├── .gitignore ├── README.md ├── .github └── workflows │ └── ci.yml ├── Cargo.toml ├── LICENSE-MIT ├── LICENSE-APACHE └── src └── lib.rs /.gitignore: -------------------------------------------------------------------------------- 1 | /target 2 | Cargo.lock 3 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Diligent Date Parser 2 | 3 | ![](https://github.com/rust-syndication/diligent-date-parser/workflows/CI/badge.svg) 4 | [![Crates.io Status](https://img.shields.io/crates/v/diligent-date-parser.svg)](https://crates.io/crates/diligent-date-parser) 5 | 6 | This is a Rust library to parse dates in unknown format. 7 | It diligently tries to apply known patterns and returns 8 | best found match. 9 | -------------------------------------------------------------------------------- /.github/workflows/ci.yml: -------------------------------------------------------------------------------- 1 | name: CI 2 | 3 | on: [push, pull_request] 4 | 5 | jobs: 6 | build: 7 | runs-on: ${{ matrix.os }} 8 | 9 | strategy: 10 | fail-fast: false 11 | matrix: 12 | os: [ubuntu-latest, macOS-latest, windows-latest] 13 | 14 | steps: 15 | - uses: actions/checkout@v3 16 | 17 | - uses: dtolnay/rust-toolchain@stable 18 | 19 | - name: build 20 | run: cargo build --verbose 21 | 22 | - name: test 23 | run: cargo test --no-fail-fast --verbose --all -- --nocapture 24 | env: 25 | RUST_BACKTRACE: 1 26 | -------------------------------------------------------------------------------- /Cargo.toml: -------------------------------------------------------------------------------- 1 | [package] 2 | name = "diligent-date-parser" 3 | description = "Library for parsing datetime in unknown format" 4 | version = "0.1.5" 5 | authors = ["Andrey Kutejko "] 6 | edition = "2021" 7 | license = "MIT/Apache-2.0" 8 | readme = "README.md" 9 | keywords = ["date", "datetime", "parser", "parsing"] 10 | homepage = "https://github.com/rust-syndication/diligent-date-parser" 11 | repository = "https://github.com/rust-syndication/diligent-date-parser" 12 | documentation = "https://docs.rs/diligent-date-parser/" 13 | 14 | [dependencies] 15 | chrono = { version = "0.4.27", default-features = false } 16 | -------------------------------------------------------------------------------- /LICENSE-MIT: -------------------------------------------------------------------------------- 1 | MIT License 2 | 3 | Copyright © 2017 The rust-syndication Developers 4 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy 6 | of this software and associated documentation files (the "Software"), to deal 7 | in the Software without restriction, including without limitation the rights 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 | copies of the Software, and to permit persons to whom the Software is 10 | furnished to do so, subject to the following conditions: 11 | 12 | The above copyright notice and this permission notice shall be included in all 13 | copies or substantial portions of the Software. 14 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 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This is a library to parse dates in unknown format. 2 | //! It diligently tries to apply known patterns and returns 3 | //! best found match. 4 | //! 5 | //! # Examples 6 | //! 