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// Copyright © 2020-present, Michael Cummings // // 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. // // MIT License // // Copyright © 2020-present, Michael Cummings <mgcummings@yahoo.com>. // // Permission is hereby granted, free of charge, to any person obtaining a copy // of this software and associated documentation files (the "Software"), to deal // in the Software without restriction, including without limitation the rights // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell // copies of the Software, and to permit persons to whom the Software is // furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be included in // all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE // SOFTWARE. #[cfg(feature = "wasm-bindgen")] pub use crate::uuid4gen::*; pub use crate::{error::*, uuid4::*}; use std::collections::HashMap; mod error; #[cfg(test)] mod tests; mod uuid4; #[cfg(feature = "wasm-bindgen")] mod uuid4gen; /// Core trait for the library. pub trait Uuid { /// Provides direct access to the internal value of the uuid. /// /// This allows the other trait methods to access the value without knowing /// how or where it is actual kept. fn uuid0(&self) -> u128; /// Provides direct access to set the internal value of the uuid. /// /// This allows the other trait methods to write the value without knowing /// how or where it is actual kept. fn set_uuid0(&mut self, v: u128); /// Generate a custom base 64 encoded UUID v4 (random). fn as_base64(&self) -> String { let mut map = HashMap::with_capacity(64); for (k, v) in Self::BASE64.iter() { map.insert(*k, *v); } let mut binary = String::from("0000"); binary += &*format!("{:0>128b}", self.uuid0()); let mut result = String::new(); for _ in 0..22 { let (bits, remaining) = binary.split_at(6); result.push( *map.get(bits) .expect("Received unknown bit pattern. Check BASE64"), ); binary = remaining.to_string(); } result } /// Generate a hexadecimal encoded UUID v4 (random). fn as_hex_string(&self) -> String { format!("{:0>32x}", self.uuid0()) } /// Generate a standard UUID v4 (random). /// /// The original PHP code for the function was found in answer at /// https://stackoverflow.com/questions/2040240/php-function-to-generate-v4-uuid /// by Arie which is based on a function found at /// http://php.net/manual/en/function.com-create-guid.php /// by pavel.volyntsev(at)gmail. /// /// There have been many other changes since the above code especially with /// translation to Rust. fn as_uuid(&self) -> String { let mut hex = format!("{:0>32x}", self.uuid0()); let mut result = String::new(); let chunks = [8usize, 4, 4, 4, 12]; for idx in chunks.iter() { let (chunk, remaining) = hex.split_at(*idx); result.push_str(chunk); result.push('-'); hex = remaining.to_string(); } result.truncate(36); result } /// An array use when decoding/encoding base64. const BASE64: [(&'static str, char); 64] = [ ("000000", 'A'), ("000001", 'B'), ("000010", 'C'), ("000011", 'D'), ("000100", 'E'), ("000101", 'F'), ("000110", 'G'), ("000111", 'H'), ("001000", 'I'), ("001001", 'J'), ("001010", 'K'), ("001011", 'L'), ("001100", 'M'), ("001101", 'N'), ("001110", 'O'), ("001111", 'P'), ("010000", 'Q'), ("010001", 'R'), ("010010", 'S'), ("010011", 'T'), ("010100", 'U'), ("010101", 'V'), ("010110", 'W'), ("010111", 'X'), ("011000", 'Y'), ("011001", 'Z'), ("011010", 'a'), ("011011", 'b'), ("011100", 'c'), ("011101", 'd'), ("011110", 'e'), ("011111", 'f'), ("100000", 'g'), ("100001", 'h'), ("100010", 'i'), ("100011", 'j'), ("100100", 'k'), ("100101", 'l'), ("100110", 'm'), ("100111", 'n'), ("101000", 'o'), ("101001", 'p'), ("101010", 'q'), ("101011", 'r'), ("101100", 's'), ("101101", 't'), ("101110", 'u'), ("101111", 'v'), ("110000", 'w'), ("110001", 'x'), ("110010", 'y'), ("110011", 'z'), ("110100", '0'), ("110101", '1'), ("110110", '2'), ("110111", '3'), ("111000", '4'), ("111001", '5'), ("111010", '6'), ("111011", '7'), ("111100", '8'), ("111101", '9'), ("111110", '-'), ("111111", '_'), ]; }