Add a way to retrieve a UTC now datetime in Liquid

src/OrchardCore.Modules/OrchardCore.Liquid/Filters/TimeZoneFilter.cs → src/OrchardCore.Modules/OrchardCore.Liquid/Filters/LocalTimeZoneFilter.cs

@@ -7,11 +7,11 @@
 
 namespace OrchardCore.Liquid.Filters
 {
-    public class TimeZoneFilter : ILiquidFilter
+    public class LocalTimeZoneFilter : ILiquidFilter
     {
         private readonly ILocalClock _localClock;
 
-        public TimeZoneFilter(ILocalClock localClock)
+        public LocalTimeZoneFilter(ILocalClock localClock)
         {
             _localClock = localClock;
         }
@@ -43,11 +43,9 @@ public async ValueTask<FluidValue> ProcessAsync(FluidValue input, FilterArgument
                     case DateTime dateTime:
                         value = dateTime;
                         break;
-
                     case DateTimeOffset dateTimeOffset:
                         value = dateTimeOffset;
                         break;
-
                     default:
                         return NilValue.Instance;
                 }

src/OrchardCore.Modules/OrchardCore.Liquid/Filters/UtcTimeZoneFilter.cs

@@ -0,0 +1,57 @@
+using System;
+using System.Globalization;
+using System.Threading.Tasks;
+using Fluid;
+using Fluid.Values;
+using OrchardCore.Modules;
+
+namespace OrchardCore.Liquid.Filters
+{
+    public class UtcTimeZoneFilter : ILiquidFilter
+    {
+        private readonly ILocalClock _localClock;
+
+        public UtcTimeZoneFilter(ILocalClock localClock)
+        {
+            _localClock = localClock;
+        }
+
+        public async ValueTask<FluidValue> ProcessAsync(FluidValue input, FilterArguments arguments, LiquidTemplateContext ctx)
+        {
+            DateTimeOffset value;
+
+            if (input.Type == FluidValues.String)
+            {
+                var stringValue = input.ToStringValue();
+
+                if (stringValue == "now" || stringValue == "today")
+                {
+                    value = await _localClock.LocalNowAsync;
+                }
+                else
+                {
+                    if (!DateTimeOffset.TryParse(stringValue, ctx.Options.CultureInfo, DateTimeStyles.AssumeUniversal, out value))
+                    {
+                        return NilValue.Instance;
+                    }
+                }
+            }
+            else
+            {
+                switch (input.ToObjectValue())
+                {
+                    case DateTime dateTime:
+                        value = dateTime;
+                        break;
+                    case DateTimeOffset dateTimeOffset:
+                        value = dateTimeOffset;
+                        break;
+                    default:
+                        return NilValue.Instance;
+                }
+            }
+
+            return new ObjectValue(await _localClock.ConvertToUtcAsync(value.DateTime));
+        }
+    }
+}

src/OrchardCore.Modules/OrchardCore.Liquid/Startup.cs

@@ -65,7 +65,8 @@ public override void ConfigureServices(IServiceCollection services)
                 options.Filters.AddFilter("json", JsonFilter.Json);
                 options.Filters.AddFilter("jsonparse", JsonParseFilter.JsonParse);
             })
-            .AddLiquidFilter<TimeZoneFilter>("local")
+            .AddLiquidFilter<LocalTimeZoneFilter>("local")
+            .AddLiquidFilter<UtcTimeZoneFilter>("utc")
             .AddLiquidFilter<SlugifyFilter>("slugify")
             .AddLiquidFilter<LiquidFilter>("liquid")
             .AddLiquidFilter<ContentUrlFilter>("href")

src/docs/reference/modules/Liquid/README.md

@@ -107,6 +107,22 @@ Output
 Wednesday, 02 August 2017 11:54:48
 ```
 
+### `utc`
+
+Converts a local date and time to the UTC date and time based on the site settings.
+
+Input
+
+```liquid
+{{ "now" | utc | date: "%c" }}
+```
+
+Output
+
+```text
+Wednesday, 02 August 2017 11:54:48
+```
+
 ### `t`
 
 Localizes a string using the current culture.