From f393109c4339a4acaf85d56c670ee65969eb62d3 Mon Sep 17 00:00:00 2001
From: Iskren Chernev <iskren.chernev@gmail.com>
Date: Tue, 27 Oct 2015 01:01:38 -0700
Subject: [PATCH] Add weekday overflow check

Fixes half of #2457
---
 src/lib/create/check-overflow.js |  5 ++++-
 src/lib/create/from-array.js     | 19 +++++++++++++++----
 src/lib/units/constants.js       |  1 +
 src/test/moment/week_year.js     |  7 +++++++
 4 files changed, 27 insertions(+), 5 deletions(-)

diff --git a/src/lib/create/check-overflow.js b/src/lib/create/check-overflow.js
index f76d907aa..41b539fb7 100644
--- a/src/lib/create/check-overflow.js
+++ b/src/lib/create/check-overflow.js
@@ -1,5 +1,5 @@
 import { daysInMonth } from '../units/month';
-import { YEAR, MONTH, DATE, HOUR, MINUTE, SECOND, MILLISECOND, WEEK } from '../units/constants';
+import { YEAR, MONTH, DATE, HOUR, MINUTE, SECOND, MILLISECOND, WEEK, WEEKDAY } from '../units/constants';
 import getParsingFlags from '../create/parsing-flags';
 
 export default function checkOverflow (m) {
@@ -22,6 +22,9 @@ export default function checkOverflow (m) {
         if (getParsingFlags(m)._overflowWeeks && overflow === -1) {
             overflow = WEEK;
         }
+        if (getParsingFlags(m)._overflowWeekday && overflow === -1) {
+            overflow = WEEKDAY;
+        }
 
         getParsingFlags(m).overflow = overflow;
     }
diff --git a/src/lib/create/from-array.js b/src/lib/create/from-array.js
index 51bddc6a6..67d0bed99 100644
--- a/src/lib/create/from-array.js
+++ b/src/lib/create/from-array.js
@@ -83,7 +83,7 @@ export function configFromArray (config) {
 }
 
 function dayOfYearFromWeekInfo(config) {
-    var w, weekYear, week, weekday, dow, doy, temp;
+    var w, weekYear, week, weekday, dow, doy, temp, weekdayOverflow;
 
     w = config._w;
     if (w.GG != null || w.W != null || w.E != null) {
@@ -97,6 +97,9 @@ function dayOfYearFromWeekInfo(config) {
         weekYear = defaults(w.GG, config._a[YEAR], weekOfYear(createLocal(), 1, 4).year);
         week = defaults(w.W, 1);
         weekday = defaults(w.E, 1);
+        if (weekday < 1 || weekday > 7) {
+            weekdayOverflow = true;
+        }
     } else {
         dow = config._locale._week.dow;
         doy = config._locale._week.doy;
@@ -110,19 +113,27 @@ function dayOfYearFromWeekInfo(config) {
             if (weekday < dow) {
                 ++week;
             }
+            if (weekday < 0 || weekday > 6) {
+                weekdayOverflow = true;
+            }
         } else if (w.e != null) {
             // local weekday -- counting starts from begining of week
             weekday = w.e + dow;
+            if (w.e < 0 || w.e > 6) {
+                weekdayOverflow = true;
+            }
         } else {
             // default to begining of week
             weekday = dow;
         }
     }
-    if (1 <= week && week <= weeksInYear(weekYear, dow, doy)) {
+    if (week < 1 || week > weeksInYear(weekYear, dow, doy)) {
+        getParsingFlags(config)._overflowWeeks = true;
+    } else if (weekdayOverflow != null) {
+        getParsingFlags(config)._overflowWeekday = true;
+    } else {
         temp = dayOfYearFromWeeks(weekYear, week, weekday, doy, dow);
         config._a[YEAR] = temp.year;
         config._dayOfYear = temp.dayOfYear;
-    } else {
-        getParsingFlags(config)._overflowWeeks = true;
     }
 }
diff --git a/src/lib/units/constants.js b/src/lib/units/constants.js
index 0a11938be..70bf1b26e 100644
--- a/src/lib/units/constants.js
+++ b/src/lib/units/constants.js
@@ -6,3 +6,4 @@ export var MINUTE = 4;
 export var SECOND = 5;
 export var MILLISECOND = 6;
 export var WEEK = 7;
+export var WEEKDAY = 8;
diff --git a/src/test/moment/week_year.js b/src/test/moment/week_year.js
index 0c2ac6078..5cbad4f41 100644
--- a/src/test/moment/week_year.js
+++ b/src/test/moment/week_year.js
@@ -102,6 +102,13 @@ test('weeks overflow', function (assert) {
     assert.equal(7, moment.utc('2004-W00-1', moment.ISO_8601, true).parsingFlags().overflow, 'there is no 0th week');
 });
 
+test('weekday overflow', function (assert) {
+    assert.equal(8, moment.utc('2004-W30-0', moment.ISO_8601, true).parsingFlags().overflow, 'there is no 0 iso weekday');
+    assert.equal(8, moment.utc('2004-W30-8', moment.ISO_8601, true).parsingFlags().overflow, 'there is no 8 iso weekday');
+    assert.equal(8, moment.utc('2004-w30-7', 'gggg-[w]ww-e', true).parsingFlags().overflow, 'there is no 7 \'e\' weekday');
+    assert.equal(8, moment.utc('2004-w30-7', 'gggg-[w]ww-d', true).parsingFlags().overflow, 'there is no 7 \'d\' weekday');
+});
+
 test('week year setter works', function (assert) {
     for (var year = 2000; year <= 2020; year += 1) {
         assert.equal(moment.utc('2012-12-31T00:00:00.000Z').isoWeekYear(year).isoWeekYear(), year, 'setting iso-week-year to ' + year);
-- 
2.47.2