magellan 4.2.1

Deterministic codebase mapping tool for local development
Documentation
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//! Query command implementation
//!
//! Lists symbols in a file, optionally filtered by kind.

use anyhow::Result;
use magellan::common::{
    detect_language_from_path, format_symbol_kind, parse_symbol_kind, resolve_path,
};
use magellan::output::rich::{SpanChecksums, SpanContext};
use magellan::output::{
    output_json, CalleeInfo, CallerInfo, JsonResponse, OutputFormat, QueryResponse, Span,
    SymbolMatch,
};
use magellan::{CodeGraph, SymbolFact};
use std::path::PathBuf;

const QUERY_EXPLAIN_TEXT: &str = r#"Query Selector Cheatsheet
--------------------------------
Selectors:
Required selectors:
  --file <path>            Absolute or root-relative path to inspect.

Optional filters:
  --kind <kind>            function|method|struct|trait|enum|mod|type_alias|union|namespace.
  --symbol <name>          Limit output to a specific symbol (case-sensitive).
  --show-extent            With --symbol, print byte + line/column ranges.

Related helpers:
  magellan refs --name <symbol> --path <file>      Show incoming/outgoing references.
  magellan find --name <symbol>                    Locate symbol across files.
  magellan find --list-glob \"test_*\"             Preview glob sets before bulk edits.

Examples:
  magellan query --db mag.db --file src/main.rs --kind function
  magellan query --db mag.db --file src/lib.rs --symbol main --show-extent
  magellan find  --db mag.db --list-glob \"handler_*\""#;

#[allow(
    clippy::too_many_arguments,
    reason = "CLI command surface: each arg maps to a flag"
)]
pub fn run_query(
    db_path: PathBuf,
    file_path: Option<PathBuf>,
    root: Option<PathBuf>,
    kind_str: Option<String>,
    explain: bool,
    symbol: Option<String>,
    show_extent: bool,
    output_format: OutputFormat,
    with_context: bool,
    with_callers: bool,
    with_callees: bool,
    with_semantics: bool,
    with_checksums: bool,
    context_lines: usize,
) -> Result<()> {
    // Build args for execution tracking
    let mut args = vec!["query".to_string()];
    if let Some(ref fp) = file_path {
        args.push("--file".to_string());
        args.push(fp.to_string_lossy().to_string());
    }
    if let Some(ref root_path) = root {
        args.push("--root".to_string());
        args.push(root_path.to_string_lossy().to_string());
    }
    if let Some(ref kind) = kind_str {
        args.push("--kind".to_string());
        args.push(kind.clone());
    }
    if explain {
        args.push("--explain".to_string());
    }
    if let Some(ref sym) = symbol {
        args.push("--symbol".to_string());
        args.push(sym.clone());
    }
    if show_extent {
        args.push("--show-extent".to_string());
    }

    let mut graph = CodeGraph::open(&db_path)?;
    let exec_id = magellan::output::generate_execution_id();
    let root_str = root.as_ref().map(|p| p.to_string_lossy().to_string());
    let db_path_str = db_path.to_string_lossy().to_string();

    graph.execution_log().start_execution(
        &exec_id,
        env!("CARGO_PKG_VERSION"),
        &args,
        root_str.as_deref(),
        &db_path_str,
    )?;

    // Phase: validate_args
    graph
        .telemetry()
        .record_phase_start(&exec_id, "validate_args")?;

    if explain {
        println!("{}", QUERY_EXPLAIN_TEXT);
        let _ = graph
            .execution_log()
            .finish_execution(&exec_id, "success", None, 0, 0, 0);
        return Ok(());
    }

    if show_extent && symbol.is_none() {
        let err_msg = "--show-extent requires --symbol <name>".to_string();
        let _ = graph
            .execution_log()
            .finish_execution(&exec_id, "error", Some(&err_msg), 0, 0, 0);
        anyhow::bail!(err_msg);
    }

    // Parse kind filter if provided
    let kind_filter = match kind_str {
        Some(ref s) => match parse_symbol_kind(s) {
            Some(k) => Some(k),
            None => {
                let err_msg = format!("Unknown symbol kind: '{}'. Valid kinds: function, method, class, interface, enum, module, union, namespace, typealias", s);
                let _ = graph.execution_log().finish_execution(
                    &exec_id,
                    "error",
                    Some(&err_msg),
                    0,
                    0,
                    0,
                );
                anyhow::bail!(err_msg);
            }
        },
        None => None,
    };

    let file_path = match file_path {
        Some(fp) => fp,
        None => {
            let err_msg = "--file is required unless --explain is used".to_string();
            let _ =
                graph
                    .execution_log()
                    .finish_execution(&exec_id, "error", Some(&err_msg), 0, 0, 0);
            anyhow::bail!(err_msg);
        }
    };

    let path_str = resolve_path(&file_path, &root);

