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<h1><a href="../../../index.html">All files</a> / <a href="index.html">src/artifacts/graph</a> signal_graph_builder.ts</h1>
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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">/**
* Signal Graph Builder - Phase 3 HOP 3.2a
*
* Constructs partial signal graph (definitions + emissions) from AST forest.
*
* Architecture:
* - Aggregates signal definitions across all files (reuses Phase 2 SignalExtractor)
* - Aggregates emission sites from tree-sitter AST (new extractEmissions)
* - Builds bidirectional indices: signal → files, file → signals
* - Generates metadata and statistics for graph consumers
*
* Performance:
* - Target: <500ms for 300 signals across 500 files
* - Parallel processing via ProjectScanner (HOP 3.1)
* - Memory-efficient Map-based indices
*
* @module artifacts/graph
*/
import type { Tree } from 'tree-sitter';
import { SignalExtractor } from '../parsers/signal_extractor.js';
import type { SignalDefinition } from '../parsers/gdscript_parser.js';
import type {
EmissionSite,
ConnectionSite,
PartialGraph,
SignalGraph,
GraphMetadata,
GraphBuilderStats,
} from './types.js';
import type { ASTForest, ASTWithMetadata } from '../scanner/types.js';
/**
* Builds partial signal graphs (definitions + emissions) from AST forests.
*
* HOP 3.2a delivers partial graph construction, HOP 3.2b adds connections.
*
* @example
* ```typescript
* const extractor = new SignalExtractor();
* const builder = new SignalGraphBuilder(extractor);
*
* const scanner = new ProjectScanner();
* const astForest = await scanner.scanProject('/path/to/project', 'full');
*
* const partialGraph = await builder.buildPartialGraph(astForest);
*
* console.log(partialGraph.metadata);
* // { version: '3.0.0', signalCount: 42, emissionCount: 127, ... }
* ```
*/
export class SignalGraphBuilder {
private stats: GraphBuilderStats = <span class="cstat-no" title="statement not covered" >{</span>
filesProcessed: 0,
signalsDiscovered: 0,
emissionsFound: 0,
connectionsFound: 0,
durationMs: 0,
peakMemoryBytes: 0,
};
<span class="fstat-no" title="function not covered" > constructor(private <span class="cstat-no" title="statement not covered" >e</span>xtractor: SignalExtractor)</span> {}
/**
* Build partial signal graph from AST forest.
*
* Process:
* 1. Extract signal definitions from all files (Phase 2 regex parser)
* 2. Extract emission sites from all ASTs (Phase 3 tree-sitter queries)
* 3. Build Map indices (signal → definitions/emissions)
* 4. Generate metadata (version, counts, timestamp)
*
* @param {ASTForest} astForest - Parsed AST trees from ProjectScanner
* @returns {Promise<PartialGraph>} Graph with definitions and emissions
*
* @throws {Error} If extraction fails catastrophically
*/
<span class="fstat-no" title="function not covered" > async </span>buildPartialGraph(astForest: ASTForest): Promise<PartialGraph> {
const startTime = <span class="cstat-no" title="statement not covered" >Date.now();</span>
const startMemory = <span class="cstat-no" title="statement not covered" >process.memoryUsage().heapUsed;</span>
<span class="cstat-no" title="statement not covered" > this.resetStats();</span>
const definitions = <span class="cstat-no" title="statement not covered" >new Map<string, SignalDefinition[]>();</span>
const emissions = <span class="cstat-no" title="statement not covered" >new Map<string, EmissionSite[]>();</span>
<span class="cstat-no" title="statement not covered" > try {</span>
// Process each file in the AST forest
<span class="cstat-no" title="statement not covered" > for (const astMeta of astForest) {</span>
<span class="cstat-no" title="statement not covered" > await this.processFile(astMeta, definitions, emissions);</span>
<span class="cstat-no" title="statement not covered" > this.stats.filesProcessed++;</span>
}
// Build metadata
const metadata: GraphMetadata = <span class="cstat-no" title="statement not covered" >{</span>
version: '3.0.0',
timestamp: Date.now(),
fileCount: astForest.length,
signalCount: definitions.size,
emissionCount: this.countEmissions(emissions),
};
// Update stats
<span class="cstat-no" title="statement not covered" > this.stats.durationMs = Date.now() - startTime;</span>
<span class="cstat-no" title="statement not covered" > this.stats.peakMemoryBytes = Math.max(</span>
process.memoryUsage().heapUsed - startMemory,
0
);
<span class="cstat-no" title="statement not covered" > return { definitions, emissions, metadata };</span>
} catch (error) {
<span class="cstat-no" title="statement not covered" > console.error('Failed to build partial graph:', error);</span>
<span class="cstat-no" title="statement not covered" > throw error;</span>
}
}
/**
* Build complete signal graph from AST forest.
