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use heck::{
ToKebabCase, ToLowerCamelCase, ToPascalCase, ToShoutyKebabCase, ToShoutySnakeCase, ToSnakeCase,
ToTitleCase, ToTrainCase,
};
use crate::models::{Modifier, Output, WeldToken};
pub fn build_string(parts: Vec<WeldToken>) -> String {
let mut result = String::new();
for part in parts {
let partial = build_from_token(part);
result.push_str(&partial);
}
result.replace("r#", "")
}
fn build_from_token(part: WeldToken) -> String {
match part {
WeldToken::Plain(value) => value.clone(),
WeldToken::ConcatGroup(grouped_parts) => grouped_parts
.iter()
.map(|sub_part| build_from_token(sub_part.clone()))
.collect::<String>(),
WeldToken::ListGroup(grouped_parts) => grouped_parts
.iter()
.map(|sub_part| build_from_token(sub_part.clone()))
.collect::<String>(),
WeldToken::Modify(target, modifiers) => match *target {
WeldToken::Plain(value) => modify_single(value, &modifiers),
WeldToken::ListGroup(items) => {
let value = items
.iter()
.map(|sub_part| build_from_token(sub_part.clone()))
.collect::<Vec<String>>();
modify_list(value, &modifiers)
}
WeldToken::ConcatGroup(grouped_parts) => {
let value = grouped_parts
.iter()
.map(|sub_part| build_from_token(sub_part.clone()))
.collect::<String>();
modify_single(value, &modifiers)
}
WeldToken::Modify(token_part, nested_modifiers) => {
let nested_result = modify_single(build_from_token(*token_part), &nested_modifiers);
modify_single(nested_result, &modifiers)
}
},
}
}
fn modify_single(value: String, modifiers: &Vec<Modifier>) -> String {
let values = vec![value.to_string()];
modify_list(values, modifiers)
}
fn modify_list(mut values: Vec<String>, modifiers: &Vec<Modifier>) -> String {
for modified in modifiers {
let list_mode = values.len() > 1;
for i in 0..values.len() {
match modified {
Modifier::Singular => {
if values[i].ends_with('s') {
values[i].pop();
}
}
Modifier::Plural => {
if !values[i].ends_with('s') {
values[i].push('s');
}
}
Modifier::Lowercase => {
values[i] = values[i].to_lowercase();
}
Modifier::Uppercase => values[i] = values[i].to_uppercase(),
Modifier::PascalCase => values[i] = values[i].to_pascal_case(),
Modifier::LowerCamelCase => values[i] = values[i].to_lower_camel_case(),
Modifier::SnakeCase => values[i] = values[i].to_snake_case(),
Modifier::KebabCase => values[i] = values[i].to_kebab_case(),
Modifier::ShoutySnakeCase => values[i] = values[i].to_shouty_snake_case(),
Modifier::TitleCase => {
values[i] = values[i].to_title_case();
}
Modifier::ShoutyKebabCase => values[i] = values[i].to_shouty_kebab_case(),
Modifier::TrainCase => values[i] = values[i].to_train_case(),
Modifier::Replace(from, to) => values[i] = values[i].replace(from, to),
Modifier::Substr(start, end) => {
let start = start.unwrap_or(0);
let end = end.unwrap_or(values[i].len());
values[i] = values[i][start..end].to_string()
}
Modifier::Reverse => {
if list_mode {
values.reverse();
break;
}
values[i] = values[i].chars().rev().collect::<String>();
}
Modifier::Repeat(times) => {
if list_mode {
values = values
.iter()
.cloned()
.cycle()
.take(values.len() * *times)
.collect();
break;
}
values[i] = values[i].repeat(*times);
}
Modifier::Split(pat) => {
if list_mode {
values = values
.iter()
.flat_map(|val| val.split(pat))
.filter(|val| !val.is_empty())
.map(|val| val.to_owned())
.collect::<Vec<String>>();
break;
}
let value = values[i].clone();
let value = value
.split(pat)
.map(|v| v.to_string())
.collect::<Vec<String>>();
values.remove(i);
if !value.is_empty() {
