use reifydb_core::value::column::{Column, columns::Columns, data::ColumnData};
use reifydb_type::{
util::bitvec::BitVec,
value::{constraint::bytes::MaxBytes, container::utf8::Utf8Container, r#type::Type},
};
use crate::function::{Function, FunctionCapability, FunctionContext, FunctionInfo, error::FunctionError};
pub struct TextPadRight {
info: FunctionInfo,
}
impl Default for TextPadRight {
fn default() -> Self {
Self::new()
}
}
impl TextPadRight {
pub fn new() -> Self {
Self {
info: FunctionInfo::new("text::pad_right"),
}
}
}
impl Function for TextPadRight {
fn info(&self) -> &FunctionInfo {
&self.info
}
fn capabilities(&self) -> &[FunctionCapability] {
&[FunctionCapability::Scalar]
}
fn return_type(&self, _input_types: &[Type]) -> Type {
Type::Utf8
}
fn execute(&self, ctx: &FunctionContext, args: &Columns) -> Result<Columns, FunctionError> {
if args.len() != 3 {
return Err(FunctionError::ArityMismatch {
function: ctx.fragment.clone(),
expected: 3,
actual: args.len(),
});
}
let str_col = &args[0];
let len_col = &args[1];
let pad_col = &args[2];
let (str_data, str_bv) = str_col.data().unwrap_option();
let (len_data, len_bv) = len_col.data().unwrap_option();
let (pad_data, pad_bv) = pad_col.data().unwrap_option();
let row_count = str_data.len();
let pad_container = match pad_data {
ColumnData::Utf8 {
container,
..
} => container,
other => {
return Err(FunctionError::InvalidArgumentType {
function: ctx.fragment.clone(),
argument_index: 2,
expected: vec![Type::Utf8],
actual: other.get_type(),
});
}
};
match str_data {
ColumnData::Utf8 {
container: str_container,
..
} => {
let mut result_data = Vec::with_capacity(row_count);
for i in 0..row_count {
if !str_container.is_defined(i) || !pad_container.is_defined(i) {
result_data.push(String::new());
continue;
}
let target_len = match len_data {
ColumnData::Int1(c) => c.get(i).map(|&v| v as i64),
ColumnData::Int2(c) => c.get(i).map(|&v| v as i64),
ColumnData::Int4(c) => c.get(i).map(|&v| v as i64),
ColumnData::Int8(c) => c.get(i).copied(),
ColumnData::Uint1(c) => c.get(i).map(|&v| v as i64),
ColumnData::Uint2(c) => c.get(i).map(|&v| v as i64),
ColumnData::Uint4(c) => c.get(i).map(|&v| v as i64),
_ => {
return Err(FunctionError::InvalidArgumentType {
function: ctx.fragment.clone(),
argument_index: 1,
expected: vec![
Type::Int1,
Type::Int2,
Type::Int4,
Type::Int8,
],
actual: len_data.get_type(),
});
}
};
match target_len {
Some(n) if n >= 0 => {
let s = &str_container[i];
let pad_char = &pad_container[i];
let char_count = s.chars().count();
let target = n as usize;
if char_count >= target {
result_data.push(s.to_string());
} else {
let pad_chars: Vec<char> = pad_char.chars().collect();
if pad_chars.is_empty() {
result_data.push(s.to_string());
} else {
let needed = target - char_count;
let mut padded = String::with_capacity(
s.len() + needed
* pad_chars[0].len_utf8(),
);
padded.push_str(s);
for j in 0..needed {
padded.push(
pad_chars[j % pad_chars.len()]
);
}
result_data.push(padded);
}
}
}
Some(_) => {
result_data.push(String::new());
}
None => {
result_data.push(String::new());
}
}
}
let result_col_data = ColumnData::Utf8 {
container: Utf8Container::new(result_data),
max_bytes: MaxBytes::MAX,
};
let mut combined_bv: Option<BitVec> = None;
for bv in [str_bv, len_bv, pad_bv].into_iter().flatten() {
combined_bv = Some(match combined_bv {
Some(existing) => existing.and(bv),
None => bv.clone(),
});
}
let final_data = match combined_bv {
Some(bv) => ColumnData::Option {
inner: Box::new(result_col_data),
bitvec: bv,
},
None => result_col_data,
};
Ok(Columns::new(vec![Column::new(ctx.fragment.clone(), final_data)]))
}
other => Err(FunctionError::InvalidArgumentType {
function: ctx.fragment.clone(),
argument_index: 0,
expected: vec![Type::Utf8],
actual: other.get_type(),
}),
}
}
}