X-Git-Url: https://git.cworth.org/git?a=blobdiff_plain;f=turbot%2Finteraction.py;h=94787b40fbc28e15c7773f0ca497b5dcf4bea1b9;hb=c6ad0733c2613b899a30291b14222ef6c322c6cb;hp=f9640ca3473b3abb8adc8e742b9065112c389158;hpb=61f3273b217ea1be55adc24c294a4318a98733ef;p=turbot

diff --git a/turbot/interaction.py b/turbot/interaction.py
index f9640ca..94787b4 100644
--- a/turbot/interaction.py
+++ b/turbot/interaction.py
@@ -2,14 +2,25 @@ from slack.errors import SlackApiError
 from turbot.blocks import (
     input_block, section_block, text_block, multi_select_block, checkbox_block
 )
-from turbot.hunt import find_hunt_for_hunt_id, hunt_blocks
+from turbot.hunt import (
+    find_hunt_for_hunt_id,
+    hunt_blocks,
+    hunt_puzzles_for_hunt_id
+)
 from turbot.puzzle import (
     find_puzzle_for_url,
+    find_puzzle_for_sort_key,
     find_puzzle_for_puzzle_id,
     puzzle_update_channel_and_sheet,
+    puzzle_channel_name,
     puzzle_id_from_name,
-    puzzle_blocks
+    puzzle_blocks,
+    puzzle_sort_key,
+    puzzle_copy
 )
+from turbot.round import round_quoted_puzzles_titles_answers
+from turbot.help import turbot_help
+from turbot.have_you_tried import have_you_tried
 import turbot.rot
 import turbot.sheets
 import turbot.slack
@@ -75,6 +86,50 @@ def multi_static_select(turb, payload):
 
 actions['multi_static_select'] = {"*": multi_static_select}
 
+def edit(turb, body, args):
+
+    """Implementation of the `/edit` command
+
+    This can be used as `/edit` (with no arguments) in either a hunt
+    or a puzzle channel to edit that hunt or puzzle. It can also be
+    called explicitly as `/edit hunt` to edit a hunt even from a
+    puzzle channel.
+
+    In any case, the operation is identical to `/hunt edit` or
+    `/puzzle edit`.
+    """
+
+    # If we have an explicit argument, do what it says to do
+    if args == "hunt":
+        return edit_hunt_command(turb, body)
+
+    if args == "puzzle":
+        return edit_puzzle_command(turb, body)
+
+    # Any other argument string is an error
+    if args:
+        return bot_reply("Error: Unexpected argument: {}\n".format(args) +
+                         "Usage: `/edit puzzle`, `/edit hunt`, or " +
+                         "`/edit` (to choose based on channel)"
+                         )
+
+    # No explicit argument, so select what to edit based on the current channel
+    channel_id = body['channel_id'][0]
+    trigger_id = body['trigger_id'][0]
+
+    puzzle = puzzle_for_channel(turb, channel_id)
+    if puzzle:
+        return edit_puzzle(turb, puzzle, trigger_id)
+
+    hunt = hunt_for_channel(turb, channel_id)
+    if hunt:
+        return edit_hunt(turb, hunt, trigger_id)
+
+    return bot_reply("Sorry, `/edit` only works in a hunt or puzzle channel.")
+
+commands["/edit"] = edit
+
+
 def edit_puzzle_command(turb, body):
     """Implementation of the `/puzzle edit` command
 
@@ -91,23 +146,17 @@ def edit_puzzle_command(turb, body):
 
     return edit_puzzle(turb, puzzle, trigger_id)
 
-    return lambda_ok
-
 def edit_puzzle_button(turb, payload):
     """Handler for the action of user pressing an edit_puzzle button"""
 
     action_id = payload['actions'][0]['action_id']
-    response_url = payload['response_url']
     trigger_id = payload['trigger_id']
 
-    (hunt_id, puzzle_id) = action_id.split('-', 1)
+    (hunt_id, sort_key) = action_id.split('-', 1)
 