7 | //! ```rust 8 | //! use diligent_date_parser::parse_date; 9 | //! use diligent_date_parser::chrono::prelude::*; 10 | //! use diligent_date_parser::chrono::offset::FixedOffset; 11 | //! 12 | //! assert_eq!( 13 | //! parse_date("Mon, 2 Jan 2006 15:04:05 MST"), 14 | //! Some(FixedOffset::west(7 * 3600).ymd(2006, 1, 2).and_hms(15, 4, 5)), 15 | //! ); 16 | //! assert_eq!( 17 | //! parse_date("Apr 21 2016"), 18 | //! Some(Utc.ymd(2016, 4, 21).and_hms(0, 0, 0).into()), 19 | //! ); 20 | //! assert_eq!( 21 | //! parse_date("Sun Dec 24 13:19:25 +0200 2017"), 22 | //! Some(Utc.ymd(2017, 12, 24).and_hms(11, 19, 25).into()), 23 | //! ); 24 | //! assert_eq!( 25 | //! parse_date("Yesterday"), 26 | //! None, 27 | //! ); 28 | //! ``` 29 | 30 | pub use chrono; 31 | use chrono::prelude::*; 32 | pub use chrono::{offset::FixedOffset, DateTime}; 33 | use std::convert::AsRef; 34 | 35 | fn cut(string: &str, len: usize) -> Option<&str> { 36 | if string.len() >= len && string.is_char_boundary(len) { 37 | Some(&string[..len]) 38 | } else { 39 | None 40 | } 41 | } 42 | 43 | fn suffix(string: &str, suffix: &'static str) -> String { 44 | format!("{}{}", string, suffix) 45 | } 46 | 47 | fn rfc3339>(string: T) -> Option> { 48 | DateTime::parse_from_rfc3339(string.as_ref()).ok() 49 | } 50 | 51 | fn rfc2822>(string: T) -> Option> { 52 | DateTime::parse_from_rfc2822(string.as_ref()).ok() 53 | } 54 | 55 | fn utc_datetime(string: &str, format: &str) -> Option> { 56 | NaiveDateTime::parse_from_str(string, format) 57 | .map(|d| Utc.from_utc_datetime(&d)) 58 | .ok() 59 | .map(|d: DateTime| d.into()) 60 | } 61 | 62 | fn utc_date(string: &str, format: &str) -> Option> { 63 | let date = NaiveDate::parse_from_str(string, format).ok()?; 64 | let time = NaiveTime::from_hms_opt(0, 0, 0)?; 65 | let datetime = NaiveDateTime::new(date, time); 66 | Some(Utc.from_utc_datetime(&datetime).into()) 67 | } 68 | 69 | /// Parses a string using multiple formats 70 | /// 71 | /// # Example 72 | /// 73 | /// ```rust 74 | /// # use diligent_date_parser::parse_date; 75 | /// # use diligent_date_parser::chrono::prelude::*; 76 | /// # use diligent_date_parser::chrono::offset::FixedOffset; 77 | /// let datetime = parse_date("Mon, 2 Jan 2006 15:04:05 MST"); 78 | /// let expected = FixedOffset::west(7 * 3600).ymd(2006, 1, 2).and_hms(15, 4, 5); 79 | /// assert_eq!(datetime, Some(expected)); 80 | /// ``` 81 | pub fn parse_date(string: &str) -> Option> { 82 | let trimmed = string.trim(); 83 | None.or_else(|| rfc3339(trimmed)) 84 | .or_else(|| DateTime::parse_from_str(trimmed, "%Y-%m-%d %H:%M:%S%.3f %z").ok()) 85 | .or_else(|| utc_datetime(trimmed, "%Y-%m-%d %H:%M:%S%.3f")) 86 | .or_else(|| cut(trimmed, 20).and_then(rfc3339)) 87 | .or_else(|| cut(trimmed, 19).map(|s| suffix(s, "Z")).and_then(rfc3339)) 88 | .or_else(|| { 89 | cut(trimmed, 16) 90 | .map(|s| suffix(s, ":00Z")) 91 | .and_then(rfc3339) 92 | }) 93 | .or_else(|| { 94 | cut(trimmed, 13) 95 | .map(|s| suffix(s, ":00:00Z")) 96 | .and_then(rfc3339) 97 | }) 98 | .or_else(|| { 99 | cut(trimmed, 10) 100 | .map(|s| suffix(s, "T00:00:00Z")) 101 | .and_then(rfc3339) 102 | }) 103 | .or_else(|| rfc2822(trimmed)) 104 | .or_else(|| rfc2822(suffix(trimmed, " +0000"))) 105 | .or_else(|| rfc2822(suffix(trimmed, ":00 +0000"))) 106 | .or_else(|| rfc2822(suffix(trimmed, ":00:00 +0000"))) 107 | .or_else(|| rfc2822(suffix(trimmed, " 