sqlitegraph_cli/
dsl.rs

1use sqlitegraph::{
2    backend::BackendDirection,
3    pattern::{PatternLeg, PatternQuery},
4};
5
6/// Simplified DSL result for v0.2.5 (pipeline/subgraph removed)
7#[derive(Debug, Clone)]
8pub enum DslResult {
9    Pattern(PatternQuery),
10    Error(String),
11}
12
13pub fn parse_dsl(input: &str) -> DslResult {
14    let trimmed = input.trim();
15    if trimmed.is_empty() {
16        return DslResult::Error("empty DSL string".into());
17    }
18    if trimmed.starts_with("pattern ") {
19        return parse_pattern_pipeline(trimmed);
20    }
21    if trimmed.contains("->") || trimmed.contains('*') {
22        return DslResult::Pattern(parse_repetitive_pattern(trimmed));
23    }
24    DslResult::Error(format!("unsupported DSL form: {trimmed}"))
25}
26
27fn parse_pattern_pipeline(input: &str) -> DslResult {
28    let rest = input.trim_start_matches("pattern").trim();
29    let mut segments = rest.splitn(2, "filter");
30    let pattern_part = segments.next().unwrap_or("").trim();
31    if pattern_part.is_empty() {
32        return DslResult::Error("missing pattern segment".into());
33    }
34    let _query = parse_repetitive_pattern(pattern_part);
35    // Note: filter parsing removed for v0.2.5 compatibility
36    DslResult::Pattern(_query)
37}
38
39fn parse_repetitive_pattern(segment: &str) -> PatternQuery {
40    let mut legs = Vec::new();
41    for token in segment.split("->") {
42        let trimmed = token.trim();
43        if trimmed.is_empty() {
44            continue;
45        }
46        let (ty, count) = if let Some((name, times)) = trimmed.split_once('*') {
47            let repeats = times.trim().parse::<usize>().unwrap_or(1);
48            (name.trim(), repeats)
49        } else {
50            (trimmed, 1)
51        };
52        for _ in 0..count {
53            legs.push(PatternLeg {
54                direction: BackendDirection::Outgoing,
55                edge_type: Some(ty.to_string()),
56                constraint: None,
57            });
58        }
59    }
60    PatternQuery { root: None, legs }
61}
62
63// parse_hop_command removed - SubgraphRequest not available in v0.2.5
64// TODO: Implement simplified hop command using PatternQuery if needed
sqlitegraph_cli/dsl.rs

sqlitegraph_cli/
dsl.rs
