1+ import { Path , PathType } from './path' ;
2+ import { Layer } from './layer' ; // Assuming Layer is now in its own file
3+
4+ /**
5+ * Base error class for indexer-related errors
6+ */
7+ class NonApplicableIndexer extends Error { }
8+
9+ /**
10+ * Base class for path indexers
11+ * @remarks
12+ * Indexers organize paths into different structures (layers, tools, etc.)
13+ */
14+ export class Indexer {
15+ /** The indexes being managed by this indexer */
16+ protected indexes : unknown ;
17+
18+ /**
19+ * Creates a new Indexer instance
20+ * @param indexes - The indexes to manage
21+ */
22+ constructor ( indexes : unknown ) {
23+ this . indexes = indexes ;
24+ }
25+
26+ /**
27+ * Sorts a path into the appropriate index
28+ * @param path - Path to sort
29+ * @throws Error if not implemented in subclass
30+ */
31+ sortIn ( path : Path ) : void {
32+ path ;
33+ throw new Error ( 'Method not implemented.' ) ;
34+ }
35+ }
36+
37+ /**
38+ * Indexer that organizes paths by travel type (extrusion vs travel moves)
39+ */
40+ export class TravelTypeIndexer extends Indexer {
41+ /** Indexes containing arrays of paths for each travel type */
42+ protected declare indexes : Record < string , Path [ ] > ;
43+
44+ /**
45+ * Creates a new TravelTypeIndexer
46+ * @param indexes - Object containing arrays for travel and extrusion paths
47+ */
48+ constructor ( indexes : Record < string , Path [ ] > ) {
49+ super ( indexes ) ;
50+ }
51+
52+ /**
53+ * Sorts a path into either extrusion or travel paths
54+ * @param path - Path to sort
55+ */
56+ sortIn ( path : Path ) : void {
57+ if ( path . travelType === PathType . Extrusion ) {
58+ this . indexes . extrusion . push ( path ) ;
59+ } else {
60+ this . indexes . travel . push ( path ) ;
61+ }
62+ }
63+ }
64+
65+ /**
66+ * Error thrown when attempting to index a non-planar path
67+ */
68+ export class NonPlanarPathError extends NonApplicableIndexer {
69+ constructor ( ) {
70+ super ( "Non-planar paths can't be indexed by layer" ) ;
71+ }
72+ }
73+
74+ /**
75+ * Indexer that organizes paths into layers based on Z height
76+ */
77+ export class LayersIndexer extends Indexer {
78+ /** Default tolerance for layer height differences */
79+ static readonly DEFAULT_TOLERANCE = 0.05 ;
80+
81+ /** Array of layers being managed */
82+ protected declare indexes : Layer [ ] ;
83+
84+ /** Tolerance for layer height differences */
85+ private tolerance : number ;
86+
87+ /**
88+ * Creates a new LayersIndexer
89+ * @param indexes - Array to store layers
90+ * @param tolerance - Height tolerance for layer detection (default: DEFAULT_TOLERANCE)
91+ */
92+ constructor ( indexes : Layer [ ] , tolerance : number = LayersIndexer . DEFAULT_TOLERANCE ) {
93+ super ( indexes ) ;
94+ this . tolerance = tolerance ;
95+ }
96+
97+ /**
98+ * Sorts a path into the appropriate layer
99+ * @param path - Path to sort
100+ * @throws NonPlanarPathError if path is non-planar
101+ */
102+ sortIn ( path : Path ) : void {
103+ if (
104+ path . travelType === PathType . Extrusion &&
105+ path . vertices . some ( ( _ , i , arr ) => i > 3 && i % 3 === 2 && Math . abs ( arr [ i ] - arr [ i - 3 ] ) > this . tolerance )
106+ ) {
107+ throw new NonPlanarPathError ( ) ;
108+ }
109+
110+ if ( this . indexes [ this . indexes . length - 1 ] === undefined ) {
111+ this . createLayer ( path . vertices [ 2 ] ) ;
112+ }
113+
114+ if (
115+ path . travelType === PathType . Extrusion &&
116+ this . lastLayer ( ) . paths . some ( ( p ) => p . travelType === PathType . Extrusion )
117+ ) {
118+ if ( path . vertices [ 2 ] - ( this . lastLayer ( ) . z || 0 ) > this . tolerance ) {
119+ this . createLayer ( path . vertices [ 2 ] ) ;
120+ }
121+ }
122+ this . lastLayer ( ) . paths . push ( path ) ;
123+ }
124+
125+ /**
126+ * Gets the last layer in the indexes
127+ * @returns The most recent layer
128+ */
129+ private lastLayer ( ) : Layer {
130+ return this . indexes [ this . indexes . length - 1 ] ;
131+ }
132+
133+ /**
134+ * Creates a new layer at the specified Z height
135+ * @param z - Z height for the new layer
136+ */
137+ private createLayer ( z : number ) : void {
138+ const layerNumber = this . indexes . length ;
139+ const height = z - ( this . lastLayer ( ) ?. z || 0 ) ;
140+ this . indexes . push ( new Layer ( this . indexes . length , [ ] , layerNumber , height , z ) ) ;
141+ }
142+ }
143+
144+ /**
145+ * Indexer that organizes paths by tool number
146+ */
147+ export class ToolIndexer extends Indexer {
148+ /** 2D array of paths indexed by tool number */
149+ protected declare indexes : Path [ ] [ ] ;
150+
151+ /**
152+ * Creates a new ToolIndexer
153+ * @param indexes - 2D array to store paths by tool
154+ */
155+ constructor ( indexes : Path [ ] [ ] ) {
156+ super ( indexes ) ;
157+ }
158+
159+ /**
160+ * Sorts a path into the appropriate tool's path array
161+ * @param path - Path to sort
162+ */
163+ sortIn ( path : Path ) : void {
164+ if ( path . travelType === PathType . Extrusion ) {
165+ this . indexes ;
166+ this . indexes [ path . tool ] = this . indexes [ path . tool ] || [ ] ;
167+ if ( this . indexes [ path . tool ] === undefined ) {
168+ this . indexes [ path . tool ] = [ ] ;
169+ }
170+ this . indexes [ path . tool ] . push ( path ) ;
171+ }
172+ }
173+ }
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