-    puzzle = find_puzzle_for_puzzle_id(turb, hunt_id, puzzle_id)
+    puzzle = find_puzzle_for_sort_key(turb, hunt_id, sort_key)
 
     if not puzzle:
-        requests.post(response_url,
-                      json = {"text": "Error: Puzzle not found!"},
-                      headers = {"Content-type": "application/json"})
         return bot_reply("Error: Puzzle not found.")
 
     return edit_puzzle(turb, puzzle, trigger_id)
@@ -160,6 +209,8 @@ def edit_puzzle(turb, puzzle, trigger_id):
             input_block("Puzzle URL", "url", "External URL of puzzle",
                         initial_value=puzzle.get("url", None),
                         optional=True),
+            checkbox_block("Is this a meta puzzle?", "Meta", "meta",
+                           checked=(puzzle.get('type', 'plain') == 'meta')),
             * round_options_block,
             input_block("New round(s)", "new_rounds",
                         "New round(s) this puzzle belongs to " +
@@ -212,6 +263,10 @@ def edit_puzzle_submission(turb, payload, metadata):
     url = state['url']['url']['value']
     if url:
         puzzle['url'] = url
+    if state['meta']['meta']['selected_options']:
+        puzzle['type'] = 'meta'
+    else:
+        puzzle['type'] = 'plain'
     rounds = [option['value'] for option in
               state['rounds']['rounds']['selected_options']]
     if rounds:
@@ -259,9 +314,27 @@ def edit_puzzle_submission(turb, payload, metadata):
             )
 
     # Get old puzzle from the database (to determine what's changed)
-    old_puzzle = find_puzzle_for_puzzle_id(turb,
-                                           puzzle['hunt_id'],
-                                           puzzle['puzzle_id'])
+    old_puzzle = find_puzzle_for_sort_key(turb,
+                                          puzzle['hunt_id'],
+                                          puzzle['SK'])
+
+    # If we are changing puzzle type (meta -> plain or plain -> meta)
+    # the the sort key has to change, so compute the new one and delete
+    # the old item from the database.
+    #
+    # XXX: We should really be using a transaction here to combine the
+    # delete_item and the put_item into a single transaction, but
+    # the boto interface is annoying in that transactions are only on
+    # the "Client" object which has a totally different interface than
+    # the "Table" object I've been using so I haven't figured out how
+    # to do that yet.
+
+    if puzzle['type'] != old_puzzle.get('type', 'plain'):
+        puzzle['SK'] = puzzle_sort_key(puzzle)
+        turb.table.delete_item(Key={
+            'hunt_id': old_puzzle['hunt_id'],
+            'SK': old_puzzle['SK']
+        })
 
     # Update the puzzle in the database
     turb.table.put_item(Item=puzzle)
@@ -294,9 +367,151 @@ def edit_puzzle_submission(turb, payload, metadata):
 
