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mdbook-template
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[TEM #1] - Stop using Ahacorasick and now replace arguments manually

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pull/3/head
sgoudham 3 years ago
parent 9c32fabb50
commit 913d8edd7a
Signed by: hammy
GPG Key ID: 44E818FD5457EEA4
1 changed files with 237 additions and 49 deletions
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286
src/links.rs
Unescape Escape View File

@ -3,8 +3,8 @@ use std::fs;
use std::path::{Path, PathBuf};
use aho_corasick::AhoCorasick;
use anyhow::Context;
use fancy_regex::{CaptureMatches, Captures, Regex};
use anyhow::{Context, Error};
use fancy_regex::{CaptureMatches, Captures, Match, Regex};
use lazy_static::lazy_static;
use mdbook::errors::Result;
@ -48,14 +48,6 @@ lazy_static! {
\{\{\s* # link opening parens and whitespace(s)
\#([\w'<>.:^\-\(\)\*\+\|\\\/\?]+) # arg name
\s* # optional separating whitespace(s)
\}\} # link closing parens
| # or
\{\{\s* # link opening parens and whitespace
\#([\w'<>.:^\-\(\)\*\+\|\\\/\?]+) # arg name
\s+ # separating whitespace(s)
([^}]+) # get default value for argument
\}\} # link closing parens"
)
.unwrap();
@ -67,7 +59,7 @@ pub(crate) struct Link<'a> {
pub(crate) end_index: usize,
pub(crate) link_type: LinkType,
pub(crate) link_text: &'a str,
args: HashMap<String, &'a str>,
args: HashMap<&'a str, &'a str>,
}
impl<'a> Link<'a> {
@ -107,7 +99,7 @@ impl<'a> Link<'a> {
.into_iter()
.map(|arg| {
let mut split_n = arg.splitn(2, '=');
let key = format!("{{{}}}", split_n.next().unwrap().trim());
let key = split_n.next().unwrap().trim();
let value = split_n.next().unwrap();
(key, value)
})
@ -143,21 +135,15 @@ impl<'a> Link<'a> {
LinkType::Template(ref pat) => {
let target = base.as_ref().join(pat);
fs::read_to_string(&target)
.with_context(|| {
format!(
"Could not read template file {} ({})",
self.link_text,
target.display(),
)
})
.map(|hay| {
let pair = &self.args;
let ac = AhoCorasick::new_auto_configured(
pair.keys().collect::<Vec<_>>().as_slice(),
);
ac.replace_all(hay.as_str(), pair.values().collect::<Vec<_>>().as_slice())
})
let contents = fs::read_to_string(&target).with_context(|| {
format!(
"Could not read template file {} ({})",
self.link_text,
target.display(),
)
})?;
Ok(Args::replace(contents.as_str(), &self.args))
}
}
}
@ -206,13 +192,13 @@ pub(crate) fn extract_template_links(contents: &str) -> LinkIter<'_> {
struct TemplateArgsIter<'a>(CaptureMatches<'a, 'a>);
impl<'a> Iterator for TemplateArgsIter<'a> {
type Item = (String, &'a str);
type Item = (&'a str, &'a str);
fn next(&mut self) -> Option<Self::Item> {
for mat in &mut self.0 {
let mut split_capt = mat.unwrap().get(0).unwrap().as_str().splitn(2, '=');
let key = format!("{{{}}}", split_capt.next().unwrap().trim());
let value = split_capt.next().unwrap();
for cap in &mut self.0 {
let mut split_args = cap.unwrap().get(0).unwrap().as_str().splitn(2, '=');
let key = split_args.next().unwrap().trim();
let value = split_args.next().unwrap();
return Some((key, value));
}
None
@ -223,12 +209,106 @@ fn extract_template_args(contents: &str) -> TemplateArgsIter<'_> {
TemplateArgsIter(TEMPLATE_ARGS.captures_iter(contents))
}
#[derive(PartialEq, Debug, Clone)]
struct Args<'a> {
start_index: usize,
end_index: usize,
args_type: ArgsType<'a>,
args_text: &'a str,
}
impl<'a> Args<'a> {
fn replace(contents: &str, all_args: &HashMap<&str, &str>) -> String {
// Must keep track of indices as they will not correspond after string substitution
let mut previous_end_index = 0;
