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#include "cethcan.h"
struct bean {
struct can_user *u;
char *name;
unsigned logical_addr;
uint8_t raw;
json_t *vals[2];
time_t change, valid;
};
static void bean_json_handler(void *arg, json_t *json, enum json_subtype type)
{
struct bean *b = arg;
json_t *bobj = json_object();
json_object_set_new(bobj, "klass", json_string("beancounter"));
json_object_set_new(bobj, "addr", json_integer(b->logical_addr));
json_object_set_new(bobj, "raw", json_integer(b->raw));
json_object_set_new(bobj, "value", json_boolean(b->raw & 1));
json_object_set_new(bobj, "text", json_incref(b->vals[b->raw & 1]));
if (type != JSON_LONGPOLL)
json_object_set_new(bobj, "ts", json_integer(b->valid));
json_object_set_new(bobj, "tschg", json_integer(b->change));
json_object_set_new(json, b->name, bobj);
}
static void bean_can_handler(void *arg, struct can_message *msg)
{
struct bean *b = arg;
unsigned laddr;
uint8_t dval;
if ((msg->daddr & CANA_PROTOCOL) != CANA_SENSOR)
return;
laddr = msg->daddr & 0xfff;
if (b->logical_addr < laddr)
return;
if (b->logical_addr - laddr >= msg->dlc)
return;
dval = msg->bytes[b->logical_addr - laddr];
time(&b->valid);
if (dval != b->raw || b->change == 0) {
b->raw = dval;
time(&b->change);
lprintf("%s: set %02x", b->u->name, dval);
json_bump_longpoll();
}
}
int bean_init_conf(json_t *config)
{
struct bean *b;
json_t *vals;
if (!json_is_object(config)) {
lprintf("light config must be an object/dictionary");
return 1;
}
if (!json_is_integer(json_object_get(config, "addr"))) {
lprintf("light config must have an 'addr' key");
return 1;
}
if (!json_is_string(json_object_get(config, "name"))) {
lprintf("light config must have a 'name' key");
return 1;
}
vals = json_object_get(config, "values");
if (!json_is_array(vals) || json_array_size(vals) != 2) {
lprintf("light config must have a 'values' array of len 2");
return 1;
}
b = calloc(sizeof(*b), 1);
b->name = strdup(json_string_value(json_object_get(config, "name")));
b->logical_addr = json_integer_value(json_object_get(config, "addr"));
b->vals[0] = json_array_get(vals, 0);
json_incref(b->vals[0]);
b->vals[1] = json_array_get(vals, 1);
json_incref(b->vals[1]);
b->u = can_register_alloc(b, bean_can_handler, "bean[%s]", b->name);
b->u->json = bean_json_handler;
return 0;
}
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