1 files changed, 90 insertions, 0 deletions
diff --git a/static/compiler.js b/static/compiler.js
new file mode 100644
index 0000000..021992c
--- /dev/null
+++ b/static/compiler.js
@@ -0,0 +1,90 @@
+let compiler;
+
+export default async function initGleamCompiler() {
+  const wasm = await import("/compiler/gleam_wasm.js");
+  await wasm.default();
+  wasm.initialise_panic_hook();
+  if (!compiler) {
+    compiler = new Compiler(wasm);
+  }
+  return compiler;
+}
+
+class Compiler {
+  #wasm;
+  #nextId = 0;
+  #projects = new Map();
+
+  constructor(wasm) {
+    this.#wasm = wasm;
+  }
+
+  get wasm() {
+    return this.#wasm;
+  }
+
+  newProject() {
+    const id = this.#nextId++;
+    const project = new Project(id);
+    this.#projects.set(id, new WeakRef(project));
+    return project;
+  }
+
+  garbageCollectProjects() {
+    const gone = [];
+    for (const [id, project] of this.#projects) {
+      if (!project.deref()) gone.push(id);
+    }
+    for (const id of gone) {
+      this.#projects.delete(id);
+      this.#wasm.delete_project(id);
+    }
+  }
+}
+
+class Project {
+  #id;
+
+  constructor(id) {
+    this.#id = id;
+  }
+
+  get projectId() {
+    return this.#id;
+  }
+
+  writeModule(moduleName, code) {
+    compiler.wasm.write_module(this.#id, moduleName, code);
+  }
+
+  compilePackage(target) {
+    compiler.garbageCollectProjects();
+    compiler.wasm.reset_warnings(this.#id);
+    compiler.wasm.compile_package(this.#id, target);
+  }
+
+  readCompiledJavaScript(moduleName) {
+    return compiler.wasm.read_compiled_javascript(this.#id, moduleName);
+  }
+
+  readCompiledErlang(moduleName) {
+    return compiler.wasm.read_compiled_erlang(this.#id, moduleName);
+  }
+
+  resetFilesystem() {
+    compiler.wasm.reset_filesystem(this.#id);
+  }
+
+  delete() {
+    compiler.wasm.delete_project(this.#id);
+  }
+
+  takeWarnings() {
+    const warnings = [];
+    while (true) {
+      const warning = compiler.wasm.pop_warning(this.#id);
+      if (!warning) return warnings;
+      warnings.push(warning.trimStart());
+    }
+  }
+}