base code for import parse

Author: jrainville

lib/core/file.js

@@ -13,7 +13,19 @@ class File {
     this.resolver = options.resolver;
   }
 
-  downloadFile (callback) {
+  parseFileForImport(content, callback) {
+    if (this.filename.indexOf('.sol') < 0) {
+      // Only supported in Solidity
+      return callback();
+    }
+    const regex = /import "([a-zA-Z0-9_\-.\\\/]+)";/g;
+    let matches;
+    while ((matches = regex.exec(content))) {
+      console.log('Need to download', matches[1]);
+    }
+  }
+
+  downloadFile (filename, callback) {
     const self = this;
     async.waterfall([
       function makeTheDir(next) {
@@ -41,6 +53,11 @@ class File {
       },
       function readFile(next) {
         fs.readFile(self.path, next);
+      },
+      function parseForImports(content, next) {
+        self.parseFileForImport(content, (err) => {
+          next(err, content);
+        });
       }
     ], (err, content) => {
       if (err) {

test/contracts/simple_storage.sol

@@ -1,6 +1,8 @@
 pragma solidity ^0.4.7;
 contract SimpleStorage {
   uint public storedData;
+  import "ownable.sol";
+  import "ownable2.sol";
 
   function SimpleStorage(uint initialValue) {
     storedData = initialValue;

test/file.js

@@ -0,0 +1,13 @@
+/*globals describe, it*/
+const File = require('../lib/core/file');
+const fs = require('fs-extra');
+
+describe('embark.File', function () {
+  describe('parseFileForImport', () => {
+    it('should find all the imports', function () {
+      const contract = fs.readFileSync('./test/contracts/simple_storage.sol').toString();
+      const file = new File({filename: 'simple_storage.sol'});
+      file.parseFileForImport(contract);
+    });
+  });
+});