Add logger.log action (#198)

* Add logger.log Action

* Simple schema

* Validate printf

* Improve error message

* Undo unfix tests :)

esphomeyaml/automation.py

@@ -86,9 +86,12 @@ def validate_automation(extra_schema=None, extra_validators=None, single=False):
             try:
                 # First try as a sequence of actions
                 return [schema({CONF_THEN: value})]
-            except vol.Invalid:
+            except vol.Invalid as err:
                 # Next try as a sequence of automations
+                try:
                     return vol.Schema([schema])(value)
+                except vol.Invalid as err2:
+                    raise vol.MultipleInvalid([err, err2])
         elif isinstance(value, dict):
             if CONF_THEN in value:
                 return [schema(value)]

esphomeyaml/components/logger.py

@@ -1,10 +1,14 @@
+import re
+
 import voluptuous as vol
 
+from esphomeyaml.automation import ACTION_REGISTRY, LambdaAction
 import esphomeyaml.config_validation as cv
-from esphomeyaml.const import CONF_BAUD_RATE, CONF_ID, CONF_LEVEL, CONF_LOGS, \
-    CONF_TX_BUFFER_SIZE
-from esphomeyaml.core import ESPHomeYAMLError
-from esphomeyaml.helpers import App, Pvariable, add, esphomelib_ns, global_ns
+from esphomeyaml.const import CONF_ARGS, CONF_BAUD_RATE, CONF_FORMAT, CONF_ID, CONF_LEVEL, \
+    CONF_LOGS, CONF_TAG, CONF_TX_BUFFER_SIZE
+from esphomeyaml.core import ESPHomeYAMLError, Lambda
+from esphomeyaml.helpers import App, Pvariable, TemplateArguments, add, esphomelib_ns, global_ns, \
+    process_lambda, RawExpression, statement
 
 LOG_LEVELS = {
     'NONE': global_ns.ESPHOMELIB_LOG_LEVEL_NONE,
@@ -16,6 +20,15 @@ LOG_LEVELS = {
     'VERY_VERBOSE': global_ns.ESPHOMELIB_LOG_LEVEL_VERY_VERBOSE,
 }
 
+LOG_LEVEL_TO_ESP_LOG = {
+    'ERROR': global_ns.ESP_LOGE,
+    'WARN': global_ns.ESP_LOGW,
+    'INFO': global_ns.ESP_LOGI,
+    'DEBUG': global_ns.ESP_LOGD,
+    'VERBOSE': global_ns.ESP_LOGV,
+    'VERY_VERBOSE': global_ns.ESP_LOGVV,
+}
+
 LOG_LEVEL_SEVERITY = ['NONE', 'ERROR', 'WARN', 'INFO', 'DEBUG', 'VERBOSE', 'VERY_VERBOSE']
 
 # pylint: disable=invalid-name
@@ -59,3 +72,57 @@ def required_build_flags(config):
     if CONF_LEVEL in config:
         return u'-DESPHOMELIB_LOG_LEVEL={}'.format(str(LOG_LEVELS[config[CONF_LEVEL]]))
     return None
+
+
+def maybe_simple_message(schema):
+    def validator(value):
+        if isinstance(value, dict):
+            return vol.Schema(schema)(value)
+        return vol.Schema(schema)({CONF_FORMAT: value})
+    return validator
+
+
+def validate_printf(value):
+    # https://stackoverflow.com/questions/30011379/how-can-i-parse-a-c-format-string-in-python
+    # pylint: disable=anomalous-backslash-in-string
+    cfmt = u"""\
+    (                                  # start of capture group 1
+    %                                  # literal "%"
+    (?:                                # first option
+    (?:[-+0 #]{0,5})                   # optional flags
+    (?:\d+|\*)?                        # width
+    (?:\.(?:\d+|\*))?                  # precision
+    (?:h|l|ll|w|I|I32|I64)?            # size
+    [cCdiouxXeEfgGaAnpsSZ]             # type
+    ) |                                # OR
+    %%)                                # literal "%%"
+    """
+    matches = re.findall(cfmt, value[CONF_FORMAT], flags=re.X)
+    if len(matches) != len(value[CONF_ARGS]):
+        raise vol.Invalid(u"Found {} printf-patterns ({}), but {} args were given!"
+                          u"".format(len(matches), u', '.join(matches), len(value[CONF_ARGS])))
+    return value
+
+
+CONF_LOGGER_LOG = 'logger.log'
+LOGGER_LOG_ACTION_SCHEMA = vol.All(maybe_simple_message({
+    vol.Required(CONF_FORMAT): cv.string,
+    vol.Optional(CONF_ARGS, default=list): vol.All(cv.ensure_list, [cv.lambda_]),
+    vol.Optional(CONF_LEVEL, default="DEBUG"): vol.All(vol.Upper, cv.one_of(*LOG_LEVEL_TO_ESP_LOG)),
+    vol.Optional(CONF_TAG, default="main"): cv.string,
+}), validate_printf)
+
+
+@ACTION_REGISTRY.register(CONF_LOGGER_LOG, LOGGER_LOG_ACTION_SCHEMA)
+def logger_log_action_to_code(config, action_id, arg_type):
+    template_arg = TemplateArguments(arg_type)
+    esp_log = LOG_LEVEL_TO_ESP_LOG[config[CONF_LEVEL]]
+    args = [RawExpression(unicode(x)) for x in config[CONF_ARGS]]
+
+    text = unicode(statement(esp_log(config[CONF_TAG], config[CONF_FORMAT], *args)))
+
+    for lambda_ in process_lambda(Lambda(text), [(arg_type, 'x')]):
+        yield None
+    rhs = LambdaAction.new(template_arg, lambda_)
+    type = LambdaAction.template(template_arg)
+    yield Pvariable(action_id, rhs, type=type)

esphomeyaml/const.py

@@ -346,6 +346,8 @@ CONF_PM_2_5 = 'pm_2_5'
 CONF_PM_10_0 = 'pm_10_0'
 CONF_FORMALDEHYDE = 'formaldehyde'
 CONF_ON_TAG = 'on_tag'
+CONF_ARGS = 'args'
+CONF_FORMAT = 'format'
 CONF_COLOR_CORRECT = 'color_correct'
 CONF_ON_JSON_MESSAGE = 'on_json_message'
 

tests/test1.yaml

@@ -193,6 +193,11 @@ sensor:
     on_raw_value:
       - lambda: >-
           ESP_LOGD("main", "Got raw value %f", x);
+      - logger.log:
+          level: DEBUG
+          format: "Got raw value %f"
+          args: ['x']
+      - logger.log: "Got raw value NAN"
       - mqtt.publish:
           topic: some/topic
           payload: Hello