*
* NEW in Phase 3 HOP 3.2b: Extends partial graph with connection detection.
*
* Process:
* 1. Build partial graph (definitions + emissions) via HOP 3.2a
* 2. Extract connection sites from all ASTs (tree-sitter queries)
* 3. Build Map indices (signal → connections)
* 4. Generate complete metadata
*
* @param {ASTForest} astForest - Parsed AST trees from ProjectScanner
* @returns {Promise<SignalGraph>} Complete graph with definitions, emissions, and connections
*
* @throws {Error} If extraction fails catastrophically
*
* @example
* ```typescript
* const graph = await builder.buildFullGraph(astForest);
* console.log(graph.metadata.connectionCount); // 42
* ```
*/
<span class="fstat-no" title="function not covered" > async </span>buildFullGraph(astForest: ASTForest): Promise<SignalGraph> {
const startTime = <span class="cstat-no" title="statement not covered" >Date.now();</span>
const startMemory = <span class="cstat-no" title="statement not covered" >process.memoryUsage().heapUsed;</span>
<span class="cstat-no" title="statement not covered" > this.resetStats();</span>
// Build partial graph (definitions + emissions)
const partialGraph = <span class="cstat-no" title="statement not covered" >await this.buildPartialGraph(astForest);</span>
// Extract connections
const connections = <span class="cstat-no" title="statement not covered" >new Map<string, ConnectionSite[]>();</span>
<span class="cstat-no" title="statement not covered" > try {</span>
<span class="cstat-no" title="statement not covered" > for (const astMeta of astForest) {</span>
const { tree, filePath } = <span class="cstat-no" title="statement not covered" >astMeta;</span>
<span class="cstat-no" title="statement not covered" > try {</span>
// Extract connection sites (HOP 3.2b method)
const fileConnections = <span class="cstat-no" title="statement not covered" >await this.extractor.extractConnections(tree, filePath);</span>
<span class="cstat-no" title="statement not covered" > for (const conn of fileConnections) {</span>
const existing = <span class="cstat-no" title="statement not covered" >connections.get(conn.signalName) || [];</span>
<span class="cstat-no" title="statement not covered" > connections.set(conn.signalName, [...existing, conn]);</span>
<span class="cstat-no" title="statement not covered" > this.stats.connectionsFound++;</span>
}
} catch (error) {
<span class="cstat-no" title="statement not covered" > console.warn(`Failed to extract connections from ${filePath}:`, error);</span>
// Continue processing other files
}
}
// Build complete metadata
const metadata: GraphMetadata = <span class="cstat-no" title="statement not covered" >{</span>
version: '3.0.0',
timestamp: Date.now(),
fileCount: astForest.length,
signalCount: partialGraph.definitions.size,
emissionCount: this.countEmissions(partialGraph.emissions),
connectionCount: this.countConnections(connections),
};
// Update stats
<span class="cstat-no" title="statement not covered" > this.stats.durationMs = Date.now() - startTime;</span>
<span class="cstat-no" title="statement not covered" > this.stats.peakMemoryBytes = Math.max(</span>
process.memoryUsage().heapUsed - startMemory,
0
);
<span class="cstat-no" title="statement not covered" > return {</span>
definitions: partialGraph.definitions,
emissions: partialGraph.emissions,
connections,
metadata,
};
} catch (error) {
<span class="cstat-no" title="statement not covered" > console.error('Failed to build full graph:', error);</span>
<span class="cstat-no" title="statement not covered" > throw error;</span>
}
}
/**
* Process single file: extract definitions and emissions.