let mut replaced = String::with_capacity(contents.len());
for captured_arg in extract_args(contents) {
replaced.push_str(&contents[previous_end_index..captured_arg.start_index]);
match captured_arg.args_type {
ArgsType::Escaped => replaced.push_str(&captured_arg.args_text[1..]),
ArgsType::Plain(argument) => match all_args.get(argument) {
None => {}
Some(value) => replaced.push_str(value),
},
ArgsType::Default(argument, default_value) => {
// [TEM #2]
// check if captured_arg exists within hashmap
// if so, replace arg with corresponding value and push to replaced string
// if not, replace arg with default value and push to replaced string
}
}
previous_end_index = captured_arg.end_index;
}
replaced.push_str(&contents[previous_end_index..]);
replaced
}
fn from_capture(cap: Captures<'a>) -> Option<Args<'a>> {
let arg_type = match (cap.get(0), cap.get(1), cap.get(2)) {
(_, Some(argument), None) => {
println!("Argument -> {:?}", argument);
Some(ArgsType::Plain(argument.as_str()))
}
(_, Some(argument), Some(default_value)) => {
println!("Argument -> {:?}", argument);
println!("Default Value -> {:?}", default_value);
Some(ArgsType::Default(argument.as_str(), default_value.as_str()))
}
(Some(mat), _, _) if mat.as_str().starts_with(ESCAPE_CHAR) => {
println!("Escaped -> {}", mat.as_str());
Some(ArgsType::Escaped)
}
_ => None,
};
arg_type.and_then(|arg_type| {
cap.get(0).map(|capt| Args {
start_index: capt.start(),
end_index: capt.end(),
args_type: arg_type,
args_text: capt.as_str(),
})
})
}
}
#[derive(PartialEq, Debug, Clone)]
enum ArgsType<'a> {
Escaped,
Plain(&'a str),
Default(&'a str, &'a str),
}
struct ArgsIter<'a>(CaptureMatches<'a, 'a>);
impl<'a> Iterator for ArgsIter<'a> {
type Item = Args<'a>;
fn next(&mut self) -> Option<Self::Item> {
for cap in &mut self.0 {
if let Some(inc) = Args::from_capture(cap.unwrap()) {
return Some(inc);
}
}
None
}
}
fn extract_args(contents: &str) -> ArgsIter<'_> {
ArgsIter(ARGS.captures_iter(contents))
}
#[cfg(test)]
mod link_tests {
use std::any::Any;
use std::collections::HashMap;
use std::path::PathBuf;
use crate::links::{extract_template_links, Link, LinkType};
use crate::links::{extract_args, extract_template_links, Args, ArgsType, Link, LinkType};
use crate::replace_template;
#[test]
@ -296,7 +376,7 @@ mod link_tests {
end_index: 79,
link_type: LinkType::Template(PathBuf::from("test.rs")),
link_text: "{{#template test.rs lang=rust}}",
args: HashMap::from([("{lang}".to_string(), "rust")])
args: HashMap::from([("lang", "rust")])
},]
);
}
@ -314,10 +394,7 @@ mod link_tests {
end_index: 63,
link_type: LinkType::Template(PathBuf::from("test.rs")),
link_text: "{{#template test.rs lang=rust math=2+2=4}}",
args: HashMap::from([
("{lang}".to_string(), "rust"),
("{math}".to_string(), "2+2=4")
]),
args: HashMap::from([("lang", "rust"), ("math", "2+2=4")]),
},]
);
}
@ -335,10 +412,7 @@ mod link_tests {
end_index: 77,
link_type: LinkType::Template(PathBuf::from("test.rs")),
link_text: "{{#template test.rs lang=rust authors=Goudham & Hazel}}",
args: HashMap::from([
("{lang}".to_string(), "rust"),
("{authors}".to_string(), "Goudham & Hazel")
]),
args: HashMap::from([("lang", "rust"), ("authors", "Goudham & Hazel")]),
},]
);
}
@ -356,10 +430,7 @@ mod link_tests {
end_index: 87,
link_type: LinkType::Template(PathBuf::from("test.rs")),
link_text: "{{#template test.rs lang=rust authors=Goudham & Hazel}}",
args: HashMap::from([
("{lang}".to_string(), "rust"),
("{authors}".to_string(), "Goudham & Hazel")
]),
args: HashMap::from([("lang", "rust"), ("authors", "Goudham & Hazel")]),
},]
);
}
@ -377,7 +448,7 @@ mod link_tests {
