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add prometheus metrics for analog/scheduler/custom #2962

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This commit is contained in:
MichaelDvP
2026-02-16 15:56:23 +01:00
parent ced7051ce7
commit 4326fb931b
8 changed files with 136 additions and 17 deletions
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57
src/web/WebCustomEntityService.cpp
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@@ -343,6 +343,15 @@ bool WebCustomEntityService::get_value_info(JsonObject output, const char * cmd)
return true;
}
if (!strcmp(cmd, F_(metrics))) {
std::string metrics = get_metrics_prometheus();
if (!metrics.empty()) {
output["api_data"] = metrics;
return true;
}
return false;
}
// specific value info
const char * attribute_s = Command::get_attribute(cmd);
for (auto const & entity : *customEntityItems_) {
@@ -354,6 +363,54 @@ bool WebCustomEntityService::get_value_info(JsonObject output, const char * cmd)
return false; // not found
}
// generate Prometheus metrics format from custom entities
std::string WebCustomEntityService::get_metrics_prometheus() {
std::string result;
result.reserve(customEntityItems_->size() * 140);
char val[10];
for (CustomEntityItem & entity : *customEntityItems_) {
if (entity.hide || entity.name[0] == '\0') {
continue;
}
result += (std::string) "# HELP emsesp_" + entity.name + " " + entity.name;
if (entity.uom != 0) {
result += (std::string) ", " + EMSdevice::uom_to_string(entity.uom);
}
result += (std::string) ", readable, visible" + (entity.writeable ? ", writable\n" : "\n");
result += (std::string) "# TYPE emsesp_" + entity.name + " gauge\n";
result += (std::string) "emsesp_" + entity.name + " ";
switch (entity.value_type) {
case DeviceValueType::BOOL:
result += (std::string)(entity.value == 0 ? "0" : "1");
break;
case DeviceValueType::INT8:
result += (std::string)Helpers::render_value(val, entity.factor * (int8_t)entity.value, 2);
break;
case DeviceValueType::UINT8:
result += (std::string)Helpers::render_value(val, entity.factor * (uint8_t)entity.value, 2);
break;
case DeviceValueType::INT16:
result += (std::string)Helpers::render_value(val, entity.factor * (int16_t)entity.value, 2);
break;
case DeviceValueType::UINT16:
result += (std::string)Helpers::render_value(val, entity.factor * (uint16_t)entity.value, 2);
break;
case DeviceValueType::UINT24:
case DeviceValueType::TIME:
case DeviceValueType::UINT32:
result += (std::string)Helpers::render_value(val, entity.factor * entity.value, 2);
break;
default:
if (entity.data.length() > 0) {
result += entity.data;
}
break;
}
result += (std::string) "\n";
}
return result;
}
// build the json for specific entity
void WebCustomEntityService::get_value_json(JsonObject output, CustomEntityItem const & entity) {
output["name"] = (const char *)entity.name;