00:00:00 +0000"))) 108 | .or_else(|| DateTime::parse_from_str(trimmed, "%a %b %d %H:%M:%S %z %Y").ok()) // twitter's format 109 | .or_else(|| utc_date(trimmed, "%b %d %Y")) 110 | .or_else(|| utc_date(trimmed, "%b %e %Y")) 111 | .or_else(|| utc_date(trimmed, "%B %d %Y")) 112 | .or_else(|| utc_date(trimmed, "%B %e %Y")) 113 | .or_else(|| utc_date(trimmed, "%b %d, %Y")) 114 | .or_else(|| utc_date(trimmed, "%b %e, %Y")) 115 | .or_else(|| utc_date(trimmed, "%B %d, %Y")) 116 | .or_else(|| utc_date(trimmed, "%B %e, %Y")) 117 | .or_else(|| utc_date(trimmed, "%m/%d/%Y")) 118 | .or_else(|| utc_date(trimmed, "%d.%m.%Y")) 119 | } 120 | 121 | #[cfg(test)] 122 | mod test { 123 | use super::*; 124 | use chrono::Duration; 125 | 126 | fn utc(year: i32, mon: u32, day: u32, hour: u32, min: u32, sec: u32) -> DateTime { 127 | Utc.with_ymd_and_hms(year, mon, day, hour, min, sec) 128 | .unwrap() 129 | .into() 130 | } 131 | 132 | #[test] 133 | fn test_parse_date() { 134 | assert_eq!( 135 | parse_date("2011-11-17T08:00:00-08:00"), 136 | Some(utc(2011, 11, 17, 16, 0, 0)) 137 | ); 138 | assert_eq!( 139 | parse_date("2011-11-17T08:00:00-08:00"), 140 | Some( 141 | FixedOffset::west_opt(8 * 3600) 142 | .unwrap() 143 | .with_ymd_and_hms(2011, 11, 17, 8, 0, 0) 144 | .unwrap() 145 | ) 146 | ); 147 | assert_eq!( 148 | parse_date("2011-11-23T18:12:20Z"), 149 | Some(utc(2011, 11, 23, 18, 12, 20)) 150 | ); 151 | assert_eq!( 152 | parse_date("2011-12-10T14:32:42+00:00"), 153 | Some(utc(2011, 12, 10, 14, 32, 42)) 154 | ); 155 | assert_eq!( 156 | parse_date("2010-02-17T00:00:00ZT00:00:00-08:00"), 157 | Some(utc(2010, 2, 17, 0, 0, 0)) 158 | ); 159 | assert_eq!( 160 | parse_date("2010-12-21T19:57:37+00:00"), 161 | Some(utc(2010, 12, 21, 19, 57, 37)) 162 | ); 163 | assert_eq!( 164 | parse_date("2012-02-14T17:58:00-08:00"), 165 | Some(utc(2012, 2, 15, 1, 58, 0)) 166 | ); 167 | assert_eq!( 168 | parse_date("2012-02-15T12:24:00+02:00"), 169 | Some(utc(2012, 2, 15, 10, 24, 0)) 170 | ); 171 | assert_eq!( 172 | parse_date("2013-03-20T10:46:37.600732+02:00"), 173 | Some(utc(2013, 3, 20, 8, 46, 37) + Duration::microseconds(600732)) 174 | ); 175 | assert_eq!( 176 | parse_date("2013-03-20T14:00:00.000000+02:00"), 177 | Some(utc(2013, 3, 20, 12, 0, 0)) 178 | ); 179 | assert_eq!( 180 | parse_date("2013-10-21T18:23:10.394069+03:00"), 181 | Some(utc(2013, 10, 21, 15, 23, 10) + Duration::microseconds(394069)) 182 | ); 183 | assert_eq!( 184 | parse_date("2014-01-08T01:18:21"), 185 | Some(utc(2014, 1, 8, 1, 18, 21)) 186 | ); 187 | assert_eq!( 188 | parse_date("2014-01-07T20:45"), 189 | Some(utc(2014, 1, 7, 20, 45, 0)) 190 | ); 191 | assert_eq!(parse_date("2014-01-08T13"), Some(utc(2014, 1, 8, 13, 0, 0))); 192 | assert_eq!(parse_date("2014-01-11"), Some(utc(2014, 1, 11, 0, 0, 0))); 193 | 194 | assert_eq!( 195 | parse_date("2014-01-11 01:18:21 +0000"), 196 | Some(utc(2014, 01, 11, 1, 18, 21)) 197 | ); 198 | assert_eq!( 199 | parse_date("2014-01-11 01:18:21 +0100"), 200 | Some( 201 | FixedOffset::east_opt(3600) 202 | .unwrap() 203 | .with_ymd_and_hms(2014, 01, 11, 1, 18, 21) 204 | .unwrap() 205 | ) 206 | ); 207 | assert_eq!( 208 | parse_date(" 2014-01-11 01:18:21 "), 209 | Some(utc(2014, 01, 11, 1, 18, 21)) 210 | ); 211 | assert_eq!( 212 | parse_date(" 2014-01-11 01:18:21.125 "), 213 | Some(utc(2014, 01, 11, 1, 18, 21) + Duration::milliseconds(125)) 214 | ); 215 | assert_eq!