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use super::{Coordinate, Group};
use coordinate::*;
use std::{
collections::hash_map::DefaultHasher,
fs::OpenOptions,
hash::{Hash, Hasher},
io::{self, prelude::*},
};
use tools::seed_rgba;
pub struct CustomConverter<'a> {
pub split: char,
pub node_range: u32,
pub radius: u32,
pub size: u64,
pub lambda_tag: &'a Fn(&str) -> bool,
pub link_groups: bool,
pub ignore_empty_lines: bool,
}
pub fn convert_file(path: &str, lambda: &Fn(&str) -> bool) -> Result<Vec<Group>, io::Error> {
let content = get_content(path)?;
Ok(convert(&content, &lambda))
}
fn get_content(path: &str) -> Result<String, io::Error> {
let mut file = OpenOptions::new().read(true).open(path)?;
let mut contents = String::new();
let _ = file.read_to_string(&mut contents);
Ok(contents)
}
pub fn convert(content: &str, lambda: &Fn(&str) -> bool) -> Vec<Group> {
let cct = CustomConverter::new('\n', 120, 120, &lambda);
convert_inner(&content, &cct)
}
impl<'a> CustomConverter<'a> {
pub fn new(
split: char,
node_range: u32,
radius: u32,
lambda_tag: &'a Fn(&str) -> bool,
) -> CustomConverter {
CustomConverter {
split,
node_range,
radius,
size: 500,
lambda_tag,
ignore_empty_lines: true,
link_groups: true,
}
}
}
pub fn convert_inner(content: &str, cct: &CustomConverter) -> Vec<Group> {
let mut groups: Vec<Group> = Vec::new();
let lines = content.split(cct.split);
let coordinates = Coordinate::new(0, 0);
let mut groups_boolean_array: [bool; 500] = [false; 500];
for line in lines {
if (cct.ignore_empty_lines && line == "") || !(cct.lambda_tag)(line) {
continue;
};
let hashed_line = calculate_hash(&line);
if groups_boolean_array[(hashed_line % cct.size) as usize] {
let index = groups
.iter()
.position(|ref g| g.settings.hash == hashed_line)
.expect("Group located, but no hash matching.");
groups[index].new_node_min_max(index as u32, cct.node_range);
} else {
groups_boolean_array[(hashed_line % cct.size) as usize] = true;
let mut group = Group::new(&line, gen_radius(coordinates, 0, cct.radius));
group.settings.color = seed_rgba(hashed_line);
if cct.link_groups && !groups.is_empty() {
let tmp = &groups[groups.len() - 1];
let n = if tmp.nodes.is_empty() {
&tmp.settings
} else {
&tmp.nodes[tmp.nodes.len() - 1]
};
group.settings.link(n);
}
groups.push(group);
}
}
groups
}
pub fn calculate_hash<T: Hash>(t: &T) -> u64 {
let mut s = DefaultHasher::new();
t.hash(&mut s);
s.finish()
}
#[cfg(test)]
mod tests {
use super::{super::Draw, *};
use std::{
fs::{self, File},
path::Path,
};
fn eval_result(res: Vec<Group>) {
assert_eq!(res.len(), 3);
assert_eq!(res[0].nodes.len(), 1);
assert_eq!(res[1].nodes.len(), 4);
assert_eq!(res[2].nodes.len(), 2);
}
#[test]
fn test_convert_inner() {
let cct = CustomConverter {
split: '-',
node_range: 10,
radius: 50,
size: 50,
lambda_tag: &|_x| true,
ignore_empty_lines: true,
link_groups: true,
};
let content = "a-b-c-a-b-c-b--b-b-c";
let res = convert_inner(content, &cct);
eval_result(res);
}
#[test]
fn test_convert() {
let content = "a\nb\nc\na\nb\nc\nb\nb\nb\nc";
let res = convert(content, &|_x| true);
eval_result(res);
}
#[test]
fn test_convert_file() {
let path = Path::new("test.txt");
let mut file = File::create(&path).unwrap();
let content = "a\nb\nc\na\nb\nc\nb\nb\nb\nc";
let _ = file.write_all(content.as_bytes()).unwrap();
let res = convert_file("test.txt", &|_x| true).unwrap();
eval_result(res);
let _ = fs::remove_file("test.txt").unwrap();
}
#[test]
fn test_link_groups() {
let content = "a\nb\nc\na\nb\nc\nb\nb\nb\nc";
let res = convert(content, &|_x| true);
for (i, g) in res.iter().enumerate().rev() {
if i == 0 {
break;
}
let left = g.get_links()[0].t;
assert_ne!(
left,
0,
"Result did not link forward. ({:?})",
g.get_links()
);
}
}
}