values.splice(i..i, value);
}
}
Modifier::SplitAt(mid) => {
if list_mode {
values = values
.iter()
.flat_map(|val| {
let len = val.len();
// to avoid out of bounds
let mid = mid.min(&len);
let (a, b) = val.split_at(*mid);
[a, b]
})
.map(|val| val.to_owned())
.filter(|val| !val.is_empty())
.collect::<Vec<String>>();
break;
}
let value = values.remove(i);
let (left, right) = value.split_at(*mid);
values.splice(i..i, vec![left.to_string(), right.to_string()]);
}
Modifier::Join(sep) => {
let result = values.join(sep);
values.clear();
values.push(result);
break;
}
Modifier::PadStart(width, pat) => {
let width: i32 = (*width as i32) - (values[i].len() as i32);
if width > 0 {
// TODO: use (width / pat.len) or (width / pat.len) for the repeat, to avoid large truncates
// this can happen when the user adds a pattern that is long, like `|_|` per instance and max remaning width for padding is 2
// per ex:
//------------------------------------------------01234567890
// oneStr | padstart { '|_|', 8 } should render "|_oneStr" -> remaining padding is 2, as 8 - 6 = 2
// oneStr | padstart { '|_|', 11 } should render "|_||_oneStr" -> remaining padding is 5, as 11 - 6 = 5
let mut val = pat.repeat(width as usize)[0..(width as usize)].to_string();
val.push_str(&values[i]);
values[i] = val;
}
}
Modifier::PadEnd(width, pat) => {
let width: i32 = (*width as i32) - (values[i].len() as i32);
if width > 0 {
// TODO: use (width / pat.len) or (width / pat.len) for the repeat, to avoid large truncates
// this can happen when the user adds a pattern that is long, like `|_|` per instance and max remaning width for padding is 2
// per ex:
//----------------------------------------------01234567890
// oneStr | padend { '|_|', 8 } should render "oneStr|_" -> remaining padding is 2, as 8 - 6 = 2
// oneStr | padend { '|_|', 11 } should render "oneStr|_||_" -> remaining padding is 5, as 11 - 6 = 5
values[i].push_str(&pat.repeat(width as usize)[0..(width as usize)]);
}
}
Modifier::Slice(start, end) => {
if list_mode {
let len = values.len() as i32;
let start = parse_pos(len, start.unwrap_or(0));
let end = parse_pos(len, end.unwrap_or(len));
if start >= end {
values = vec![];
} else {
values = values.get(start..end).unwrap_or_default().to_vec();
}
break;
}
let len = values[i].len() as i32;
let start = parse_pos(len, start.unwrap_or(0));
let end = parse_pos(len, end.unwrap_or(len));
if start >= end {
values[i] = String::new();
continue;
}
values[i] = values[i].get(start..end).unwrap_or_default().to_string();
}
Modifier::Splice(output, start, end, replace_with) => {
if list_mode {
let len = values.len() as i32;
let start = parse_pos(len, start.unwrap_or(0));
let end = parse_pos(len, end.unwrap_or(len));
if start > end {
values = vec![];
} else {
let removed = values.splice(start..end, replace_with.clone()).collect();
if let Output::Removed = output {
values = removed;
}
}
break;
}
let len = values[i].len() as i32;
let start = parse_pos(len, start.unwrap_or(0));
let end = parse_pos(len, end.unwrap_or(len));
let replace_with = replace_with.clone().unwrap_or(String::new());
if start > end {
values[i] = String::new();
continue;
}
let removed = values[i].get(start..end).unwrap_or_default().to_string();
values[i].replace_range(start..end, &replace_with);
if let Output::Removed = output {
values[i] = removed;
}
}
}
}
}
values.join("")
}
// couldnt think of a name...
fn parse_pos(len: i32, val: i32) -> usize {
if val < 0 {
(len + val) as usize
} else {
val.min(len) as usize
}
}