Move pledge validation into new function

This is so we can reuse it in two places: while saving a pledge,
and while validating/verifying it.

server/index.js

@@ -102,25 +102,24 @@ router.get('/', async (req, res) => {
   })
 })
 
-router.post('/pledge', async (req, res) => {
-  if (DEBUG) console.debug('New pledge:', req.body)
-
-  // validate pledge
+// function to validate pledges before saving
+function validatePledge(body) {
+  // errors get saved here
   let errors = []
 
-	let submit = req.body.submit
+	let submit = body.submit
   if (submit != 'Save Pledge') {
 		errors.push("This request seems to have been tampered with. Are you sure it wasn't you doing the tampering?")
 	}
 
-  let robo = req.body.robo
+  let robo = body.robo
   if(robo != 'no') {
     errors.push('Only humans are allowed to donate money. Robots are too digital 🙁')
   }
 
-  let amount = req.body.amount
+  let amount = body.amount
   if (!amount || amount == 'custom') {
-    amount = req.body['amount-custom']
+    amount = body['amount-custom']
   }
   if (!amount || amount <= 0) {
     errors.push('Pledge amount too small. Please choose at least a rupee!')
@@ -131,37 +130,32 @@ router.post('/pledge', async (req, res) => {
     errors.push('Invalid amount. Please choose a positive number!')
   }
 
-	let name = req.body.name
+	let name = body.name
 	if (name.length <=0) {
 		errors.push('What is your name? You can be anonymous to the world but at least we should know...')
 	}
 
-	let anonymous = req.body.anonymous == 'on' ? true : false
+	let anonymous = body.anonymous == 'on' ? true : false
 
-	let email = req.body.email
+	let email = body.email
 	if (email.length < 5) {
 		errors.push('Please enter a valid email address')
 	}
 
-	let phone = req.body.phone
+	let phone = body.phone
 
   let retryTimes
   try {
-    retryTimes = req.body['reminder-count']
+    retryTimes = body['reminder-count']
   } catch (err) {
     errors.push('Invalid retry count. Please choose a positive number!')
   }
 
-	let newsletter = req.body.newsletter == 'yes' ? true : false
-	let overseas = req.body.overseas == 'yes' ? true : false
-	let messages = req.body.messages
+	let newsletter = body.newsletter == 'yes' ? true : false
+	let overseas = body.overseas == 'yes' ? true : false
+	let messages = body.messages
 
-	if (!!errors.length) {
-		res.send(`Errors: ${'' + errors}`)
-		return
-	}
-
-	// save the info
+	// enter the info
 	let pledge = new Pledge()
 	pledge.set('was_robot', robo)
 	pledge.set('amount', amount)
@@ -174,8 +168,27 @@ router.post('/pledge', async (req, res) => {
 	pledge.set('get_newsletter', newsletter)
 	pledge.set('other_message', messages)
 
-	if (DEBUG) console.debug (`Saving pledge: ${JSON.stringify(pledge)}`)
+  // return it all!
+  return {
+    pledge: pledge,
+    errors: errors,
+  }
+}
 
+router.post('/pledge', async (req, res) => {
+  if (DEBUG) console.debug('New pledge:', req.body)
+
+  // process the pledge with our handy function
+  let {pledge, errors} = validatePledge(req.body)
+
+  // fail if there were errors
+  if (!!errors.length) {
+		res.send(`Errors: ${'' + errors}`)
+		return
+	}
+
+  // save if there weren't
+	if (DEBUG) console.debug (`Saving pledge: ${JSON.stringify(pledge)}`)
 	try {
 		await pledge.save()
 	} catch (err) {