*
* @private
*/
private <span class="fstat-no" title="function not covered" >async </span>processFile(
astMeta: ASTWithMetadata,
definitions: Map<string, SignalDefinition[]>,
emissions: Map<string, EmissionSite[]>
): Promise<void> {
const { tree, filePath } = <span class="cstat-no" title="statement not covered" >astMeta;</span>
<span class="cstat-no" title="statement not covered" > try {</span>
// Extract signal definitions (Phase 2 method)
const fileDefs = <span class="cstat-no" title="statement not covered" >await this.extractor.extractSignals(filePath);</span>
<span class="cstat-no" title="statement not covered" > for (const def of fileDefs) {</span>
const existing = <span class="cstat-no" title="statement not covered" >definitions.get(def.name) || [];</span>
<span class="cstat-no" title="statement not covered" > definitions.set(def.name, [...existing, def]);</span>
<span class="cstat-no" title="statement not covered" > this.stats.signalsDiscovered++;</span>
}
// Extract emission sites (Phase 3 method)
const fileEmissions = <span class="cstat-no" title="statement not covered" >await this.extractor.extractEmissions(tree, filePath);</span>
<span class="cstat-no" title="statement not covered" > for (const emission of fileEmissions) {</span>
const existing = <span class="cstat-no" title="statement not covered" >emissions.get(emission.signalName) || [];</span>
<span class="cstat-no" title="statement not covered" > emissions.set(emission.signalName, [...existing, emission]);</span>
<span class="cstat-no" title="statement not covered" > this.stats.emissionsFound++;</span>
}
} catch (error) {
<span class="cstat-no" title="statement not covered" > console.warn(`Failed to process file ${filePath}:`, error);</span>
// Continue processing other files
}
}
/**
* Count total emissions across all signals.
*
* @private
*/
private <span class="fstat-no" title="function not covered" >countEmissions(</span>emissions: Map<string, EmissionSite[]>): number {
let count = <span class="cstat-no" title="statement not covered" >0;</span>
<span class="cstat-no" title="statement not covered" > for (const sites of emissions.values()) {</span>
<span class="cstat-no" title="statement not covered" > count += sites.length;</span>
}
<span class="cstat-no" title="statement not covered" > return count;</span>
}
/**
* Count total connections across all signals.
*
* @private
*/
private <span class="fstat-no" title="function not covered" >countConnections(</span>connections: Map<string, ConnectionSite[]>): number {
let count = <span class="cstat-no" title="statement not covered" >0;</span>
<span class="cstat-no" title="statement not covered" > for (const sites of connections.values()) {</span>
<span class="cstat-no" title="statement not covered" > count += sites.length;</span>
}
<span class="cstat-no" title="statement not covered" > return count;</span>
}
/**
* Get builder statistics from last build operation.
*
``` /**
* Get builder statistics from last build operation.
*
* @returns {GraphBuilderStats} Build metrics
*/
<span class="fstat-no" title="function not covered" > getStats(</span>): GraphBuilderStats {
<span class="cstat-no" title="statement not covered" > return { ...this.stats };</span>
}
/**
* Reset statistics counters.
*/
<span class="fstat-no" title="function not covered" > resetStats(</span>): void {
<span class="cstat-no" title="statement not covered" > this.stats = {</span>
filesProcessed: 0,
signalsDiscovered: 0,
emissionsFound: 0,
connectionsFound: 0,
durationMs: 0,
peakMemoryBytes: 0,
};
}
/**
* Get definition sites for a specific signal.
*
* Convenience method for graph consumers.
*
* @param {PartialGraph} graph - The partial graph
* @param {string} signalName - Signal to lookup
* @returns {SignalDefinition[]} Definition sites (may be empty)
*/
<span class="fstat-no" title="function not covered" > getDefinitions(</span>graph: PartialGraph, signalName: string): SignalDefinition[] {
<span class="cstat-no" title="statement not covered" > return graph.definitions.get(signalName) || [];</span>
}
/**
* Get emission sites for a specific signal.
*
* Convenience method for graph consumers.
