Expose parse ast method from AVM (#161)

src/__test__/unit/ast.spec.ts

@@ -0,0 +1,33 @@
+import { Fluence } from '../../index';
+
+describe('Parse ast tests', () => {
+    beforeAll(async () => {
+        await Fluence.start();
+    });
+
+    afterAll(async () => {
+        await Fluence.stop();
+    });
+
+    it('Correct ast should be parsed correctly', async function () {
+        const peer = Fluence.getPeer();
+        const air = `(null)`;
+        const res = await peer.internals.parseAst(air);
+
+        expect(res).toStrictEqual({
+            success: true,
+            data: { Null: null },
+        });
+    });
+
+    it('Incorrect ast should result in corresponding error', async function () {
+        const peer = Fluence.getPeer();
+        const air = `(null`;
+        const res = await peer.internals.parseAst(air);
+
+        expect(res).toStrictEqual({
+            success: false,
+            data: expect.stringContaining('error'),
+        });
+    });
+});

src/internal/FluencePeer.ts

@@ -352,6 +352,34 @@ export class FluencePeer {
      */
     get internals() {
         return {
+            parseAst: async (air: string): Promise<{ success: boolean; data: any }> => {
+                const status = this.getStatus();
+
+                if (!status.isInitialized) {
+                    new Error("Can't use avm: peer is not initialized");
+                }
+
+                const args = JSON.stringify([air]);
+                const rawRes = await this._fluenceAppService!.callService('avm', 'ast', args, undefined);
+                let res;
+                try {
+                    res = JSON.parse(rawRes);
+                    res = res.result as string;
+                    if (res.startsWith('error')) {
+                        return {
+                            success: false,
+                            data: res,
+                        };
+                    } else {
+                        return {
+                            success: true,
+                            data: JSON.parse(res),
+                        };
+                    }
+                } catch (err) {
+                    throw new Error('Failed to call avm. Raw result: ' + rawRes + '. Error: ' + err);
+                }
+            },
             createNewParticle: (script: string, ttl: number = this._defaultTTL) => {
                 const status = this.getStatus();