     return lambda_ok
 
-def new_hunt(turb, payload):
+def edit_hunt_command(turb, body):
+    """Implementation of the `/hunt edit` command
+
+    As dispatched from the hunt() function.
+    """
+
+    channel_id = body['channel_id'][0]
+    trigger_id = body['trigger_id'][0]
+
+    hunt = hunt_for_channel(turb, channel_id)
+
+    if not hunt:
+        return bot_reply("Sorry, this does not appear to be a hunt channel.")
+
+    return edit_hunt(turb, hunt, trigger_id)
+
+def edit_hunt_button(turb, payload):
+    """Handler for the action of user pressing an edit_hunt button"""
+
+    hunt_id = payload['actions'][0]['action_id']
+    trigger_id = payload['trigger_id']
+
+    hunt = find_hunt_for_hunt_id(turb, hunt_id)
+
+    if not hunt:
+        return bot_reply("Error: Hunt not found.")
+
+    return edit_hunt(turb, hunt, trigger_id)
+
+actions['button']['edit_hunt'] = edit_hunt_button
+
+def edit_hunt(turb, hunt, trigger_id):
+    """Common code for implementing an edit hunt dialog
+
+    This implementation is common whether the edit operation was invoked
+    by a button (edit_hunt_button) or a command (edit_hunt_command).
+    """
+
+    view = {
+        "type": "modal",
+        "private_metadata": json.dumps({
+            "hunt_id": hunt["hunt_id"],
+            "SK": hunt["SK"],
+            "is_hunt": hunt["is_hunt"],
+            "channel_id": hunt["channel_id"],
+            "sheet_url": hunt["sheet_url"],
+            "folder_id": hunt["folder_id"],
+        }),
+        "title": { "type": "plain_text", "text": "Edit Hunt" },
+        "submit": { "type": "plain_text", "text": "Save" },
+        "blocks": [
+            input_block("Hunt name", "name", "Name of the hunt",
+                        initial_value=hunt["name"]),
+            input_block("Hunt URL", "url", "External URL of hunt",
+                        initial_value=hunt.get("url", None),
+                        optional=True),
+            checkbox_block("Is this hunt active?", "Active", "active",
+                           checked=(hunt.get('active', False)))
+        ]
+    }
+
+    result = turb.slack_client.views_open(trigger_id=trigger_id,
+                                          view=view)
+
+    if result['ok']:
+        submission_handlers[result['view']['id']] = edit_hunt_submission
+
+    return lambda_ok
+
+def edit_hunt_submission(turb, payload, metadata):
+    """Handler for the user submitting the edit hunt modal
+
+    This is the modal view presented by the edit_hunt function above.
+    """
+
+    hunt={}
+
+    # First, read all the various data from the request
+    meta = json.loads(metadata)
+    hunt['hunt_id'] = meta['hunt_id']
+    hunt['SK'] = meta['SK']
+    hunt['is_hunt'] = meta['is_hunt']
+    hunt['channel_id'] = meta['channel_id']
+    hunt['sheet_url'] = meta['sheet_url']
+    hunt['folder_id'] = meta['folder_id']
+
+    state = payload['view']['state']['values']
+    user_id = payload['user']['id']
+
+    hunt['name'] = state['name']['name']['value']
+    url = state['url']['url']['value']
+    if url:
+        hunt['url'] = url
+
+    if state['active']['active']['selected_options']:
+        hunt['active'] = True
+    else:
+        hunt['active'] = False
+
+    # Update the hunt in the database
+    turb.table.put_item(Item=hunt)
+
+    # Inform the hunt channel about the edit
+    edit_message = "Hunt edited by <@{}>".format(user_id)
+    blocks = [
+        section_block(text_block(edit_message)),
+        section_block(text_block("Hunt name: {}".format(hunt['name']))),
+    ]
+
+    url = hunt.get('url', None)
+    if url:
+        blocks.append(
+            section_block(text_block("Hunt URL: {}".format(hunt['url'])))
+        )
+
+    slack_send_message(
+        turb.slack_client, hunt['channel_id'],
+        edit_message, blocks=blocks)
+
+    return lambda_ok
+
+def new_hunt_command(turb, body):
+    """Implementation of the '/hunt new' command
+
+    As dispatched from the hunt() function.
+    """
+
+    trigger_id = body['trigger_id'][0]
+
+    return new_hunt(turb, trigger_id)
+
+def new_hunt_button(turb, payload):
     """Handler for the action of user pressing the new_hunt button"""
 
+    trigger_id = payload['trigger_id']
+
+    return new_hunt(turb, trigger_id)
+
+def new_hunt(turb, trigger_id):
+    """Common code for implementing a new hunt dialog
+
+    This implementation is common whether the operations was invoked
+    by a button (new_hunt_button) or a command (new_hunt_command).
+    """
+
     view = {
         "type": "modal",
         "private_metadata": json.dumps({}),
@@ -312,7 +527,7 @@ def new_hunt(turb, payload):
         ],
     }
 