*
* @param {PartialGraph} graph - The partial graph
* @param {string} signalName - Signal to lookup
* @returns {EmissionSite[]} Emission sites (may be empty)
*/
<span class="fstat-no" title="function not covered" > getEmissions(</span>graph: PartialGraph, signalName: string): EmissionSite[] {
<span class="cstat-no" title="statement not covered" > return graph.emissions.get(signalName) || [];</span>
}
/**
* Get connection sites for a specific signal.
*
* Convenience method for graph consumers.
* Works with both PartialGraph and SignalGraph.
*
* @param {SignalGraph} graph - The signal graph
* @param {string} signalName - Signal to lookup
* @returns {ConnectionSite[]} Connection sites (may be empty)
*/
<span class="fstat-no" title="function not covered" > getConnections(</span>graph: SignalGraph, signalName: string): ConnectionSite[] {
<span class="cstat-no" title="statement not covered" > return graph.connections.get(signalName) || [];</span>
}
/**
* Get all signal names in the graph.
*
* Works with both PartialGraph and SignalGraph.
*
* @param {PartialGraph | SignalGraph} graph - The graph
* @returns {string[]} Unique signal names (sorted)
*/
<span class="fstat-no" title="function not covered" > getAllSignalNames(</span>graph: PartialGraph | SignalGraph): string[] {
const names = <span class="cstat-no" title="statement not covered" >new Set<string>();</span>
<span class="cstat-no" title="statement not covered" > for (const name of graph.definitions.keys()) {</span>
<span class="cstat-no" title="statement not covered" > names.add(name);</span>
}
<span class="cstat-no" title="statement not covered" > for (const name of graph.emissions.keys()) {</span>
<span class="cstat-no" title="statement not covered" > names.add(name);</span>
}
// Include connections if present (SignalGraph)
<span class="cstat-no" title="statement not covered" > <span class="missing-if-branch" title="if path not taken" >I</span>if ('connections' in graph) {</span>
<span class="cstat-no" title="statement not covered" > for (const name of graph.connections.keys()) {</span>
<span class="cstat-no" title="statement not covered" > names.add(name);</span>
}
}
<span class="cstat-no" title="statement not covered" > return Array.from(names).sort();</span>
}
/**
* Find signals with emissions but no definitions (potential errors).
*
* Useful for unused signal detection (HOP 3.3).
``` /**
* Find signals with emissions but no definitions (potential errors).
*
* Useful for unused signal detection (HOP 3.3).
*
* @param {PartialGraph} graph - The partial graph
* @returns {string[]} Signal names emitted but never defined
*/
<span class="fstat-no" title="function not covered" > findUndefinedSignals(</span>graph: PartialGraph): string[] {
const undefined: string[] = <span class="cstat-no" title="statement not covered" >[];</span>
<span class="cstat-no" title="statement not covered" > for (const signalName of graph.emissions.keys()) {</span>
<span class="cstat-no" title="statement not covered" > <span class="missing-if-branch" title="if path not taken" >I</span>if (!graph.definitions.has(signalName)) {</span>
<span class="cstat-no" title="statement not covered" > undefined.push(signalName);</span>
}
}
<span class="cstat-no" title="statement not covered" > return undefined.sort();</span>
}
/**
* Find signals with definitions but no emissions (potential dead code).
*
* Useful for unused signal detection (HOP 3.3).
*
* @param {PartialGraph} graph - The partial graph
* @returns {string[]} Signal names defined but never emitted
*/
<span class="fstat-no" title="function not covered" > findUnemittedSignals(</span>graph: PartialGraph): string[] {
const unemitted: string[] = <span class="cstat-no" title="statement not covered" >[];</span>
<span class="cstat-no" title="statement not covered" > for (const signalName of graph.definitions.keys()) {</span>
<span class="cstat-no" title="statement not covered" > <span class="missing-if-branch" title="if path not taken" >I</span>if (!graph.emissions.has(signalName)) {</span>
<span class="cstat-no" title="statement not covered" > unemitted.push(signalName);</span>
}
}
<span class="cstat-no" title="statement not covered" > return unemitted.sort();</span>
}
}
</pre></td></tr></table></pre>
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