    // End validate_args phase, start query phase
    graph
        .telemetry()
        .record_phase_end(&exec_id, "validate_args")?;
    graph.telemetry().record_phase_start(&exec_id, "query")?;

    // Handle JSON output mode - use symbol_nodes_in_file_with_ids for symbol_id propagation
    if output_format == OutputFormat::Json || output_format == OutputFormat::Pretty {
        let mut symbols_with_ids =
            magellan::graph::query::symbol_nodes_in_file_with_ids(&mut graph, &path_str)?;

        // Apply kind filter
        if let Some(ref filter_kind) = kind_filter {
            symbols_with_ids.retain(|(_, fact, _)| fact.kind == *filter_kind);
        }

        // Apply symbol name filter
        if let Some(ref symbol_name) = symbol {
            symbols_with_ids
                .retain(|(_, fact, _)| fact.name.as_deref() == Some(symbol_name.as_str()));
        }

        let symbols_with_ids: Vec<(SymbolFact, Option<String>)> = symbols_with_ids
            .into_iter()
            .map(|(_, fact, symbol_id)| (fact, symbol_id))
            .collect();

        let _ = graph
            .execution_log()
            .finish_execution(&exec_id, "success", None, 0, 0, 0);
        // End query phase, start build_response phase
        graph.telemetry().record_phase_end(&exec_id, "query")?;
        graph
            .telemetry()
            .record_phase_start(&exec_id, "build_response")?;
        return output_json_mode(
            &path_str,
            symbols_with_ids,
            kind_str,
            show_extent,
            &symbol,
            &mut graph,
            &exec_id,
            output_format,
            with_context,
            with_callers,
            with_callees,
            with_semantics,
            with_checksums,
            context_lines,
        );
    }

    // Human mode - use existing flow
    // End query phase for human output
    graph.telemetry().record_phase_end(&exec_id, "query")?;

    let mut symbols = graph.symbols_in_file_with_kind(&path_str, kind_filter)?;

    if let Some(ref symbol_name) = symbol {
        symbols.retain(|s| s.name.as_deref() == Some(symbol_name.as_str()));
    }

    // Human mode (existing behavior)
    println!("{}:", path_str);

    if symbols.is_empty() {
        println!("  (no symbols found)");
        match symbol {
            Some(ref sym) => println!(
                "  Hint: verify the symbol name or run `magellan find --list-glob \"{}\"`.",
                sym
            ),
            None => println!("  Hint: run `magellan query --explain` for selector syntax."),
        }
        let _ = graph
            .execution_log()
            .finish_execution(&exec_id, "success", None, 0, 0, 0);
        return Ok(());
    }

    for symbol in &symbols {
        let kind_str = format_symbol_kind(&symbol.kind);
        let name = symbol.name.as_deref().unwrap_or("(unnamed)");
        println!(
            "  Line {:4}: {:12} {:<} [{}]",
            symbol.start_line, kind_str, name, symbol.kind_normalized
        );

        // Show callers if requested
        if with_callers {
            let symbol_path = symbol.file_path.to_string_lossy().to_string();
            if let Ok(callers) = graph.callers_of_symbol(&symbol_path, name) {
                if !callers.is_empty() {
                    println!("    Called from:");
                    for caller in &callers {
                        println!(
                            "      {} at {}:{}",
                            caller.caller,
                            caller.file_path.display(),
                            caller.start_line
                        );
                    }
                }
            }
        }

        // Show callees if requested
        if with_callees {
            let symbol_path = symbol.file_path.to_string_lossy().to_string();
            if let Ok(callees) = graph.calls_from_symbol(&symbol_path, name) {
                if !callees.is_empty() {
                    println!("    Calls:");
                    for callee in &callees {
                        println!("      {} at {}", callee.callee, callee.file_path.display());
                    }
                }
            }
        }
    }

    if show_extent {
        if let Some(ref symbol_name) = symbol {
            let mut extents = graph.symbol_extents(&path_str, symbol_name)?;
            if extents.is_empty() {
                println!("  (no extent info found for '{}')", symbol_name);
                let _ = graph
                    .execution_log()
                    .finish_execution(&exec_id, "success", None, 0, 0, 0);
                return Ok(());
            }
            println!();
            println!("Symbol Extents for '{}':", symbol_name);
            extents.sort_by(|(_, a), (_, b)| {
                a.start_line
                    .cmp(&b.start_line)
                    .then_with(|| a.start_col.cmp(&b.start_col))
            });
            for (node_id, fact) in extents {
                print_extent_block(node_id, &fact);
            }
        }
    }

    let _ = graph
        .execution_log()
        .finish_execution(&exec_id, "success", None, 0, 0, 0);

    // Record output phase
    graph.telemetry().record_phase_start(&exec_id, "output")?;
    graph.telemetry().record_phase_end(&exec_id, "output")?;