-    result = turb.slack_client.views_open(trigger_id=payload['trigger_id'],
+    result = turb.slack_client.views_open(trigger_id=trigger_id,
                                           view=view)
     if (result['ok']):
         submission_handlers[result['view']['id']] = new_hunt_submission
@@ -359,7 +574,8 @@ def new_hunt_submission(turb, payload, metadata):
                 {'AttributeName': 'SK', 'AttributeType': 'S'},
                 {'AttributeName': 'channel_id', 'AttributeType': 'S'},
                 {'AttributeName': 'is_hunt', 'AttributeType': 'S'},
-                {'AttributeName': 'url', 'AttributeType': 'S'}
+                {'AttributeName': 'url', 'AttributeType': 'S'},
+                {'AttributeName': 'puzzle_id', 'AttributeType': 'S'}
             ],
             ProvisionedThroughput={
                 'ReadCapacityUnits': 5,
@@ -403,6 +619,16 @@ def new_hunt_submission(turb, payload, metadata):
                     'Projection': {
                         'ProjectionType': 'ALL'
                     }
+                },
+                {
+                    'IndexName': 'puzzle_id_index',
+                    'KeySchema': [
+                        {'AttributeName': 'hunt_id', 'KeyType': 'HASH'},
+                        {'AttributeName': 'puzzle_id', 'KeyType': 'RANGE'},
+                    ],
+                    'Projection': {
+                        'ProjectionType': 'ALL'
+                    }
                 }
             ]
         )
@@ -639,6 +865,24 @@ def puzzle(turb, body, args):
 
     blocks = puzzle_blocks(puzzle, include_rounds=True)
 
+    # For a meta puzzle, also display the titles and solutions for all
+    # puzzles in the same round.
+    if puzzle.get('type', 'plain') == 'meta':
+        puzzles = hunt_puzzles_for_hunt_id(turb, puzzle['hunt_id'])
+
+        # Drop this puzzle itself from the report
+        puzzles = [p for p in puzzles if p['puzzle_id'] != puzzle['puzzle_id']]
+
+        for round in puzzle.get('rounds', [None]):
+            answers = round_quoted_puzzles_titles_answers(round, puzzles)
+            blocks += [
+                section_block(text_block(
+                    "*Feeder solutions from round {}*".format(
+                        round if round else "<none>"
+                    ))),
+                section_block(text_block(answers))
+            ]
+
     requests.post(response_url,
                   json = {'blocks': blocks},
                   headers = {'Content-type': 'application/json'}
@@ -648,6 +892,27 @@ def puzzle(turb, body, args):
 
 commands["/puzzle"] = puzzle
 
+def new(turb, body, args):
+    """Implementation of the `/new` command
+
+    This can be used to create a new hunt ("/new hunt") or a new
+    puzzle ("/new puzzle" or simply "/new"). So puzzle creation is the
+    default behavior (as it is much more common).
+
+    This operations are identical to the existing "/hunt new" and
+    "/puzzle new". I don't know that that redundancy is actually
+    helpful in the interface. But at least having both allows us to
+    experiment and decide which is more natural and should be kept
+    around long-term.
+    """
+
+    if args == 'hunt':
+        return new_hunt_command(turb, body)
+
+    return new_puzzle(turb, body)
+
+commands["/new"] = new
+
 def new_puzzle(turb, body):
     """Implementation of the "/puzzle new" command
 
@@ -663,13 +928,20 @@ def new_puzzle(turb, body):
         return bot_reply("Sorry, this channel doesn't appear to "
                          + "be a hunt or puzzle channel")
 
