ProductPromotion
Logo

Go.Lang

made by https://0x3d.site

GitHub - olebedev/when: A natural language date/time parser with pluggable rules
A natural language date/time parser with pluggable rules - olebedev/when
Visit Site

GitHub - olebedev/when: A natural language date/time parser with pluggable rules

GitHub - olebedev/when: A natural language date/time parser with pluggable rules

when godoc

when is a natural language date/time parser with pluggable rules and merge strategies

Examples

  • tonight at 11:10 pm
  • at Friday afternoon
  • the deadline is next tuesday 14:00
  • drop me a line next wednesday at 2:25 p.m
  • it could be done at 11 am past tuesday

Check EN rules and tests of them, for more examples.

Needed rule not found? Open an issue with the case and it will be added asap.

How it works

Usually, there are several rules added to the parser's instance for checking. Each rule has its own borders - length and offset in provided string. Meanwhile, each rule yields only the first match over the string. So, the library checks all the rules and extracts a cluster of matched rules which have distance between each other less or equal to options.Distance, which is 5 by default. For example:

on next wednesday at 2:25 p.m.
   └──────┬─────┘    └───┬───┘
       weekday      hour + minute

So, we have a cluster of matched rules - "next wednesday at 2:25 p.m." in the string representation.

After that, each rule is applied to the context. In order of definition or in match order, if options.MatchByOrder is set to true(which it is by default). Each rule could be applied with given merge strategy. By default, it's an Override strategy. The other strategies are not implemented yet in the rules. Pull requests are welcome.

Supported Languages

  • EN - English
  • RU - Russian
  • BR - Brazilian Portuguese
  • ZH - Chinese
  • NL - Dutch

Install

The project follows the official release workflow. It is recommended to refer to this resource for detailed information on the process.

To install the latest version:

$ go get github.com/olebedev/when@latest

Usage

w := when.New(nil)
w.Add(en.All...)
w.Add(common.All...)

text := "drop me a line in next wednesday at 2:25 p.m"
r, err := w.Parse(text, time.Now())
if err != nil {
	// an error has occurred
}
if  r == nil {
 	// no matches found
}

fmt.Println(
	"the time",
	r.Time.String(),
	"mentioned in",
	text[r.Index:r.Index+len(r.Text)],
)

Distance Option

w := when.New(nil)
w.Add(en.All...)
w.Add(common.All...)

text := "February 23, 2019 | 1:46pm"

// With default distance (5):
// February 23, 2019 | 1:46pm
//            └───┬───┘
//           distance: 9 (1:46pm will be ignored)

r, _ := w.Parse(text, time.Now())
fmt.Printf(r.Time.String())
// "2019-02-23 09:21:21.835182427 -0300 -03"
// 2019-02-23 (correct)
//   09:21:21 ("wrong")

// With custom distance (10):
w.SetOptions(&rules.Options{
	Distance:     10,
	MatchByOrder: true})

r, _ = w.Parse(text, time.Now())
fmt.Printf(r.Time.String())
// "2019-02-23 13:46:21.559521554 -0300 -03"
// 2019-02-23 (correct)
//   13:46:21 (correct)

State of the project

The project is in a more-or-less complete state. It's used for one project already. Bugs will be fixed as soon as they will be found.

TODO

  • readme: describe all the existing rules
  • implement missed rules for these examples
  • add cli and simple rest api server(#2)

LICENSE

http://www.apache.org/licenses/LICENSE-2.0

Articles
to learn more about the golang concepts.

Resources
which are currently available to browse on.

mail [email protected] to add your project or resources here 🔥.

FAQ's
to know more about the topic.

mail [email protected] to add your project or resources here 🔥.

Queries
or most google FAQ's about GoLang.

mail [email protected] to add more queries here 🔍.

More Sites
to check out once you're finished browsing here.

0x3d
https://www.0x3d.site/
0x3d is designed for aggregating information.
NodeJS
https://nodejs.0x3d.site/
NodeJS Online Directory
Cross Platform
https://cross-platform.0x3d.site/
Cross Platform Online Directory
Open Source
https://open-source.0x3d.site/
Open Source Online Directory
Analytics
https://analytics.0x3d.site/
Analytics Online Directory
JavaScript
https://javascript.0x3d.site/
JavaScript Online Directory
GoLang
https://golang.0x3d.site/
GoLang Online Directory
Python
https://python.0x3d.site/
Python Online Directory
Swift
https://swift.0x3d.site/
Swift Online Directory
Rust
https://rust.0x3d.site/
Rust Online Directory
Scala
https://scala.0x3d.site/
Scala Online Directory
Ruby
https://ruby.0x3d.site/
Ruby Online Directory
Clojure
https://clojure.0x3d.site/
Clojure Online Directory
Elixir
https://elixir.0x3d.site/
Elixir Online Directory
Elm
https://elm.0x3d.site/
Elm Online Directory
Lua
https://lua.0x3d.site/
Lua Online Directory
C Programming
https://c-programming.0x3d.site/
C Programming Online Directory
C++ Programming
https://cpp-programming.0x3d.site/
C++ Programming Online Directory
R Programming
https://r-programming.0x3d.site/
R Programming Online Directory
Perl
https://perl.0x3d.site/
Perl Online Directory
Java
https://java.0x3d.site/
Java Online Directory
Kotlin
https://kotlin.0x3d.site/
Kotlin Online Directory
PHP
https://php.0x3d.site/
PHP Online Directory
React JS
https://react.0x3d.site/
React JS Online Directory
Angular
https://angular.0x3d.site/
Angular JS Online Directory