    Ok(())
}

/// Output query results in JSON format
#[allow(
    clippy::too_many_arguments,
    reason = "JSON output needs all query parameters"
)]
fn output_json_mode(
    path_str: &str,
    mut symbols_with_ids: Vec<(SymbolFact, Option<String>)>,
    kind_str: Option<String>,
    _show_extent: bool,
    _symbol: &Option<String>,
    graph: &mut CodeGraph,
    exec_id: &str,
    output_format: OutputFormat,
    with_context: bool,
    with_callers: bool,
    with_callees: bool,
    with_semantics: bool,
    with_checksums: bool,
    context_lines: usize,
) -> Result<()> {
    // Sort deterministically: by file_path, start_line, start_col, name
    symbols_with_ids.sort_by(|(a, _), (b, _)| {
        a.file_path
            .cmp(&b.file_path)
            .then_with(|| a.start_line.cmp(&b.start_line))
            .then_with(|| a.start_col.cmp(&b.start_col))
            .then_with(|| a.name.as_deref().cmp(&b.name.as_deref()))
    });

    // Convert (SymbolFact, Option<symbol_id>) to SymbolMatch with rich span data
    let symbol_matches: Vec<SymbolMatch> = symbols_with_ids
        .into_iter()
        .map(|(s, symbol_id)| {
            let file_path = s.file_path.to_string_lossy().to_string();
            let mut span = Span::new(
                file_path.clone(),
                s.byte_start,
                s.byte_end,
                s.start_line,
                s.start_col,
                s.end_line,
                s.end_col,
            );

            // Add context if requested
            if with_context {
                if let Some(context) =
                    SpanContext::extract(&file_path, s.start_line, s.end_line, context_lines)
                {
                    span = span.with_context(context);
                }
            }

            // Add semantics if requested
            if with_semantics {
                let language = detect_language_from_path(&file_path);
                span = span.with_semantics_from(s.kind_normalized.clone(), language);
            }

            // Add checksums if requested
            if with_checksums {
                let checksums = SpanChecksums::compute(&file_path, s.byte_start, s.byte_end);
                span = span.with_checksums(checksums);
            }

            let symbol_name = s.name.clone().unwrap_or_else(|| "(unnamed)".to_string());

            // Build caller information if requested
            let callers_info = if with_callers {
                if let Ok(call_facts) = graph.callers_of_symbol(&file_path, &symbol_name) {
                    let mut callers: Vec<CallerInfo> = call_facts
                        .into_iter()
                        .map(|call| CallerInfo {
                            name: call.caller,
                            file_path: call.file_path.to_string_lossy().to_string(),
                            line: call.start_line,
                            column: call.start_col,
                        })
                        .collect();
                    // Sort deterministically
                    callers.sort_by(|a, b| {
                        a.file_path
                            .cmp(&b.file_path)
                            .then_with(|| a.line.cmp(&b.line))
                    });
                    Some(callers)
                } else {
                    None
                }
            } else {
                None
            };

            // Build callee information if requested
            let callees_info = if with_callees {
                if let Ok(call_facts) = graph.calls_from_symbol(&file_path, &symbol_name) {
                    let mut callees: Vec<CalleeInfo> = call_facts
                        .into_iter()
                        .map(|call| CalleeInfo {
                            name: call.callee,
                            file_path: call.file_path.to_string_lossy().to_string(),
                        })
                        .collect();
                    // Sort deterministically
                    callees.sort_by(|a, b| {
                        a.file_path
                            .cmp(&b.file_path)
                            .then_with(|| a.name.cmp(&b.name))
                    });
                    Some(callees)
                } else {
                    None
                }
            } else {
                None
            };

            SymbolMatch::new(
                symbol_name,
                s.kind_normalized,
                span,
                None,      // parent not tracked yet
                symbol_id, // stable symbol ID from graph
            )
            .with_callers_and_callees(callers_info, callees_info)
        })
        .collect();

    let response = QueryResponse {
        symbols: symbol_matches,
        file_path: path_str.to_string(),
        kind_filter: kind_str,
    };

    let json_response = JsonResponse::new(response, exec_id);
    output_json(&json_response, output_format)?;

    Ok(())
}

fn print_extent_block(node_id: i64, symbol: &magellan::SymbolFact) {
    let name = symbol.name.as_deref().unwrap_or("(unnamed)");
    println!("  Node ID: {}", node_id);
    println!(
        "    {} [{}] at {}",
        name,
        symbol.kind_normalized,
        symbol.file_path.to_string_lossy()
    );
    println!("    Byte Range: {}..{}", symbol.byte_start, symbol.byte_end);
    println!(
        "    Line Range: {}:{} -> {}:{}",
        symbol.start_line, symbol.start_col, symbol.end_line, symbol.end_col
    );
}