+    # We used puzzle (if available) to select the initial round(s)
+    puzzle = puzzle_for_channel(turb, channel_id)
+    initial_rounds = None
+    if puzzle:
+        initial_rounds=puzzle.get("rounds", None)
+
     round_options = hunt_rounds(turb, hunt['hunt_id'])
 
     if len(round_options):
         round_options_block = [
             multi_select_block("Round(s)", "rounds",
                                "Existing round(s) this puzzle belongs to",
-                               round_options)
+                               round_options,
+                               initial_options=initial_rounds)
         ]
     else:
         round_options_block = []
@@ -686,6 +958,7 @@ def new_puzzle(turb, body):
             input_block("Puzzle name", "name", "Name of the puzzle"),
             input_block("Puzzle URL", "url", "External URL of puzzle",
                         optional=True),
+            checkbox_block("Is this a meta puzzle?", "Meta", "meta"),
             * round_options_block,
             input_block("New round(s)", "new_rounds",
                         "New round(s) this puzzle belongs to " +
@@ -714,8 +987,18 @@ def new_puzzle_submission(turb, payload, metadata):
     hunt_id = meta['hunt_id']
 
     state = payload['view']['state']['values']
-    name = state['name']['name']['value']
+
+    # And start loading data into a puzzle dict
+    puzzle = {}
+    puzzle['hunt_id'] = hunt_id
+    puzzle['name'] = state['name']['name']['value']
     url = state['url']['url']['value']
+    if url:
+        puzzle['url'] = url
+    if state['meta']['meta']['selected_options']:
+        puzzle['type'] = 'meta'
+    else:
+        puzzle['type'] = 'plain'
     if 'rounds' in state:
         rounds = [option['value'] for option in
                   state['rounds']['rounds']['selected_options']]
@@ -723,8 +1006,17 @@ def new_puzzle_submission(turb, payload, metadata):
         rounds = []
     new_rounds = state['new_rounds']['new_rounds']['value']
 
+    # Create a Slack-channel-safe puzzle_id
+    puzzle['puzzle_id'] = puzzle_id_from_name(puzzle['name'])
+
     # Before doing anything, reject this puzzle if a puzzle already
-    # exists with the same URL.
+    # exists with the same puzzle_id or url
+    existing = find_puzzle_for_puzzle_id(turb, hunt_id, puzzle['puzzle_id'])
+    if existing:
+        return submission_error(
+            "name",
+            "Error: This name collides with an existing puzzle.")
+
     if url:
         existing = find_puzzle_for_url(turb, hunt_id, url)
         if existing:
@@ -732,23 +1024,6 @@ def new_puzzle_submission(turb, payload, metadata):
                 "url",
                 "Error: A puzzle with this URL already exists.")
 
-    # Create a Slack-channel-safe puzzle_id
-    puzzle_id = puzzle_id_from_name(name)
-
-    # Create a channel for the puzzle
-    hunt_dash_channel = "{}-{}".format(hunt_id, puzzle_id)
-
-    try:
-        response = turb.slack_client.conversations_create(
-            name=hunt_dash_channel)
-    except SlackApiError as e:
-        return submission_error(
-            "name",
-            "Error creating Slack channel {}: {}"
-            .format(hunt_dash_channel, e.response['error']))
-
-    channel_id = response['channel']['id']
-
     # Add any new rounds to the database
     if new_rounds:
         for round in new_rounds.split(','):
@@ -765,21 +1040,31 @@ def new_puzzle_submission(turb, payload, metadata):
                 }
             )
 
-    # Insert the newly-created puzzle into the database
-    item={
-        "hunt_id": hunt_id,
-        "SK": "puzzle-{}".format(puzzle_id),
-        "puzzle_id": puzzle_id,
-        "channel_id": channel_id,
-        "solution": [],
-        "status": 'unsolved',
-        "name": name,
-    }
-    if url:
-        item['url'] = url
     if rounds:
-        item['rounds'] = rounds
-    turb.table.put_item(Item=item)
+        puzzle['rounds'] = rounds
+
+    puzzle['solution'] = []
+    puzzle['status'] = 'unsolved'
+
+    # Create a channel for the puzzle
+    channel_name = puzzle_channel_name(puzzle)
+
+    try:
+        response = turb.slack_client.conversations_create(
+            name=channel_name)
+    except SlackApiError as e:
+        return submission_error(
+            "name",
+            "Error creating Slack channel {}: {}"
+            .format(channel_name, e.response['error']))
+
+    puzzle['channel_id'] = response['channel']['id']
+
+    # Finally, compute the appropriate sort key
+    puzzle["SK"] = puzzle_sort_key(puzzle)
+
+    # Insert the newly-created puzzle into the database
+    turb.table.put_item(Item=puzzle)
 
