compose pill: Add has_unconverted_data() helper.

frontend_tests/node_tests/compose_pm_pill.js

@@ -152,3 +152,32 @@ run_test('pills', () => {
     assert(appendValue_called);
     assert(text_cleared);
 });
+
+run_test('has_unconverted_data', () => {
+    compose_pm_pill.widget = {
+        is_pending: () => true,
+    };
+
+    // If the pill itself has pending data, we have unconverted
+    // data.
+    assert.equal(compose_pm_pill.has_unconverted_data(), true);
+
+    compose_pm_pill.widget = {
+        is_pending: () => false,
+        items: () => [{user_id: 99}],
+    };
+
+    // Our pill is complete and all items containt user_id, so
+    // we do NOT have unconverted data.
+    assert.equal(compose_pm_pill.has_unconverted_data(), false);
+
+    compose_pm_pill.widget = {
+        is_pending: () => false,
+        items: () => [{user_id: 99}, {email: 'random@mit.edu'}],
+    };
+
+    // One of our items only knows email (as in a bridge-with-zephyr
+    // scenario where we might not have registered the user yet), so
+    // we have some unconverted data.
+    assert.equal(compose_pm_pill.has_unconverted_data(), true);
+});

static/js/compose_pm_pill.js

@@ -41,6 +41,10 @@ exports.get_user_ids = function () {
     return user_pill.get_user_ids(exports.widget);
 };
 
+exports.has_unconverted_data = function () {
+    return user_pill.has_unconverted_data(exports.widget);
+};
+
 exports.get_user_ids_string = function () {
     var user_ids = exports.get_user_ids();
     var sorted_user_ids = util.sorted_ids(user_ids);

static/js/user_pill.js

@@ -76,6 +76,21 @@ exports.get_user_ids = function (pill_widget) {
     return user_ids;
 };
 
+exports.has_unconverted_data = function (pill_widget) {
+    // This returns true if we either have text that hasn't been
+    // turned into pills or email-only pills (for Zephyr).
+    if (pill_widget.is_pending()) {
+        return true;
+    }
+
+    var items = pill_widget.items();
+    var has_unknown_items = _.any(items, function (item) {
+        return item.user_id === undefined;
+    });
+
+    return has_unknown_items;
+};
+
 exports.typeahead_source = function (pill_widget) {
     var items = people.get_realm_persons();
     var taken_user_ids = exports.get_user_ids(pill_widget);