diff --git a/src/ecaCompiler/compiler.ts b/src/ecaCompiler/compiler.ts
new file mode 100644
index 0000000..386e5c4
--- /dev/null
+++ b/src/ecaCompiler/compiler.ts
@@ -0,0 +1,77 @@
+import * as y3 from 'y3-helper';
+import * as vscode from 'vscode';
+
+export class Event {
+    constructor(private json: y3.json.JObject) { }
+}
+
+export class Action {
+    name: string;
+    args: Exp[] = [];
+    constructor(private json: y3.json.JObject) {
+        this.name = json.action_type as string;
+        for (let arg of json.args_list as y3.json.JObject[]) {
+            this.args.push(new Exp(arg));
+        }
+    }
+
+    make(): string {
+        return `${this.name}(${this.args.map((arg) => arg.make()).join(', ')})`;
+    }
+}
+
+export class Exp {
+    name: string;
+    type: number;
+    args: Exp[] = [];
+    constructor(private json: y3.json.JObject) {
+        this.name = json.sub_type as string;
+        this.type = json.arg_type as number;
+        for (let arg of json.args_list as y3.json.JObject[]) {
+            this.args.push(new Exp(arg));
+        }
+    }
+
+    make(): string {
+        return `${this.name}(${this.args.map((arg) => arg.make()).join(', ')})`;
+    }
+}
+
+export class ECA {
+    name: string;
+    events: Event[] = [];
+    actions: Action[] = [];
+    constructor(private json: y3.json.JObject) {
+        this.name = json.trigger_name as string;
+        for (let event of json.event as y3.json.JObject[]) {
+            this.events.push(new Event(event));
+        }
+        for (let action of json.action as y3.json.JObject[]) {
+            this.actions.push(new Action(action));
+        }
+    }
+
+    private makeActionPart(): string {
+        return this.actions.map((action) => action.make()).join('\n    ');
+    }
+
+    make(): string {
+        return this.makeActionPart();
+    }
+}
+
+export class Compiler {
+    public async compile(input: string | vscode.Uri | y3.json.JObject): Promise<ECA> {
+        let json: y3.json.JObject;
+        if (typeof input === 'string') {
+            json = y3.json.parse(input);
+        } else if (input instanceof vscode.Uri) {
+            let file = await y3.fs.readFile(input.fsPath);
+            y3.assert(file, 'File not found: ' + input.fsPath);
+            json = y3.json.parse(file.string);
+        } else {
+            json = input;
+        }
+        return new ECA(json);
+    }
+}
diff --git a/src/ecaCompiler/index.ts b/src/ecaCompiler/index.ts
new file mode 100644
index 0000000..0305f6a
--- /dev/null
+++ b/src/ecaCompiler/index.ts
@@ -0,0 +1 @@
+import * as compiler from './compiler';