( 216 | parse_date("Fri, 12 Feb 2016 14:08:24 +0000"), 217 | Some(utc(2016, 2, 12, 14, 8, 24)) 218 | ); 219 | assert_eq!( 220 | parse_date("Fri, 13 Aug 2010 00:49:00 +0700"), 221 | Some(utc(2010, 8, 12, 17, 49, 0)) 222 | ); 223 | assert_eq!( 224 | parse_date("Fri, 13 Jul 2012 07:13:31 -0600"), 225 | Some(utc(2012, 7, 13, 13, 13, 31)) 226 | ); 227 | assert_eq!( 228 | parse_date("Fri, 14 Dec 2012 04:00:00 -0800"), 229 | Some(utc(2012, 12, 14, 12, 0, 0)) 230 | ); 231 | assert_eq!( 232 | parse_date("Fri, 14 Jun 2013 05:00:00 -0700"), 233 | Some(utc(2013, 6, 14, 12, 0, 0)) 234 | ); 235 | assert_eq!( 236 | parse_date("Fri, 14 Nov 2014 17:16:12 PST"), 237 | Some(utc(2014, 11, 15, 1, 16, 12)) 238 | ); 239 | assert_eq!( 240 | parse_date("Fri, 14 Oct 2011 04:01:47 +0000"), 241 | Some(utc(2011, 10, 14, 4, 1, 47)) 242 | ); 243 | assert_eq!( 244 | parse_date("Fri, 15 Apr 2016 00:00:00 +0200"), 245 | Some(utc(2016, 4, 14, 22, 0, 0)) 246 | ); 247 | assert_eq!( 248 | parse_date("Fri, 15 Apr 2016 23:02:22 GMT"), 249 | Some(utc(2016, 4, 15, 23, 2, 22)) 250 | ); 251 | assert_eq!( 252 | parse_date("Fri, 15 Mar 2013 07:27:18 +0000"), 253 | Some(utc(2013, 3, 15, 7, 27, 18)) 254 | ); 255 | assert_eq!( 256 | parse_date("Fri, 16 May 2014 02:13:00 PDT"), 257 | Some(utc(2014, 5, 16, 9, 13, 0)) 258 | ); 259 | assert_eq!( 260 | parse_date("Tue, 3 Jul 2012 23:02:36 +0400"), 261 | Some(utc(2012, 7, 3, 19, 2, 36)) 262 | ); 263 | assert_eq!( 264 | parse_date("Tue, 3 Jul 2012 23:02:36 +0400"), 265 | Some(utc(2012, 7, 3, 19, 2, 36)) 266 | ); 267 | assert_eq!( 268 | parse_date("Tue, 3 Jul 2012 23:02:36"), 269 | Some(utc(2012, 7, 3, 23, 2, 36)) 270 | ); 271 | assert_eq!( 272 | parse_date("Tue, 3 Jul 2012 23:02"), 273 | Some(utc(2012, 7, 3, 23, 2, 0)) 274 | ); 275 | assert_eq!( 276 | parse_date("Tue, 3 Jul 2012 23"), 277 | Some(utc(2012, 7, 3, 23, 0, 0)) 278 | ); 279 | assert_eq!( 280 | parse_date("Tue, 3 Jul 2012"), 281 | Some(utc(2012, 7, 3, 0, 0, 0)) 282 | ); 283 | assert_eq!( 284 | parse_date("3 Jul 2012 23:02:36"), 285 | Some(utc(2012, 7, 3, 23, 2, 36)) 286 | ); 287 | 288 | assert_eq!(parse_date("14 Apr 2016"), Some(utc(2016, 4, 14, 0, 0, 0))); 289 | assert_eq!(parse_date("21 Apr 2016"), Some(utc(2016, 4, 21, 0, 0, 0))); 290 | assert_eq!(parse_date("28 Apr 2016"), Some(utc(2016, 4, 28, 0, 0, 0))); 291 | assert_eq!(parse_date(" 7 Apr 2016"), Some(utc(2016, 4, 7, 0, 0, 0))); 292 | 293 | assert_eq!(parse_date("Apr 21 2016"), Some(utc(2016, 4, 21, 0, 0, 0))); 294 | assert_eq!(parse_date(" Apr 1, 2016"), Some(utc(2016, 4, 1, 0, 0, 0))); 295 | assert_eq!( 296 | parse_date(" April 01, 2016"), 297 | Some(utc(2016, 4, 1, 0, 0, 0)) 298 | ); 299 | 300 | // twitter 301 | assert_eq!( 302 | parse_date("Sun Dec 24 13:19:25 +0000 2017"), 303 | Some(utc(2017, 12, 24, 13, 19, 25)) 304 | ); 305 | assert_eq!( 306 | parse_date("Sun Dec 24 13:19:25 -0000 2017"), 307 | Some(utc(2017, 12, 24, 13, 19, 25)) 308 | ); 309 | assert_eq!( 310 | parse_date("Sun Dec 24 13:19:25 +0200 2017"), 311 | Some(utc(2017, 12, 24, 11, 19, 25)) 312 | ); 313 | assert_eq!( 314 | parse_date("Sun Dec 24 13:19:25 -0200 2017"), 315 | Some(utc(2017, 12, 24, 15, 19, 25)) 316 | ); 317 | } 318 | } 319 | --------------------------------------------------------------------------------