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implement support for Lustre server components
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15 files changed

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‎example/assets/js/app.js‎

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@@ -22,6 +22,7 @@ import { Socket } from "phoenix";
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import { LiveSocket } from "phoenix_live_view";
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import { createLissomeHook } from "../../../assets/lissome.mjs";
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import { main as hello } from "../lustre/build/dev/javascript/lustre_app/hello.mjs";
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import "../vendor/lustre-runtime.mjs";
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import topbar from "../vendor/topbar";
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const lustreModules = { hello };

‎example/assets/lustre/src/ffi/lissome_ffi.erl‎

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-module(lissome_ffi).
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-export([
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erlang_version/0,
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atoms_count/0,
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ports_count/0,
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processes_count/0,
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uptime/0,
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total_memory_usage/0
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]).
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erlang_version() ->
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unicode:characters_to_binary(erlang:system_info(system_version)).
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atoms_count() ->
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erlang:system_info(atom_count).
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ports_count() ->
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erlang:system_info(port_count).
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processes_count() ->
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erlang:system_info(process_count).
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uptime() ->
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Uptime = erlang:statistics(wall_clock),
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erlang:element(1, Uptime).
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total_memory_usage() ->
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{total, TotalMemory} = lists:keyfind(total, 1, erlang:memory()),
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TotalMemory.

‎example/assets/lustre/src/monitor.gleam‎

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import gleam/dynamic
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import gleam/dynamic/decode
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import gleam/int
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import lustre
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import lustre/attribute
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import lustre/element.{type Element}
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import lustre/element/html
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import lustre/event
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pub type Model {
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Model(
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erlang_version: String,
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atom_count: Int,
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port_count: Int,
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process_count: Int,
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uptime: Int,
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total_memory_usage: Int,
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)
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}
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pub type Msg {
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UserRequestedReload
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}
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pub fn component() {
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lustre.simple(init, update, view)
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}
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pub fn init(_flags) -> Model {
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compute_model()
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}
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pub fn update(_model: Model, msg: Msg) -> Model {
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case msg {
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UserRequestedReload -> compute_model()
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}
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}
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pub fn view(model: Model) -> Element(Msg) {
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html.div(
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[
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attribute.class(
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"mx-auto mt-10 p-6 bg-white rounded-xl shadow-md space-y-4",
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),
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],
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[
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html.h2(
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[
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attribute.class(
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"text-2xl font-bold text-gray-800 mb-4 flex items-center justify-between",
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),
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],
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[
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html.text("BEAM Info"),
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html.button(
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[
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attribute.class("ml-4 p-2 rounded hover:bg-gray-100"),
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attribute.title("Reload"),
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event.on_click(UserRequestedReload),
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],
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[html.text("🔄")],
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),
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],
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),
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html.dl([attribute.class("divide-y divide-gray-200")], [
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html.div([attribute.class("py-2 flex justify-between")], [
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html.dt([attribute.class("font-medium text-gray-600")], [
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html.text("Erlang Version"),
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]),
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html.dd([attribute.class("text-gray-900")], [
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html.text(model.erlang_version),
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]),
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]),
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html.div([attribute.class("py-2 flex justify-between")], [
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html.dt([attribute.class("font-medium text-gray-600")], [
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html.text("Atoms Count"),
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]),
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html.dd([attribute.class("text-gray-900")], [
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html.text(int.to_string(model.atom_count)),
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]),
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]),
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html.div([attribute.class("py-2 flex justify-between")], [
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html.dt([attribute.class("font-medium text-gray-600")], [
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html.text("Ports Count"),
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]),
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html.dd([attribute.class("text-gray-900")], [
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html.text(int.to_string(model.port_count)),
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]),
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]),
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html.div([attribute.class("py-2 flex justify-between")], [
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html.dt([attribute.class("font-medium text-gray-600")], [
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html.text("Processes Count"),
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]),
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html.dd([attribute.class("text-gray-900")], [
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html.text(int.to_string(model.process_count)),
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]),
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]),
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html.div([attribute.class("py-2 flex justify-between")], [
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html.dt([attribute.class("font-medium text-gray-600")], [
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html.text("Uptime (s)"),
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]),
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html.dd([attribute.class("text-gray-900")], [
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html.text(int.to_string(model.uptime)),
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]),
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]),
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html.div([attribute.class("py-2 flex justify-between")], [
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html.dt([attribute.class("font-medium text-gray-600")], [
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html.text("Total Memory Usage (bytes)"),
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]),
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html.dd([attribute.class("text-gray-900")], [
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html.text(int.to_string(model.total_memory_usage)),
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]),
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]),
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]),
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],
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)
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}
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fn compute_model() -> Model {
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let assert Ok(erlang_version) = decode_to_string(erlang_version())
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let assert Ok(atom_count) = decode_to_int(atom_count())
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let assert Ok(port_count) = decode_to_int(port_count())
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let assert Ok(process_count) = decode_to_int(process_count())
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let assert Ok(uptime) = decode_to_int(uptime())
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let assert Ok(total_memory_usage) = decode_to_int(total_memory_usage())
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Model(
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erlang_version:,
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atom_count:,
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port_count:,
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process_count:,
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uptime:,
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total_memory_usage:,
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)
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}
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fn decode_to_string(value: dynamic.Dynamic) {
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decode.run(value, decode.string)
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}
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fn decode_to_int(value: dynamic.Dynamic) {
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decode.run(value, decode.int)
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}
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@external(erlang, "lissome_ffi", "erlang_version")
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fn erlang_version() -> dynamic.Dynamic
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@external(erlang, "lissome_ffi", "atoms_count")
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fn atom_count() -> dynamic.Dynamic
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@external(erlang, "lissome_ffi", "ports_count")
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fn port_count() -> dynamic.Dynamic
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@external(erlang, "lissome_ffi", "processes_count")
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fn process_count() -> dynamic.Dynamic
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@external(erlang, "lissome_ffi", "uptime")
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fn uptime() -> dynamic.Dynamic
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@external(erlang, "lissome_ffi", "total_memory_usage")
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fn total_memory_usage() -> dynamic.Dynamic

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