Added datetime helper functions

hope-core/src/main/java/io/appform/hope/core/functions/impl/date/DayOfMonth.java

@@ -0,0 +1,33 @@
+/*
+ * Copyright 2019. Santanu Sinha
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License is
+ * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing permissions and limitations
+ * under the License.
+ */
+
+package io.appform.hope.core.functions.impl.date;
+
+import io.appform.hope.core.functions.FunctionImplementation;
+import io.appform.hope.core.functions.HopeFunction;
+import io.appform.hope.core.values.NumericValue;
+import io.appform.hope.core.visitors.Evaluator;
+
+import java.time.LocalDateTime;
+
+/**
+ * returns the current day of the month as a NumericValue.
+ */
+@FunctionImplementation("datetime.day_of_month")
+public class DayOfMonth extends HopeFunction<NumericValue> {
+    @Override
+    public NumericValue apply(Evaluator.EvaluationContext evaluationContext) {
+        return new NumericValue(LocalDateTime.now().getDayOfMonth());
+    }
+}

hope-core/src/main/java/io/appform/hope/core/functions/impl/date/DayOfWeek.java

@@ -0,0 +1,33 @@
+/*
+ * Copyright 2019. Santanu Sinha
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License is
+ * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing permissions and limitations
+ * under the License.
+ */
+
+package io.appform.hope.core.functions.impl.date;
+
+import io.appform.hope.core.functions.FunctionImplementation;
+import io.appform.hope.core.functions.HopeFunction;
+import io.appform.hope.core.values.NumericValue;
+import io.appform.hope.core.visitors.Evaluator;
+
+import java.time.LocalDateTime;
+
+/**
+ * returns the current day of the week as a NumericValue.
+ */
+@FunctionImplementation("datetime.day_of_week")
+public class DayOfWeek extends HopeFunction<NumericValue> {
+    @Override
+    public NumericValue apply(Evaluator.EvaluationContext evaluationContext) {
+        return new NumericValue(LocalDateTime.now().getDayOfWeek().getValue());
+    }
+}

hope-core/src/main/java/io/appform/hope/core/functions/impl/date/DayOfYear.java

@@ -0,0 +1,33 @@
+/*
+ * Copyright 2019. Santanu Sinha
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License is
+ * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing permissions and limitations
+ * under the License.
+ */
+
+package io.appform.hope.core.functions.impl.date;
+
+import io.appform.hope.core.functions.FunctionImplementation;
+import io.appform.hope.core.functions.HopeFunction;
+import io.appform.hope.core.values.NumericValue;
+import io.appform.hope.core.visitors.Evaluator;
+
+import java.time.LocalDateTime;
+
+/**
+ * returns the current day of the year as a NumericValue.
+ */
+@FunctionImplementation("datetime.day_of_year")
+public class DayOfYear extends HopeFunction<NumericValue> {
+    @Override
+    public NumericValue apply(Evaluator.EvaluationContext evaluationContext) {
+        return new NumericValue(LocalDateTime.now().getDayOfYear());
+    }
+}

hope-core/src/main/java/io/appform/hope/core/functions/impl/date/HourOfDay.java

@@ -0,0 +1,33 @@
+/*
+ * Copyright 2019. Santanu Sinha
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License is
+ * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing permissions and limitations
+ * under the License.
+ */
+
+package io.appform.hope.core.functions.impl.date;
+
+import io.appform.hope.core.functions.FunctionImplementation;
+import io.appform.hope.core.functions.HopeFunction;
+import io.appform.hope.core.values.NumericValue;
+import io.appform.hope.core.visitors.Evaluator;
+
+import java.time.LocalDateTime;
+
+/**
+ * Returns the current hour of the day as a NumericValue.
+ */
+@FunctionImplementation("datetime.hour_of_day")
+public class HourOfDay extends HopeFunction<NumericValue> {
+    @Override
+    public NumericValue apply(Evaluator.EvaluationContext evaluationContext) {
+        return new NumericValue(LocalDateTime.now().getHour());
+    }
+}

hope-core/src/main/java/io/appform/hope/core/functions/impl/date/MinuteOfHour.java

@@ -0,0 +1,33 @@
+/*
+ * Copyright 2019. Santanu Sinha
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License is
+ * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing permissions and limitations
+ * under the License.
+ */
+
+package io.appform.hope.core.functions.impl.date;
+
+import io.appform.hope.core.functions.FunctionImplementation;
+import io.appform.hope.core.functions.HopeFunction;
+import io.appform.hope.core.values.NumericValue;
+import io.appform.hope.core.visitors.Evaluator;
+
+import java.time.LocalDateTime;
+
+/**
+ * Returns the current minute of the hour as a NumericValue.
+ */
+@FunctionImplementation("datetime.minute_of_hour")
+public class MinuteOfHour extends HopeFunction<NumericValue> {
+    @Override
+    public NumericValue apply(Evaluator.EvaluationContext evaluationContext) {
+        return new NumericValue(LocalDateTime.now().getMinute());
+    }
+}

hope-core/src/main/java/io/appform/hope/core/functions/impl/date/MonthOfYear.java

