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Add operable:count command

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nmohoric committed Aug 28, 2017
1 parent c24018a commit fc216a05baf95875bc35463d1f99fa17374e59c2
Showing with 134 additions and 1 deletion.
  1. +1 −1 config/config.exs
  2. +72 −0 lib/cog/commands/count.ex
  3. +61 −0 test/commands/count_test.exs
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@@ -30,7 +30,7 @@ end
# NOTE: Do not change this value unless you know what you're doing.
# ========================================================================
config :cog, :embedded_bundle_version, "0.18.1"
config :cog, :embedded_bundle_version, "0.18.2"
# ========================================================================
# Chat Adapters
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@@ -0,0 +1,72 @@
defmodule Cog.Commands.Count do
use Cog.Command.GenCommand.Base,
bundle: Cog.Util.Misc.embedded_bundle
alias Cog.Command.Service.MemoryClient
@description "Return the count of the values in the input list"
@arguments "[path]"
@examples """
seed '[{"a": 2}, {"a": -1}, {"b": 3}]' | count
> 3
seed '[{"a": 2}, {"a": -1}, {"b": 3}]' | count a
> 2
seed '[{"a": {"b": 2}}, {"b": {"b": -1}}, {"a": {"c": 3}}]' | count a.b
> 1
"""
rule "when command is #{Cog.Util.Misc.embedded_bundle}:count allow"
def handle_message(req, state) do
root = req.services_root
token = req.service_token
key = req.invocation_id
step = req.invocation_step
value = req.cog_env
args = req.args
MemoryClient.accum(root, token, key, value)
case step do
step when step in ["first", "", nil] ->
{:reply, req.reply_to, nil, state}
"last" ->
accumulated_value = MemoryClient.fetch(root, token, key)
{:ok, value} = count_by(accumulated_value, args)
MemoryClient.delete(root, token, key)
{:reply, req.reply_to, value, state}
end
end
defp count_by([%{}], []),
do: {:ok, 0}
defp count_by(items, []),
do: {:ok, Enum.count(items)}
defp count_by(items, [path]) do
path_list = path_to_list(path)
case bad_path(items, path_list) do
true ->
{:ok, 0}
false ->
count = Enum.count(items, &get_in(&1, path_list))
{:ok, count}
end
end
defp bad_path(items, path_list) do
Enum.all?(items, fn item ->
item
|> get_in(path_list)
|> is_nil
end)
end
defp path_to_list(path) do
String.split(path, ".")
end
end
@@ -0,0 +1,61 @@
defmodule Cog.Test.Commands.CountTest do
use Cog.CommandCase, command_module: Cog.Commands.Count
test "basic count" do
inv_id = "basic_count"
memory_accum(inv_id, %{"a" => 1})
memory_accum(inv_id, %{"b" => 3})
response = new_req(invocation_id: inv_id, cog_env: %{"a" => 2})
|> send_req()
|> unwrap()
assert(response == 3)
end
test "count by simple key" do
inv_id = "simple_key_count"
memory_accum(inv_id, %{"a" => 1})
memory_accum(inv_id, %{"b" => 3})
response = new_req(invocation_id: inv_id, cog_env: %{"a" => 2}, args: ["a"])
|> send_req()
|> unwrap()
assert(response == 2)
end
test "count by complex key" do
inv_id = "complex_key_count"
memory_accum(inv_id, %{"a" => %{"b" => 1}})
memory_accum(inv_id, %{"a" => %{"b" => 3}})
response = new_req(invocation_id: inv_id, cog_env: %{"a" => %{"c" => 2}}, args: ["a.b"])
|> send_req()
|> unwrap()
assert(response == 2)
end
test "count by incorrect key" do
inv_id = "complex_incorrect"
memory_accum(inv_id, %{"a" => %{"b" => 1}})
memory_accum(inv_id, %{"a" => %{"b" => 3}})
response = new_req(invocation_id: inv_id, cog_env: %{"a" => %{"c" => 2}}, args: ["c.d"])
|> send_req()
|> unwrap()
assert(response == 0)
end
test "count of nothing" do
inv_id = "complex_nothing"
response = new_req(invocation_id: inv_id, cog_env: %{}, args: [])
|> send_req()
|> unwrap()
assert(response == 0)
end
end

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