feat: add GraphQL server and resolvers

lib/plugins.js

@@ -25,6 +25,9 @@ const customers = require('./customers')
 const commissionMath = require('./commission-math')
 const loyalty = require('./loyalty')
 const transactionBatching = require('./tx-batching')
+const state = require('./middlewares/state')
+
+const VERSION = require('../package.json').version
 
 const { CASSETTE_MAX_CAPACITY, CASH_OUT_DISPENSE_READY, CONFIRMATION_CODE } = require('./constants')
 
@@ -281,6 +284,78 @@ function plugins (settings, deviceId) {
       })
   }
 
+  function staticConfigQueries () {
+    const massageCoins = _.map(_.pick([
+      'batchable',
+      'cashInCommission',
+      'cashInFee',
+      'cashOutCommission',
+      'cryptoCode',
+      'cryptoNetwork',
+      'cryptoUnits',
+      'display',
+      'minimumTx'
+    ]))
+
+    return pollQueries()
+      .then(_.flow(
+        _.pick([
+          'areThereAvailablePromoCodes',
+          'coins',
+          'configVersion',
+          'timezone'
+        ]),
+        _.update('coins', massageCoins),
+        _.set('serverVersion', VERSION)
+      ))
+  }
+
+  function dynamicConfigQueries () {
+    const massageCassettes = cassettes =>
+      cassettes ?
+        _.flow(
+          cassettes => _.set('physical', _.get('cassettes', cassettes), cassettes),
+          cassettes => _.set('virtual', _.get('virtualCassettes', cassettes), cassettes),
+          _.unset('cassettes'),
+          _.unset('virtualCassettes')
+        )(cassettes) :
+        null
+
+    return pollQueries()
+      .then(_.flow(
+        _.pick(['balances', 'cassettes', 'coins', 'rates']),
+
+        _.update('cassettes', massageCassettes),
+
+        /* [{ cryptoCode, rates }, ...] => [[cryptoCode, rates], ...] */
+        _.update('coins', _.map(({ cryptoCode, rates }) => [cryptoCode, rates])),
+
+        /* [{ cryptoCode: balance }, ...] => [[cryptoCode, { balance }], ...] */
+        _.update('balances', _.flow(
+          _.toPairs,
+          _.map(([cryptoCode, balance]) => [cryptoCode, { balance }])
+        )),
+
+        /* Group the separate objects by cryptoCode */
+        /* { balances, coins, rates } => { cryptoCode: { balance, ask, bid, cashIn, cashOut }, ... } */
+        ({ balances, cassettes, coins, rates }) => ({
+          cassettes,
+          coins: _.flow(
+            _.reduce(
+              (ret, [cryptoCode, obj]) => _.update(cryptoCode, _.assign(obj), ret),
+              rates
+            ),
+
+            /* { cryptoCode: { balance, ask, bid, cashIn, cashOut }, ... } => [[cryptoCode, { balance, ask, bid, cashIn, cashOut }], ...] */
+            _.toPairs,
+
+            /* [[cryptoCode, { balance, ask, bid, cashIn, cashOut }], ...] => [{ cryptoCode, balance, ask, bid, cashIn, cashOut }, ...] */
+            _.map(([cryptoCode, obj]) => _.set('cryptoCode', cryptoCode, obj))
+          )(_.concat(balances, coins))
+        })
+      ))
+  }
+
   function sendCoins (tx) {
     return wallet.supportsBatching(settings, tx.cryptoCode)
       .then(supportsBatching => {
@@ -854,6 +929,8 @@ function plugins (settings, deviceId) {
     getRawRates,
     buildRatesNoCommission,
     pollQueries,
+    staticConfigQueries,
+    dynamicConfigQueries,
     sendCoins,
     newAddress,
     isHd,