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use super::{ContextFactory, ContextFactoryHashMap};
use crate::abi::proxy_wasm::traits::{ChildContext, HttpContext, RootContext, StreamContext};
use crate::extension::access_logger::{AccessLogger, AccessLoggerContext};
use crate::extension::error::ModuleError;
use crate::extension::factory::{ExtensionFactory, ExtensionFactoryContext};
use crate::extension::filter::http::{HttpFilter, HttpFilterContext, VoidHttpFilterContext};
use crate::extension::filter::network::{
NetworkFilter, NetworkFilterContext, VoidNetworkFilterContext,
};
use crate::extension::{InstanceId, Result};
pub struct Module {
factories: ContextFactoryHashMap,
}
impl Default for Module {
fn default() -> Self {
Self::new()
}
}
impl Module {
pub fn new() -> Self {
Module {
factories: ContextFactoryHashMap::new(),
}
}
fn add_extension(mut self, name: &'static str, factory: Box<ContextFactory>) -> Result<Self> {
if self.factories.insert(name.to_string(), factory).is_some() {
Err(ModuleError::DuplicateRegistration(name.to_string()).into())
} else {
Ok(self)
}
}
pub fn add_access_logger<T, F>(self, mut new: F) -> Result<Self>
where
T: AccessLogger + 'static,
F: FnMut(InstanceId) -> Result<T> + 'static,
{
let factory = Box::new(move |context_id| -> Result<Box<dyn RootContext>> {
let logger = new(InstanceId::from(context_id))?;
Ok(Box::new(AccessLoggerContext::with_default_ops(logger)))
});
self.add_extension(T::name(), factory)
}
pub fn add_network_filter<T, F>(self, mut new: F) -> Result<Self>
where
T: ExtensionFactory + 'static,
T::Extension: NetworkFilter,
F: FnMut(InstanceId) -> Result<T> + 'static,
{
let factory = Box::new(move |context_id| -> Result<Box<dyn RootContext>> {
let network_filter_factory = new(InstanceId::from(context_id))?;
Ok(Box::new(ExtensionFactoryContext::with_default_ops(
network_filter_factory,
|network_filter_factory, instance_id| -> ChildContext {
let stream_context: Box<dyn StreamContext> =
match <T as ExtensionFactory>::new_extension(
network_filter_factory,
instance_id,
) {
Ok(network_filter) => {
Box::new(NetworkFilterContext::with_default_ops(network_filter))
}
Err(err) => Box::new(VoidNetworkFilterContext::with_default_ops(err)),
};
ChildContext::StreamContext(stream_context)
},
)))
});
self.add_extension(T::name(), factory)
}
pub fn add_http_filter<T, F>(self, mut new: F) -> Result<Self>
where
T: ExtensionFactory + 'static,
T::Extension: HttpFilter,
F: FnMut(InstanceId) -> Result<T> + 'static,
{
let factory = Box::new(move |context_id| -> Result<Box<dyn RootContext>> {
let http_filter_factory = new(InstanceId::from(context_id))?;
Ok(Box::new(ExtensionFactoryContext::with_default_ops(
http_filter_factory,
|http_filter_factory, instance_id| -> ChildContext {
let http_context: Box<dyn HttpContext> =
match <T as ExtensionFactory>::new_extension(
http_filter_factory,
instance_id,
) {
Ok(http_filter) => {
Box::new(HttpFilterContext::with_default_ops(http_filter))
}
Err(err) => Box::new(VoidHttpFilterContext::with_default_ops(err)),
};
ChildContext::HttpContext(http_context)
},
)))
});
self.add_extension(T::name(), factory)
}
}
impl Into<ContextFactoryHashMap> for Module {
fn into(self) -> ContextFactoryHashMap {
self.factories
}
}