Work towards enabling typescript's strict mode

packages/turf-bbox-clip/index.ts

@@ -69,10 +69,10 @@ export default function bboxClip<
   }
 }
 
-function clipPolygon(rings: any[], bbox: BBox) {
+function clipPolygon(rings: number[][][], bbox: BBox) {
   const outRings = [];
   for (const ring of rings) {
-    const clipped: any = polygonclip(ring, bbox);
+    const clipped = polygonclip(ring, bbox);
     if (clipped.length > 0) {
       if (
         clipped[0][0] !== clipped[clipped.length - 1][0] ||

packages/turf-bbox-clip/lib/lineclip.ts

@@ -1,15 +1,21 @@
-// Cohen-Sutherland line clippign algorithm, adapted to efficiently
+// Cohen-Sutherland line clipping algorithm, adapted to efficiently
 // handle polylines rather than just segments
 
-export function lineclip(points, bbox, result) {
+import { BBox } from "@turf/helpers";
+
+export function lineclip(
+  points: number[][],
+  bbox: BBox,
+  result?: number[][][]
+): number[][][] {
   var len = points.length,
     codeA = bitCode(points[0], bbox),
-    part = [],
+    part = [] as number[][],
     i,
-    a,
-    b,
     codeB,
     lastCode;
+  let a: number[];
+  let b: number[];
 
   if (!result) result = [];
 
@@ -41,11 +47,11 @@ export function lineclip(points, bbox, result) {
         break;
       } else if (codeA) {
         // a outside, intersect with clip edge
-        a = intersect(a, b, codeA, bbox);
+        a = intersect(a, b, codeA, bbox)!;
         codeA = bitCode(a, bbox);
       } else {
         // b outside
-        b = intersect(a, b, codeB, bbox);
+        b = intersect(a, b, codeB, bbox)!;
         codeB = bitCode(b, bbox);
       }
     }
@@ -60,8 +66,8 @@ export function lineclip(points, bbox, result) {
 
 // Sutherland-Hodgeman polygon clipping algorithm
 
-export function polygonclip(points, bbox) {
-  var result, edge, prev, prevInside, i, p, inside;
+export function polygonclip(points: number[][], bbox: BBox): number[][] {
+  var result: number[][], edge, prev, prevInside, i, p, inside;
 
   // clip against each side of the clip rectangle
   for (edge = 1; edge <= 8; edge *= 2) {
@@ -74,7 +80,7 @@ export function polygonclip(points, bbox) {
       inside = !(bitCode(p, bbox) & edge);
 
       // if segment goes through the clip window, add an intersection
-      if (inside !== prevInside) result.push(intersect(prev, p, edge, bbox));
+      if (inside !== prevInside) result.push(intersect(prev, p, edge, bbox)!);
 
       if (inside) result.push(p); // add a point if it's inside
 
@@ -87,12 +93,17 @@ export function polygonclip(points, bbox) {
     if (!points.length) break;
   }
 
-  return result;
+  return result!;
 }
 
 // intersect a segment against one of the 4 lines that make up the bbox
 
-function intersect(a, b, edge, bbox) {
+function intersect(
+  a: number[],
+  b: number[],
+  edge: number,
+  bbox: BBox
+): number[] | null {
   return edge & 8
     ? [a[0] + ((b[0] - a[0]) * (bbox[3] - a[1])) / (b[1] - a[1]), bbox[3]] // top
     : edge & 4
@@ -111,7 +122,7 @@ function intersect(a, b, edge, bbox) {
 //    mid  0001  0000  0010
 // bottom  0101  0100  0110
 
-function bitCode(p, bbox) {
+function bitCode(p: number[], bbox: BBox) {
   var code = 0;
 
   if (p[0] < bbox[0]) code |= 1;

packages/turf-boolean-crosses/index.ts

@@ -2,7 +2,14 @@ import lineIntersect from "@turf/line-intersect";
 import { polygonToLine } from "@turf/polygon-to-line";
 import booleanPointInPolygon from "@turf/boolean-point-in-polygon";
 import { getGeom } from "@turf/invariant";
-import { point, Feature, Geometry, Polygon } from "@turf/helpers";
+import {
+  point,
+  Feature,
+  Geometry,
+  Polygon,
+  LineString,
+  MultiPoint,
+} from "@turf/helpers";
 
