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well-known-parser

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A WKT/WKB/EWKT/EWKB/TWKB/GeoJSON parser and serializer

github.com/thiemok/well-known-parser

thiemok/well-known-parser

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1
{"version":3,"file":"well-known-parser15.cjs","sources":["../src/wktparser.ts"],"sourcesContent":["import { GEOMETRY_TYPES } from './constants';\nimport { Point } from './point';\n\nexport interface DimensionInfo {\n hasZ?: boolean;\n hasM?: boolean;\n}\n\nexport class WktParser {\n value: string;\n position: number;\n\n constructor(value: string) {\n this.value = value;\n this.position = 0;\n }\n\n match(tokens: string[]): string | null {\n this.skipWhitespaces();\n\n for (let i = 0; i < tokens.length; i++) {\n if (this.value.substring(this.position).indexOf(tokens[i]) === 0) {\n this.position += tokens[i].length;\n return tokens[i];\n }\n }\n\n return null;\n }\n\n matchRegex(tokens: RegExp[]): RegExpMatchArray | null {\n this.skipWhitespaces();\n\n for (let i = 0; i < tokens.length; i++) {\n const match = this.value.substring(this.position).match(tokens[i]);\n\n if (match) {\n this.position += match[0].length;\n return match;\n }\n }\n\n return null;\n }\n\n isMatch(tokens: string[]): boolean {\n this.skipWhitespaces();\n\n for (let i = 0; i < tokens.length; i++) {\n if (this.value.substring(this.position).indexOf(tokens[i]) === 0) {\n this.position += tokens[i].length;\n return true;\n }\n }\n\n return false;\n }\n\n matchType(): string {\n const geometryType = this.match([\n GEOMETRY_TYPES.Point.wkt,\n GEOMETRY_TYPES.LineString.wkt,\n GEOMETRY_TYPES.Polygon.wkt,\n GEOMETRY_TYPES.MultiPoint.wkt,\n GEOMETRY_TYPES.MultiLineString.wkt,\n GEOMETRY_TYPES.MultiPolygon.wkt,\n GEOMETRY_TYPES.GeometryCollection.wkt\n ]);\n\n if (!geometryType) {\n throw new Error('Expected geometry type');\n }\n\n return geometryType;\n }\n\n matchDimension(): DimensionInfo {\n const dimension = this.match(['ZM', 'Z', 'M']);\n\n switch (dimension) {\n case 'ZM':\n return { hasZ: true, hasM: true };\n case 'Z':\n return { hasZ: true, hasM: false };\n case 'M':\n return { hasZ: false, hasM: true };\n default:\n return { hasZ: false, hasM: false };\n }\n }\n\n expectGroupStart(): void {\n if (!this.isMatch(['('])) {\n throw new Error('Expected group start');\n }\n }\n\n expectGroupEnd(): void {\n if (!this.isMatch([')'])) {\n throw new Error('Expected group end');\n }\n }\n\n matchCoordinate(options: DimensionInfo): Point {\n let match: RegExpMatchArray | null;\n\n if (options.hasZ && options.hasM) {\n match = this.matchRegex([/^(\\S*)\\s+(\\S*)\\s+(\\S*)\\s+([^\\s,)]*)/]);\n } else if (options.hasZ || options.hasM) {\n match = this.matchRegex([/^(\\S*)\\s+(\\S*)\\s+([^\\s,)]*)/]);\n } else {\n match = this.matchRegex([/^(\\S*)\\s+([^\\s,)]*)/]);\n }\n\n if (!match) {\n throw new Error('Expected coordinates');\n }\n\n if (options.hasZ && options.hasM) {\n return new Point(parseFloat(match[1]), parseFloat(match[2]), parseFloat(match[3]), parseFloat(match[4]));\n } else if (options.hasZ) {\n return new Point(parseFloat(match[1]), parseFloat(match[2]), parseFloat(match[3]), undefined);\n } else if (options.hasM) {\n return new Point(parseFloat(match[1]), parseFloat(match[2]), undefined, parseFloat(match[3]));\n } else {\n return new Point(parseFloat(match[1]), parseFloat(match[2]), undefined, undefined);\n }\n }\n\n matchCoordinates(options: DimensionInfo): Point[] {\n const coordinates: Point[] = [];\n\n do {\n const startsWithBracket = this.isMatch(['(']);\n\n coordinates.push(this.matchCoordinate(options));\n\n if (startsWithBracket) {\n this.expectGroupEnd();\n }\n } while (this.isMatch([',']));\n\n return coordinates;\n }\n\n skipWhitespaces(): void {\n while (this.position < this.value.length && this.value[this.position] === ' ') {\n this.position++;\n }\n 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