Expressions support

index.js

@@ -1,4 +1,4 @@
-module.exports = nanogql
+'use strict'
 
 var getOpname = /query ([\w\d-_]+)? ?\(.*?\)? \{/
 
@@ -16,3 +16,28 @@ function nanogql (str) {
 function merge (str, chunk) {
   return str + chunk
 }
+
+function taggify () {
+  var args = new Array(arguments.length)
+  for (var i = 0; i < args.length; i++) {
+    args[i] = arguments[i]
+  }
+
+  var string = args.shift()
+  var raw = string.raw
+  var result = ''
+
+  args.forEach(applySubstitutions)
+  result += raw[raw.length - 1]
+  return nanogql(result)
+
+  function applySubstitutions (arg, i) {
+    var lit = raw[i]
+    if (Array.isArray(arg)) {
+      arg = arg.join('')
+    }
+    result += lit + arg
+  }
+}
+
+module.exports = taggify

test.js

@@ -48,3 +48,27 @@ tape('should have a name', function (assert) {
   })
   assert.end()
 })
+
+tape('should support expressions', function (assert) {
+  var query = gql`
+    query foo ($number_of_repos:Int!) {
+      viewer {
+        ${'na' + 'me'}
+        repositories(last: $number_of_repos) {
+          ${'nodes'} {
+            name
+          }
+        }
+      }
+    }
+  `
+
+  var variables = { number_of_repos: 3 }
+  var data = query(variables)
+  spok(assert, data, {
+    query: spok.string,
+    operationName: 'foo',
+    variables: JSON.stringify(variables)
+  })
+  assert.end()
+})