 /**
  * Boolean-Crosses returns True if the intersection results in a geometry whose dimension is one less than
@@ -66,7 +73,10 @@ function booleanCrosses(
   }
 }
 
-function doMultiPointAndLineStringCross(multiPoint, lineString) {
+function doMultiPointAndLineStringCross(
+  multiPoint: MultiPoint,
+  lineString: LineString
+) {
   var foundIntPoint = false;
   var foundExtPoint = false;
   var pointLength = multiPoint.coordinates.length;
@@ -95,7 +105,7 @@ function doMultiPointAndLineStringCross(multiPoint, lineString) {
   return foundIntPoint && foundExtPoint;
 }
 
-function doLineStringsCross(lineString1, lineString2) {
+function doLineStringsCross(lineString1: LineString, lineString2: LineString) {
   var doLinesIntersect = lineIntersect(lineString1, lineString2);
   if (doLinesIntersect.features.length > 0) {
     for (var i = 0; i < lineString1.coordinates.length - 1; i++) {
@@ -120,7 +130,7 @@ function doLineStringsCross(lineString1, lineString2) {
   return false;
 }
 
-function doLineStringAndPolygonCross(lineString, polygon: Polygon) {
+function doLineStringAndPolygonCross(lineString: LineString, polygon: Polygon) {
   const line: any = polygonToLine(polygon);
   const doLinesIntersect = lineIntersect(lineString, line);
   if (doLinesIntersect.features.length > 0) {
@@ -129,21 +139,19 @@ function doLineStringAndPolygonCross(lineString, polygon: Polygon) {
   return false;
 }
 
-function doesMultiPointCrossPoly(multiPoint, polygon) {
+function doesMultiPointCrossPoly(multiPoint: MultiPoint, polygon: Polygon) {
   var foundIntPoint = false;
   var foundExtPoint = false;
-  var pointLength = multiPoint.coordinates[0].length;
-  var i = 0;
-  while (i < pointLength && foundIntPoint && foundExtPoint) {
-    if (booleanPointInPolygon(point(multiPoint.coordinates[0][i]), polygon)) {
+  var pointLength = multiPoint.coordinates.length;
+  for (let i = 0; i < pointLength && (!foundIntPoint || !foundExtPoint); i++) {
+    if (booleanPointInPolygon(point(multiPoint.coordinates[i]), polygon)) {
       foundIntPoint = true;
     } else {
       foundExtPoint = true;
     }
-    i++;
   }
 
-  return foundExtPoint && foundExtPoint;
+  return foundExtPoint && foundIntPoint;
 }
 
 /**
@@ -158,7 +166,12 @@ function doesMultiPointCrossPoly(multiPoint, polygon) {
  * @param {boolean} incEnd whether the point is allowed to fall on the line ends
  * @returns {boolean} true/false
  */
-function isPointOnLineSegment(lineSegmentStart, lineSegmentEnd, pt, incEnd) {
+function isPointOnLineSegment(
+  lineSegmentStart: number[],
+  lineSegmentEnd: number[],
+  pt: number[],
+  incEnd: boolean
+) {
   var dxc = pt[0] - lineSegmentStart[0];
   var dyc = pt[1] - lineSegmentStart[1];
   var dxl = lineSegmentEnd[0] - lineSegmentStart[0];

packages/turf-boolean-crosses/test/false/MultiPoint/Polygon/MultiPointNotCrossPolygon.geojson

@@ -0,0 +1,32 @@
+{
+  "type": "FeatureCollection",
+  "features": [
+    {
+      "type": "Feature",
+      "properties": {},
+      "geometry": {
+        "type": "MultiPoint",
+        "coordinates": [
+          [3, 3],
+          [4, 4]
+        ]
+      }
+    },
+    {
+      "type": "Feature",
+      "properties": {},
+      "geometry": {
+        "type": "Polygon",
+        "coordinates": [
+          [
+            [0, 2],
+            [2, 2],
+            [2, 0],
+            [0, 0],
+            [0, 2]
+          ]
+        ]
+      }
+    }
+  ]
+}

packages/turf-boolean-crosses/test/true/MultiPoint/Polygon/MultiPointsCrossPolygon.geojson

