{"version":3,"sources":["../../index.ts"],"sourcesContent":["import { featureCollection, lineString, multiLineString } from \"@turf/helpers\";\nimport {\n  Feature,\n  FeatureCollection,\n  LineString,\n  MultiLineString,\n  MultiPolygon,\n  Polygon,\n  GeoJsonProperties,\n} from \"geojson\";\nimport { getGeom } from \"@turf/invariant\";\n\n/**\n * Converts a {@link Polygon} to {@link LineString|(Multi)LineString} or {@link MultiPolygon} to a\n * {@link FeatureCollection} of {@link LineString|(Multi)LineString}.\n *\n * @function\n * @param {Feature<Polygon|MultiPolygon>} poly Feature to convert\n * @param {Object} [options={}] Optional parameters\n * @param {Object} [options.properties={}] translates GeoJSON properties to Feature\n * @returns {FeatureCollection|Feature<LineString|MultiLinestring>} converted (Multi)Polygon to (Multi)LineString\n * @example\n * var poly = turf.polygon([[[125, -30], [145, -30], [145, -20], [125, -20], [125, -30]]]);\n *\n * var line = turf.polygonToLine(poly);\n *\n * //addToMap\n * var addToMap = [line];\n */\nfunction polygonToLine<\n  G extends Polygon | MultiPolygon,\n  P extends GeoJsonProperties = GeoJsonProperties,\n>(\n  poly: Feature<G, P> | G,\n  options: { properties?: any } = {}\n):\n  | Feature<LineString | MultiLineString, P>\n  | FeatureCollection<LineString | MultiLineString, P> {\n  const geom: any = getGeom(poly);\n  if (!options.properties && poly.type === \"Feature\") {\n    options.properties = poly.properties;\n  }\n  switch (geom.type) {\n    case \"Polygon\":\n      return singlePolygonToLine(geom, options);\n    case \"MultiPolygon\":\n      return multiPolygonToLine(geom, options);\n    default:\n      throw new Error(\"invalid poly\");\n  }\n}\n\n/**\n * @private\n */\nfunction singlePolygonToLine<\n  G extends Polygon,\n  P extends GeoJsonProperties = GeoJsonProperties,\n>(\n  poly: Feature<G, P> | G,\n  options: { properties?: any } = {}\n): Feature<LineString | MultiLineString, P> {\n  const geom = getGeom(poly);\n  const coords: any[] = geom.coordinates;\n  const properties: any = options.properties\n    ? options.properties\n    : poly.type === \"Feature\"\n      ? poly.properties\n      : {};\n\n  return coordsToLine(coords, properties);\n}\n\n/**\n * @private\n */\nfunction multiPolygonToLine<\n  G extends MultiPolygon,\n  P extends GeoJsonProperties = GeoJsonProperties,\n>(\n  multiPoly: Feature<G, P> | G,\n  options: { properties?: P } = {}\n): FeatureCollection<LineString | MultiLineString, P> {\n  const geom = getGeom(multiPoly);\n  const coords: any[] = geom.coordinates;\n  const properties: any = options.properties\n    ? options.properties\n    : multiPoly.type === \"Feature\"\n      ? multiPoly.properties\n      : {};\n\n  const lines: Array<Feature<LineString | MultiLineString, P>> = [];\n  coords.forEach((coord) => {\n    lines.push(coordsToLine(coord, properties));\n  });\n  return featureCollection(lines);\n}\n\n/**\n * @private\n */\nfunction coordsToLine<P extends GeoJsonProperties = GeoJsonProperties>(\n  coords: number[][][],\n  properties: P\n): Feature<LineString | MultiLineString, P> {\n  if (coords.length > 1) {\n    return multiLineString(coords, properties);\n  }\n  return lineString(coords[0], properties);\n}\n\nexport { polygonToLine, coordsToLine, multiPolygonToLine, singlePolygonToLine };\nexport default polygonToLine;\n"],"mappings":";AAAA,SAAS,mBAAmB,YAAY,uBAAuB;AAU/D,SAAS,eAAe;AAmBxB,SAAS,cAIP,MACA,UAAgC,CAAC,GAGoB;AACrD,QAAM,OAAY,QAAQ,IAAI;AAC9B,MAAI,CAAC,QAAQ,cAAc,KAAK,SAAS,WAAW;AAClD,YAAQ,aAAa,KAAK;AAAA,EAC5B;AACA,UAAQ,KAAK,MAAM;AAAA,IACjB,KAAK;AACH,aAAO,oBAAoB,MAAM,OAAO;AAAA,IAC1C,KAAK;AACH,aAAO,mBAAmB,MAAM,OAAO;AAAA,IACzC;AACE,YAAM,IAAI,MAAM,cAAc;AAAA,EAClC;AACF;AAKA,SAAS,oBAIP,MACA,UAAgC,CAAC,GACS;AAC1C,QAAM,OAAO,QAAQ,IAAI;AACzB,QAAM,SAAgB,KAAK;AAC3B,QAAM,aAAkB,QAAQ,aAC5B,QAAQ,aACR,KAAK,SAAS,YACZ,KAAK,aACL,CAAC;AAEP,SAAO,aAAa,QAAQ,UAAU;AACxC;AAKA,SAAS,mBAIP,WACA,UAA8B,CAAC,GACqB;AACpD,QAAM,OAAO,QAAQ,SAAS;AAC9B,QAAM,SAAgB,KAAK;AAC3B,QAAM,aAAkB,QAAQ,aAC5B,QAAQ,aACR,UAAU,SAAS,YACjB,UAAU,aACV,CAAC;AAEP,QAAM,QAAyD,CAAC;AAChE,SAAO,QAAQ,CAAC,UAAU;AACxB,UAAM,KAAK,aAAa,OAAO,UAAU,CAAC;AAAA,EAC5C,CAAC;AACD,SAAO,kBAAkB,KAAK;AAChC;AAKA,SAAS,aACP,QACA,YAC0C;AAC1C,MAAI,OAAO,SAAS,GAAG;AACrB,WAAO,gBAAgB,QAAQ,UAAU;AAAA,EAC3C;AACA,SAAO,WAAW,OAAO,CAAC,GAAG,UAAU;AACzC;AAGA,IAAO,+BAAQ;","names":[]}