Dart library for parsing relative date and time.

Related tags

Templates relative-time relative-date
Overview

Dateparser

Dart library for parsing relative date and time.

Examples

  • just now
  • a moment ago
  • tomorrow
  • today
  • yesterday
  • 10 days remaining
  • 2 hours ago
  • 2 months ago
  • 3 hours, 1 minute, and 2 seconds ago
  • in 3 minutes

License

Copyright 2022 Mohamed Haisham

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.
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Comments
  • Additional natural forms to consider

    Additional natural forms to consider

    This is a well-needed client-side alternative to something like https://github.com/tj/go-naturaldate -- nicely done and thank you!

    Here are a few additional forms to consider:

    • last [week|month|quarter|year] / next [week|month|quarter|year]
    • enhancing timeframes to have shorthand forms (e.g., "d" for day, "w" for week, "m" for month, "h" for hour, "min" for minute, "s" and "sec" for second, etc.)
    • enhance direction to support "from now" to indicate in the future
    • if possible make the comma in the duration_chain optional (e.g., support things like 2 hours 25 seconds ago instead of hours, 25 seconds ago)
    • enhancing duration_chain to support an alternate form where a time is specified instead of an additional duration, e.g., 7 days ago at 12:35pm or tomorrow at 7:05:35

    Also, consider enhancing the grammar expression to support adding or subtracting another relative period, e.g., something like:

    expression => relative (("+"|"-") duration_chain)?

    This would enable expressions like:

    • now-4d
    • 7 days ago + 12 hours, 25 minutes
    enhancement 
    opened by klondikedragon 1
  • Enhance the grammar by expanding support

    Enhance the grammar by expanding support

    This provides a couple of notable changes to the grammar.

    • [x] Add shorthand 'd' for day and 'w' for week.
    • [x] The comma used between duration chains is now optional.
    • [x] Parse just a duration from string (without converting to datetime).
    • [x] Adds support for adding and subtracting duration from datetime.
    • [x] Adds support for duration "from" datetime. Note that datetime parsing (such as 00:00) is still missing.
    opened by m-haisham 0
  • Add support for precise datetime parsing

    Add support for precise datetime parsing

    The parse currently only understands relative datetimes. The previous update (#5) added support for adding and subtracting duration from DateTime using + and '-' respectively. This currently lacks support for parsing precise DateTime strings such as 18:20:30.

    This should add support for parsing the following strings.

    • 12:00
    • 12:30:00
    • a hour from 00:00
    • 12 minutes 5 seconds + 12:00

    This issue is derived from #4.

    opened by m-haisham 0
  • Implement proper exceptions

    Implement proper exceptions

    The project currently raises raw Exception objects. This is considered bad practice and makes it hard to capture just those raised by the library.

    We should create a base exception that will be used for this library.

    enhancement 
    opened by m-haisham 0
Releases(v0.2.0)

  • v0.2.0(Sep 20, 2022)

    Added

    • Added custom exceptions.
    • Added en language tests.
    • Added addition and subtraction grammar.
    • Added shorthand 'd' for day and 'w' for week.
    • Added support for returning double and Duration from parse.
    • Added tryParse which is a nullable alternative to parse.
    • Adds support for duration "from" datetime
      • Note that raw datetime parsing (such as 00:00) is still missing
    • Added ability to map to comma from data.

    Changed

    • Unrecognized tokens now return [TokenType.CT_ERROR].
    • Terminate on error in compiler.
    • Value no longer relies on subclasses.

    Fixes

    • Fixed rechron_dev not matching with library declaration.
    • Fixed dependency linking from rechron to rechron_dev.
    • Removed aliases from grammar file.
    • Removed unused 'and' token.
    Source code(tar.gz)
    Source code(zip)

  • v0.1.1-dev.1(Aug 21, 2022)

Owner
Mensch272
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Mensch272
GitHub
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