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use super::{destructure_query_filter, QueryTerm, CAST_COLUMN};
pub struct ColumnFilter {
column: String,
query: String,
}
impl From<(&str, &str)> for ColumnFilter {
fn from(tp: (&str, &str)) -> Self {
Self {
column: tp.0.to_string(),
query: tp.1.to_string(),
}
}
}
impl From<(&str, &String)> for ColumnFilter {
fn from(tp: (&str, &String)) -> Self {
Self {
column: tp.0.to_string(),
query: tp.1.to_string(),
}
}
}
impl ColumnFilter {
pub fn sql_fragments(&self, matched_before: bool) -> Vec<String> {
let column = if self.column == CAST_COLUMN {
"`cast`"
} else {
&self.column
};
let mut first = !matched_before;
let terms = destructure_query_filter(&self.query);
let filters: Vec<String> = terms
.iter()
.map(|term| match term {
QueryTerm::Not(term) => {
let and = if first { "" } else { " AND" };
first = false;
format!("\n {} NOT {} LIKE '%{}%'", and, column, term)
}
QueryTerm::And(term) => {
let and = if first { "" } else { " AND" };
first = false;
format!("\n {} {} LIKE '%{}%'", and, column, term)
}
})
.collect();
filters
}
}