Add parsing amount, storage of address from thread

Amount is parsed from comment having "@NAME" where name is env. variable.
Address from commiteth's comment, stored in a global variable. Destroyed
when reinstantiating container.
(fixes aragon/autobounty#1)

Revert Dockerfile change

Revert index.js whitespace

Dockerfile

@@ -2,3 +2,6 @@ FROM node:7-onbuild
 
 ENV PORT 8080
 EXPOSE 8080
+
+ENV NAME autobounty
+ENV STANDARD_BOUNTY 0.001

index.js

@@ -4,13 +4,16 @@
  * awards that bounty to the address posted earlier in the thread (by the
  * commiteth bot).
  * TODO tests
+ * REVIEW parsing, non-persisting storage of addresses, hardcoded string length. 
+ * Depends on commiteth version as of 2017-06-10.
  */
 
 const SignerProvider = require('ethjs-provider-signer');
 const sign = require('ethjs-signer').sign;
 const Eth = require('ethjs-query');
 
-const address = process.env.ADDRESS
+const address = process.env.ADDRESS;
+const name = process.env.NAME;
 
 const provider = new SignerProvider(process.env.NODE, {
   signTransaction: (rawTx, cb) => cb(null, sign(rawTx, process.env.KEY)),
@@ -24,17 +27,45 @@ var express = require('express'),
     bodyParser = require('body-parser'),
     jsonParser = bodyParser.json();
 
-app.use(jsonParser);
 app.use(cors());
 
+// Store issue ids and their bounty addresses
+var issueData = {};
+
 // Receive a POST request at the address specified by an env. var.
-app.post('/address/:address', function(req, res, next){
+app.post('/address/:address', jsonParser, function(req, res, next){
+  if (!req.body)
+    return res.sendStatus(400);
+  var commentBody = req.body.comment.body;
+  var issueId = req.body.issue.id;
+  var namePosition = commentBody.search("@" + name);
+  // Store toAddress from commiteth
+  if (namePosition == -1) {
+    issueData[issueId] = {"toAddress": commentBody.substring(commentBody.search("Contract address:") + 18, commentBody.search("Contract address:") + 60)}
+    console.log(issueData);
+    return res.status(204);
+  }
+  else {
+    var postNameWords = commentBody.substring(namePosition + 1 + name.length + 1).trim().split(' ');
+    var amount = 0;
+    if (postNameWords.length > 0) {
+      if(postNameWords[0] == "standard") {
+        amount = process.env.STANDARD_BOUNTY;
+      }
+      else {
+        amount = parseFloat(postNameWords[0]);
+      }
+    }
+    console.log("Trying to give " + amount + " ETH to " + issueData[issueId].toAddress + " for issue " + issueId);
+    issueData[issueId].amount = amount;
+
+    // Conduct the transaction
     eth.getTransactionCount(address, (err, nonce) => {
       eth.sendTransaction({
         from: address, // Specified in webhook, secret
-      to: req.params.address, // TODO replace with address from earlier in the thread
+        to: issueData[issueId].toAddress, // Address from earlier in the thread
         gas: 100000,
-      value: (parseFloat(process.env.AMOUNT) || 1.5) * 1e18, // TODO replace with parsed amount from comments
+        value: issueData[issueId].amount,
         data: '0xde5f72fd', // sha3('faucet()')
         nonce,
       }, (err, txID) => {
@@ -48,6 +79,7 @@ app.post('/address/:address', function(req, res, next){
         }
       });
     });
+  }
 });
 
 const port = process.env.PORT || 8181