     return lambda_ok
 
@@ -797,8 +1082,8 @@ def state(turb, body, args):
         return bot_reply(
             "Sorry, the /state command only works in a puzzle channel")
 
-    # Make a copy of the puzzle object
-    puzzle = old_puzzle.copy()
+    # Make a deep copy of the puzzle object
+    puzzle = puzzle_copy(old_puzzle)
 
     # Update the puzzle in the database
     puzzle['state'] = args
@@ -810,13 +1095,79 @@ def state(turb, body, args):
 
 commands["/state"] = state
 
+def tag(turb, body, args):
+    """Implementation of the `/tag` command.
+
+    Arg is either a tag to add (optionally prefixed with '+'), or if
+    prefixed with '-' is a tag to remove.
+    """
+
+    if not args:
+        return bot_reply("Usage: `/tag [+]TAG_TO_ADD` "
+                         + "or `/tag -TAG_TO_REMOVE`.")
+
+    channel_id = body['channel_id'][0]
+
+    old_puzzle = puzzle_for_channel(turb, channel_id)
+
+    if not old_puzzle:
+        return bot_reply(
+            "Sorry, the /tag command only works in a puzzle channel")
+
+    if args[0] == '-':
+        tag = args[1:]
+        action = 'remove'
+    else:
+        tag = args
+        if tag[0] == '+':
+            tag = tag[1:]
+        action = 'add'
+
+    # Force tag to all uppercase
+    tag = tag.upper()
+
+    # Reject a tag that is not alphabetic or underscore A-Z_
+    if not re.match(r'^[A-Z0-9_]*$', tag):
+        return bot_reply("Sorry, tags can only contain letters, numbers, "
+                         + "and the underscore character.")
+
+    if action == 'remove':
+        if 'tags' not in old_puzzle or tag not in old_puzzle['tags']:
+            return bot_reply("Nothing to do. This puzzle is not tagged "
+                             + "with the tag: {}".format(tag))
+    else:
+        if 'tags' in old_puzzle and tag in old_puzzle['tags']:
+            return bot_reply("Nothing to do. This puzzle is already tagged "
+                             + "with the tag: {}".format(tag))
+
+    # OK. Error checking is done. Let's get to work
+
+    # Make a deep copy of the puzzle object
+    puzzle = puzzle_copy(old_puzzle)
+
+    if action == 'remove':
+        puzzle['tags'] = [t for t in puzzle['tags'] if t != tag]
+    else:
+        if 'tags' not in puzzle:
+            puzzle['tags'] = [tag]
+        else:
+            puzzle['tags'].append(tag)
+
+    turb.table.put_item(Item=puzzle)
+
+    puzzle_update_channel_and_sheet(turb, puzzle, old_puzzle=old_puzzle)
+
+    return lambda_ok
+
+commands["/tag"] = tag
+
 def solved(turb, body, args):
     """Implementation of the /solved command
 
     The args string should be a confirmed solution."""
 
     channel_id = body['channel_id'][0]
-    user_name = body['user_name'][0]
+    user_id = body['user_id'][0]
 
     old_puzzle = puzzle_for_channel(turb, channel_id)
 
@@ -827,8 +1178,8 @@ def solved(turb, body, args):
         return bot_reply(
             "Error, no solution provided. Usage: `/solved SOLUTION HERE`")
 
-    # Make a copy of the puzzle object
-    puzzle = old_puzzle.copy()
+    # Make a deep copy of the puzzle object
+    puzzle = puzzle_copy(old_puzzle)
 
