_keys=True)
+        return format_json(self._variables)
 
     def update(self, environment):
         assert isinstance(environment, Environment)

tests/unit/test_interaction.py

@@ -6,7 +6,7 @@
 from prompt_toolkit.contrib.validators.base import Validator, ValidationError
 from awsshell.interaction import InteractionLoader, InteractionException
 from awsshell.interaction import SimpleSelect, SimplePrompt, FilePrompt
-from awsshell.interaction import FuzzyCompleter, FuzzySelect
+from awsshell.interaction import FuzzyCompleter, FuzzySelect, InfoSelect
 
 
 @pytest.fixture
@@ -88,12 +88,13 @@ def test_simple_select():
     assert xformed == options[1]
 
 
-def test_simple_select_with_path():
+@pytest.mark.parametrize('selector', [SimpleSelect, InfoSelect])
+def test_simple_select_with_path(selector):
     # Verify that SimpleSelect calls prompt and it returns the corresponding
     # item derived from the path.
     prompt = mock.Mock()
     model = {'Path': '[].a'}
-    simple_selector = SimpleSelect(model, 'Promptingu', prompt)
+    simple_selector = selector(model, 'Promptingu', prompt)
     options = [{'a': '1', 'b': 'one'}, {'a': '2', 'b': 'two'}]
     prompt.return_value = ('2', 1)
     xformed = simple_selector.execute(options)

tests/unit/test_utils.py

@@ -1,6 +1,7 @@
 from tests import unittest
 import os
 import tempfile
+import datetime
 import shutil
 import six
 import pytest
@@ -10,6 +11,7 @@
 from awsshell.utils import FileReadError
 from awsshell.utils import temporary_file
 from awsshell.utils import force_unicode
+from awsshell.utils import format_json
 
 
 class TestFSLayer(unittest.TestCase):
@@ -127,3 +129,8 @@ def test_force_unicode_recursion():
     assert isinstance(clean_obj['b']['str'], six.text_type)
     assert clean_obj['c'] is obj['c']
     assert obj == clean_obj
+
+
+def test_format_json():
+    data = {'Key': datetime.datetime(2016, 12, 12)}
+    assert format_json(data) == '{\n    "Key": "2016-12-12T00:00:00"\n}'