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89 lines
3 KiB
Python
89 lines
3 KiB
Python
import hashlib
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from esphome import config_validation as cv, automation
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from esphome import codegen as cg
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from esphome.const import (
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CONF_ID,
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CONF_INITIAL_VALUE,
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CONF_RESTORE_VALUE,
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CONF_TYPE,
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CONF_VALUE,
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)
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from esphome.core import coroutine_with_priority
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CODEOWNERS = ["@esphome/core"]
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globals_ns = cg.esphome_ns.namespace("globals")
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GlobalsComponent = globals_ns.class_("GlobalsComponent", cg.Component)
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RestoringGlobalsComponent = globals_ns.class_("RestoringGlobalsComponent", cg.Component)
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RestoringGlobalStringComponent = globals_ns.class_(
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"RestoringGlobalStringComponent", cg.Component
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)
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GlobalVarSetAction = globals_ns.class_("GlobalVarSetAction", automation.Action)
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CONF_MAX_RESTORE_DATA_LENGTH = "max_restore_data_length"
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MULTI_CONF = True
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CONFIG_SCHEMA = cv.Schema(
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{
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cv.Required(CONF_ID): cv.declare_id(GlobalsComponent),
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cv.Required(CONF_TYPE): cv.string_strict,
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cv.Optional(CONF_INITIAL_VALUE): cv.string_strict,
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cv.Optional(CONF_RESTORE_VALUE, default=False): cv.boolean,
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cv.Optional(CONF_MAX_RESTORE_DATA_LENGTH): cv.int_range(0, 254),
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}
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).extend(cv.COMPONENT_SCHEMA)
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# Run with low priority so that namespaces are registered first
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@coroutine_with_priority(-100.0)
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async def to_code(config):
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type_ = cg.RawExpression(config[CONF_TYPE])
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restore = config[CONF_RESTORE_VALUE]
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# Special casing the strings to their own class with a different save/restore mechanism
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if str(type_) == "std::string" and restore:
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template_args = cg.TemplateArguments(
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type_, config.get(CONF_MAX_RESTORE_DATA_LENGTH, 63) + 1
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)
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type = RestoringGlobalStringComponent
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else:
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template_args = cg.TemplateArguments(type_)
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type = RestoringGlobalsComponent if restore else GlobalsComponent
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res_type = type.template(template_args)
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initial_value = None
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if CONF_INITIAL_VALUE in config:
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initial_value = cg.RawExpression(config[CONF_INITIAL_VALUE])
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rhs = type.new(template_args, initial_value)
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glob = cg.Pvariable(config[CONF_ID], rhs, res_type)
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await cg.register_component(glob, config)
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if restore:
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value = config[CONF_ID].id
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if isinstance(value, str):
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value = value.encode()
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hash_ = int(hashlib.md5(value).hexdigest()[:8], 16)
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cg.add(glob.set_name_hash(hash_))
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@automation.register_action(
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"globals.set",
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GlobalVarSetAction,
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cv.Schema(
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{
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cv.Required(CONF_ID): cv.use_id(GlobalsComponent),
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cv.Required(CONF_VALUE): cv.templatable(cv.string_strict),
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}
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),
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)
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async def globals_set_to_code(config, action_id, template_arg, args):
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full_id, paren = await cg.get_variable_with_full_id(config[CONF_ID])
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template_arg = cg.TemplateArguments(full_id.type, *template_arg)
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var = cg.new_Pvariable(action_id, template_arg, paren)
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templ = await cg.templatable(
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config[CONF_VALUE], args, None, to_exp=cg.RawExpression
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)
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cg.add(var.set_value(templ))
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return var
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