@@ -0,0 +1,35 @@
+/*
+ * Copyright 2019. Santanu Sinha
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License is
+ * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing permissions and limitations
+ * under the License.
+ */
+
+package io.appform.hope.core.functions.impl.date;
+
+import io.appform.hope.core.functions.FunctionImplementation;
+import io.appform.hope.core.functions.HopeFunction;
+import io.appform.hope.core.values.NumericValue;
+import io.appform.hope.core.visitors.Evaluator;
+
+import java.time.LocalDateTime;
+import java.time.temporal.WeekFields;
+import java.util.Locale;
+
+/**
+ * returns the current month of the year as a NumericValue.
+ */
+@FunctionImplementation("datetime.month_of_year")
+public class MonthOfYear extends HopeFunction<NumericValue> {
+    @Override
+    public NumericValue apply(Evaluator.EvaluationContext evaluationContext) {
+        return new NumericValue(LocalDateTime.now().getMonth().getValue());
+    }
+}

hope-core/src/main/java/io/appform/hope/core/functions/impl/date/Now.java

@@ -0,0 +1,31 @@
+/*
+ * Copyright 2019. Santanu Sinha
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License is
+ * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing permissions and limitations
+ * under the License.
+ */
+
+package io.appform.hope.core.functions.impl.date;
+
+import io.appform.hope.core.functions.FunctionImplementation;
+import io.appform.hope.core.functions.HopeFunction;
+import io.appform.hope.core.values.NumericValue;
+import io.appform.hope.core.visitors.Evaluator;
+
+/**
+ * Returns current UNIX epoch time {@link NumericValue} in milliseconds.
+ */
+@FunctionImplementation("datetime.now")
+public class Now extends HopeFunction<NumericValue> {
+    @Override
+    public NumericValue apply(Evaluator.EvaluationContext evaluationContext) {
+        return new NumericValue(System.currentTimeMillis());
+    }
+}

hope-core/src/main/java/io/appform/hope/core/functions/impl/date/SecondOfMinute.java

@@ -0,0 +1,33 @@
+/*
+ * Copyright 2019. Santanu Sinha
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License is
+ * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing permissions and limitations
+ * under the License.
+ */
+
+package io.appform.hope.core.functions.impl.date;
+
+import io.appform.hope.core.functions.FunctionImplementation;
+import io.appform.hope.core.functions.HopeFunction;
+import io.appform.hope.core.values.NumericValue;
+import io.appform.hope.core.visitors.Evaluator;
+
+import java.time.LocalDateTime;
+
+/**
+ * Returns the current second of the minute as a NumericValue.
+ */
+@FunctionImplementation("datetime.second_of_minute")
+public class SecondOfMinute extends HopeFunction<NumericValue> {
+    @Override
+    public NumericValue apply(Evaluator.EvaluationContext evaluationContext) {
+        return new NumericValue(LocalDateTime.now().getSecond());
+    }
+}

hope-core/src/main/java/io/appform/hope/core/functions/impl/date/WeekOfMonth.java

@@ -0,0 +1,35 @@
+/*
+ * Copyright 2019. Santanu Sinha
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License is
+ * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing permissions and limitations
+ * under the License.
+ */
+
+package io.appform.hope.core.functions.impl.date;
+
+import io.appform.hope.core.functions.FunctionImplementation;
+import io.appform.hope.core.functions.HopeFunction;
+import io.appform.hope.core.values.NumericValue;
+import io.appform.hope.core.visitors.Evaluator;
+
+import java.time.LocalDateTime;
+import java.time.temporal.WeekFields;
+import java.util.Locale;
+
+/**
+ * returns the current week of the month as a NumericValue.
+ */
+@FunctionImplementation("datetime.week_of_month")
+public class WeekOfMonth extends HopeFunction<NumericValue> {
+    @Override
+    public NumericValue apply(Evaluator.EvaluationContext evaluationContext) {
+        return new NumericValue(LocalDateTime.now().get(WeekFields.of(Locale.getDefault()).weekOfMonth()));
+    }
+}

hope-core/src/main/java/io/appform/hope/core/functions/impl/date/WeekOfYear.java

@@ -0,0 +1,35 @@
+/*
+ * Copyright 2019. Santanu Sinha
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License is
+ * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing permissions and limitations
+ * under the License.
+ */
+
+package io.appform.hope.core.functions.impl.date;
+
+import io.appform.hope.core.functions.FunctionImplementation;
+import io.appform.hope.core.functions.HopeFunction;
+import io.appform.hope.core.values.NumericValue;
+import io.appform.hope.core.visitors.Evaluator;
+
+import java.time.LocalDateTime;
+import java.time.temporal.WeekFields;
+import java.util.Locale;
+
+/**
+ * returns the current week of the year as a NumericValue.
+ */
+@FunctionImplementation("datetime.week_of_year")
+public class WeekOfYear extends HopeFunction<NumericValue> {
+    @Override
+    public NumericValue apply(Evaluator.EvaluationContext evaluationContext) {
+        return new NumericValue(LocalDateTime.now().get(WeekFields.of(Locale.getDefault()).weekOfYear()));
+    }
+}

hope-core/src/main/java/io/appform/hope/core/functions/impl/date/Year.java

@@ -0,0 +1,33 @@
+/*
+ * Copyright 2019. Santanu Sinha
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License is
+ * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing permissions and limitations
+ * under the License.
+ */
+
+package io.appform.hope.core.functions.impl.date;
+
+import io.appform.hope.core.functions.FunctionImplementation;
+import io.appform.hope.core.functions.HopeFunction;
+import io.appform.hope.core.values.NumericValue;
+import io.appform.hope.core.visitors.Evaluator;
+
+import java.time.LocalDateTime;
+
+/**
+ * returns the current year as a NumericValue.
+ */
+@FunctionImplementation("datetime.year")
+public class Year extends HopeFunction<NumericValue> {
+    @Override
+    public NumericValue apply(Evaluator.EvaluationContext evaluationContext) {
+        return new NumericValue(LocalDateTime.now().getYear());
+    }
+}