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use smol_str::SmolStr;
pub fn object_ref_matches_table(
possible_references: &[Vec<SmolStr>],
targets: &[Vec<SmolStr>],
) -> bool {
// Simple case: If there are no references, assume okay.
if possible_references.is_empty() {
return true;
}
// Helper function to strip quotes from identifiers
let strip_quotes = |s: &str| s.trim_matches('"').to_string();
// Simple case: Reference exactly matches a target.
for pr in possible_references {
for t in targets {
if pr.len() == t.len()
&& pr
.iter()
.zip(t.iter())
.all(|(p, t)| strip_quotes(p.as_str()) == strip_quotes(t.as_str()))
{
return true;
}
}
}
// Handle schema-qualified table references with aliases
for pr in possible_references {
for t in targets {
// If the reference is just the alias (e.g. "user_profiles")
if pr.len() == 1
&& t.len() == 1
&& strip_quotes(pr[0].as_str()) == strip_quotes(t[0].as_str())
{
return true;
}
// If the reference includes schema (e.g. ["public", "user_profiles"])
if pr.len() == 2
&& t.len() == 1
&& strip_quotes(pr[1].as_str()) == strip_quotes(t[0].as_str())
{
return true;
}
}
}
// Tricky case: If one is shorter than the other, check for a suffix match.
for pr in possible_references {
for t in targets {
match pr.len().cmp(&t.len()) {
std::cmp::Ordering::Less => {
let suffix_match = pr
.iter()
.zip(t[t.len() - pr.len()..].iter())
.all(|(p, t)| strip_quotes(p.as_str()) == strip_quotes(t.as_str()));
if suffix_match {
return true;
}
}
std::cmp::Ordering::Greater => {
let suffix_match = t
.iter()
.zip(pr[pr.len() - t.len()..].iter())
.all(|(t, p)| strip_quotes(t.as_str()) == strip_quotes(p.as_str()));
if suffix_match {
return true;
}
}
std::cmp::Ordering::Equal => {}
}
}
}
false
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_object_ref_matches_table() {
let test_cases = vec![
// Empty list of references is always true
(vec![], vec![vec!["abc".into()]], true),
// Simple cases: one reference, one target
(
vec![vec!["agent1".into()]],
vec![vec!["agent1".into()]],
true,
),
(
vec![vec!["agent1".into()]],
vec![vec!["customer".into()]],
false,
),
// Multiple references. If any match, good.
(
vec![vec!["bar".into()], vec!["user_id".into()]],
vec![vec!["bar".into()]],
true,
),
(
vec![vec!["foo".into()], vec!["user_id".into()]],
vec![vec!["bar".into()]],
false,
),
// Multiple targets. If any reference matches, good.
(
vec![vec!["table1".into()]],
vec![
vec!["table1".into()],
vec!["table2".into()],
vec!["table3".into()],
],
true,
),
(
vec![vec!["tbl2".into()]],
vec![vec!["db".into(), "sc".into(), "tbl1".into()]],
false,
),
(
vec![vec!["tbl2".into()]],
vec![vec!["db".into(), "sc".into(), "tbl2".into()]],
true,
),
// Multipart references and targets. Checks for a suffix match.
(
vec![vec!["Arc".into(), "tbl1".into()]],
vec![vec!["db".into(), "sc".into(), "tbl1".into()]],
false,
),
(
vec![vec!["sc".into(), "tbl1".into()]],
vec![vec!["db".into(), "sc".into(), "tbl1".into()]],
true,
),
(
vec![vec!["cb".into(), "sc".into(), "tbl1".into()]],
vec![vec!["db".into(), "sc".into(), "tbl1".into()]],
false,
),
(
vec![vec!["db".into(), "sc".into(), "tbl1".into()]],
vec![vec!["db".into(), "sc".into(), "tbl1".into()]],
true,
),
(
vec![vec!["public".into(), "agent1".into()]],
vec![vec!["agent1".into()]],
true,
),
(
vec![vec!["public".into(), "agent1".into()]],
vec![vec!["public".into()]],
false,
),
];
for (possible_references, targets, expected) in test_cases {
assert_eq!(
object_ref_matches_table(&possible_references, &targets),
expected
);
}
}
}