     # Set the status and solution fields in the database
     puzzle['status'] = 'solved'
@@ -840,7 +1191,7 @@ def solved(turb, body, args):
     # Report the solution to the puzzle's channel
     slack_send_message(
         turb.slack_client, channel_id,
-        "Puzzle mark solved by {}: `{}`".format(user_name, args))
+        "Puzzle mark solved by <@{}>: `{}`".format(user_id, args))
 
     # Also report the solution to the hunt channel
     hunt = find_hunt_for_hunt_id(turb, puzzle['hunt_id'])
@@ -873,14 +1224,22 @@ def hunt(turb, body, args):
     character in a term). All terms must match on a puzzle in order
     for that puzzle to be included. But a puzzle will be considered to
     match if any of the puzzle title, round title, puzzle URL, puzzle
-    state, or puzzle solution match. Matching will be performed
-    without regard to case sensitivity and the search terms can
-    include regular expression syntax.
+    state, puzzle type, tags, or puzzle solution match. Matching will
+    be performed without regard to case sensitivity and the search
+    terms can include regular expression syntax.
+
     """
 
     channel_id = body['channel_id'][0]
     response_url = body['response_url'][0]
 
+    # First, farm off "/hunt new" and "/hunt edit" a separate commands
+    if args == "new":
+        return new_hunt_command(turb, body)
+
+    if args == "edit":
+        return edit_hunt_command(turb, body)
+
     terms = None
     if args:
         # The first word can be a puzzle status and all remaining word
@@ -910,10 +1269,11 @@ def hunt(turb, body, args):
 
     blocks = hunt_blocks(turb, hunt, puzzle_status=status, search_terms=terms)
 
-    requests.post(response_url,
-                  json = { 'blocks': blocks },
-                  headers = {'Content-type': 'application/json'}
-                  )
+    for block in blocks:
+        requests.post(response_url,
+                      json = { 'blocks': block },
+                      headers = {'Content-type': 'application/json'}
+                      )
 
     return lambda_ok
 
@@ -984,11 +1344,56 @@ def round(turb, body, args):
                          limit_to_rounds=puzzle.get('rounds', [])
                          )
 
-    requests.post(response_url,
-                  json = { 'blocks': blocks },
-                  headers = {'Content-type': 'application/json'}
-                  )
+    for block in blocks:
+        requests.post(response_url,
+                      json = { 'blocks': block },
+                      headers = {'Content-type': 'application/json'}
+                      )
 
     return lambda_ok
 
 commands["/round"] = round
+
+def help_command(turb, body, args):
+    """Implementation of the /help command
+
+    Displays help on how to use Turbot.
+    """
+
+    channel_id = body['channel_id'][0]
+    response_url = body['response_url'][0]
+    user_id = body['user_id'][0]
+
+    # Process "/help me" first. It calls out to have_you_tried rather
+    # than going through our help system.
+    #
+    # Also, it reports in the current channel, (where all other help
+    # output is reported privately to the invoking user).
+    if args == "me":
+        to_try = "In response to <@{}> asking `/help me`:\n\n{}\n".format(
+            user_id, have_you_tried())
+
+        # We'll try first to reply directly to the channel (for the benefit
+        # of anyone else in the same channel that might be stuck too.
+        #
+        # But if this doesn't work, (direct message or private channel),
+        # then we can instead reply with an ephemeral message by using
+        # the response_url.
+        try:
+            turb.slack_client.chat_postMessage(
+                channel=channel_id, text=to_try)
+        except SlackApiError:
+            requests.post(response_url,
+                          json = {"text": to_try},
+                          headers = {"Content-type": "application/json"})
+        return lambda_ok
+
+    help_string = turbot_help(args)
+
+    requests.post(response_url,
+                  json = {"text": help_string},
+                  headers = {"Content-type": "application/json"})
+
+    return lambda_ok
+
+commands["/help"] = help_command