end_index: 70,
link_type: LinkType::Template(PathBuf::from("foo-bar\\-baz/_c++.'.rs")),
link_text: "{{#template foo-bar\\-baz/_c++.'.rs path=images}}",
args: HashMap::from([("{path}".to_string(), "images")]),
args: HashMap::from([("path", "images")]),
},]
);
}
@ -400,7 +471,7 @@ mod link_tests {
end_index: 122,
link_type: LinkType::Template(PathBuf::from("test.rs")),
link_text: "{{#template\n test.rs\n lang=rust\n authors=Goudham & Hazel\n year=2022\n }}",
args: HashMap::from([("{lang}".to_string(), "rust"), ("{authors}".to_string(), "Goudham & Hazel"), ("{year}".to_string(), "2022")]),
args: HashMap::from([("lang", "rust"), ("authors", "Goudham & Hazel"), ("year", "2022")]),
},]
);
}
@ -423,8 +494,125 @@ year=2022
end_index: 78,
link_type: LinkType::Template(PathBuf::from("test.rs")),
link_text: "{{#template\n test.rs\nlang=rust\n authors=Goudham & Hazel\nyear=2022\n}}",
args: HashMap::from([("{lang}".to_string(), "rust"), ("{authors}".to_string(), "Goudham & Hazel"), ("{year}".to_string(), "2022")]),
args: HashMap::from([("lang", "rust"), ("authors", "Goudham & Hazel"), ("year", "2022")]),
},]
);
}
#[test]
fn test_extract_zero_args() {
let s = "This is some text without any template links";
assert_eq!(extract_args(s).collect::<Vec<_>>(), vec![])
}
#[test]
fn test_extract_args_partial_match() {
let s = "Some random text with {{#height...";
assert_eq!(extract_args(s).collect::<Vec<_>>(), vec![]);
let s = "Some random text with {{#image ferris.png...";
assert_eq!(extract_args(s).collect::<Vec<_>>(), vec![]);
let s = "Some random text with {{#width 550...";
assert_eq!(extract_args(s).collect::<Vec<_>>(), vec![]);
let s = "Some random text with \\{{#title...";
assert_eq!(extract_args(s).collect::<Vec<_>>(), vec![]);
}
#[test]
fn test_extract_args_empty() {
let s = "Some random text with {{}} {{#}}...";
assert_eq!(extract_args(s).collect::<Vec<_>>(), vec![]);
}
#[test]
fn test_extract_args_simple() {
let s = "This is some random text with {{#path}} and then some more random text";
let res = extract_args(s).collect::<Vec<_>>();
assert_eq!(
res,
vec![Args {
start_index: 30,
end_index: 39,
args_type: ArgsType::Plain("path"),
args_text: "{{#path}}"
}]
);
}
#[test]
fn test_extract_args_escaped() {
let start = r"
Example Text
\{{#height 200px}} << an escaped argument!
";
let end = r"
Example Text
{{#height 200px}} << an escaped argument!
";
assert_eq!(Args::replace(start, &HashMap::<&str, &str>::new()), end);
}
#[test]
fn test_replace_args_simple() {
let start = r"
Example Text
{{#height}} << an argument!
";
let end = r"
Example Text
200px << an argument!
";
assert_eq!(
Args::replace(start, &HashMap::from([("height", "200px")])),
end
);
}
#[test]
fn test_extract_args_with_spaces() {
let s1 = "This is some random text with {{ #path }}";
let s2 = "This is some random text with {{#path }}";
let s3 = "This is some random text with {{ #path}}";
let res1 = extract_args(s1).collect::<Vec<_>>();
let res2 = extract_args(s2).collect::<Vec<_>>();
let res3 = extract_args(s3).collect::<Vec<_>>();
assert_eq!(
res1,
vec![Args {
start_index: 30,
end_index: 51,
args_type: ArgsType::Plain("path"),
args_text: "{{ #path }}"
}]
);
assert_eq!(
res2,
vec![Args {
start_index: 30,
end_index: 46,
args_type: ArgsType::Plain("path"),
args_text: "{{#path }}"
}]
);
assert_eq!(
res3,
vec![Args {
start_index: 30,
end_index: 44,
args_type: ArgsType::Plain("path"),
args_text: "{{ #path}}"
}]
);
}
// #[test]
fn test_extract_args_with_default_value() {}
// #[test]
fn test_extract_args_with_default_value_and_spaces() {}
}
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