github.com/argoproj/argo-events@v1.9.1/common/recurrence.go (about)

     1  /*
     2  Copyright 2018 BlackRock, Inc.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8  	http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package common
    18  
    19  import (
    20  	"strings"
    21  	"time"
    22  )
    23  
    24  const (
    25  	exceptionDateTimePrefix = "EXDATE:"
    26  	dateTimeFormat          = "20060102T150405Z"
    27  )
    28  
    29  // ParseExclusionDates parses the exclusion dates from the vals string according to RFC 5545
    30  func ParseExclusionDates(vals []string) ([]time.Time, error) {
    31  	exclusionDates := make([]time.Time, 0)
    32  	for _, val := range vals {
    33  		if strings.HasPrefix(val, exceptionDateTimePrefix) {
    34  			dates, err := parseDateTimes(strings.TrimPrefix(val, exceptionDateTimePrefix))
    35  			if err != nil {
    36  				return nil, err
    37  			}
    38  			exclusionDates = append(exclusionDates, dates...)
    39  		}
    40  	}
    41  	return exclusionDates, nil
    42  }
    43  
    44  func parseDateTimes(s string) ([]time.Time, error) {
    45  	res := make([]time.Time, 0)
    46  	stringDates := strings.Split(s, ",")
    47  	for _, stringDate := range stringDates {
    48  		t, err := time.Parse(dateTimeFormat, stringDate)
    49  		if err != nil {
    50  			return nil, err
    51  		}
    52  		res = append(res, t)
    53  	}
    54  	return res, nil
    55  }