@@ -0,0 +1,32 @@
+{
+  "type": "FeatureCollection",
+  "features": [
+    {
+      "type": "Feature",
+      "properties": {},
+      "geometry": {
+        "type": "MultiPoint",
+        "coordinates": [
+          [3, 3],
+          [1, 1]
+        ]
+      }
+    },
+    {
+      "type": "Feature",
+      "properties": {},
+      "geometry": {
+        "type": "Polygon",
+        "coordinates": [
+          [
+            [0, 2],
+            [2, 2],
+            [2, 0],
+            [0, 0],
+            [0, 2]
+          ]
+        ]
+      }
+    }
+  ]
+}

packages/turf-boolean-overlap/index.ts

@@ -69,7 +69,7 @@ export default function booleanOverlap(
     case "MultiLineString":
       segmentEach(feature1, (segment1) => {
         segmentEach(feature2, (segment2) => {
-          if (lineOverlap(segment1, segment2).features.length) overlap++;
+          if (lineOverlap(segment1!, segment2!).features.length) overlap++;
         });
       });
       break;
@@ -78,7 +78,7 @@ export default function booleanOverlap(
     case "MultiPolygon":
       segmentEach(feature1, (segment1) => {
         segmentEach(feature2, (segment2) => {
-          if (lineIntersect(segment1, segment2).features.length) overlap++;
+          if (lineIntersect(segment1!, segment2!).features.length) overlap++;
         });
       });
       break;

packages/turf-boolean-parallel/index.ts

@@ -1,7 +1,13 @@
 import cleanCoords from "@turf/clean-coords";
 import lineSegment from "@turf/line-segment";
 import rhumbBearing from "@turf/rhumb-bearing";
-import { bearingToAzimuth, Feature, LineString } from "@turf/helpers";
+import {
+  bearingToAzimuth,
+  Feature,
+  Geometry,
+  LineString,
+  Position,
+} from "@turf/helpers";
 
 /**
  * Boolean-Parallel returns True if each segment of `line1` is parallel to the correspondent segment of `line2`
@@ -49,7 +55,7 @@ function booleanParallel(
  * @param {Geometry|Feature<LineString>} segment2 Geometry or Feature
  * @returns {boolean} if slopes are equal
  */
-function isParallel(segment1, segment2) {
+function isParallel(segment1: Position[], segment2: Position[]) {
   var slope1 = bearingToAzimuth(rhumbBearing(segment1[0], segment1[1]));
   var slope2 = bearingToAzimuth(rhumbBearing(segment2[0], segment2[1]));
   return slope1 === slope2;
@@ -63,8 +69,9 @@ function isParallel(segment1, segment2) {
  * @param {string} name of the variable
  * @returns {string} Feature's type
  */
-function getType(geojson, name) {
-  if (geojson.geometry && geojson.geometry.type) return geojson.geometry.type;
+function getType(geojson: Geometry | Feature<any>, name: string) {
+  if ((geojson as Feature).geometry && (geojson as Feature).geometry.type)
+    return (geojson as Feature).geometry.type;
   if (geojson.type) return geojson.type; // if GeoJSON geometry
   throw new Error("Invalid GeoJSON object for " + name);
 }

packages/turf-boolean-touches/index.ts

@@ -1,7 +1,7 @@
 import booleanPointOnLine from "@turf/boolean-point-on-line";
 import booleanPointInPolygon from "@turf/boolean-point-in-polygon";
 import { getGeom } from "@turf/invariant";
-import { Feature, Geometry } from "@turf/helpers";
+import { Feature, Geometry, LineString, Point } from "@turf/helpers";
 
 /**
  * Boolean-touches true if none of the points common to both geometries
@@ -766,7 +766,7 @@ function booleanTouches(
   }
 }
 
-function isPointOnLineEnd(point, line) {
+function isPointOnLineEnd(point: Point, line: LineString) {
   if (compareCoords(line.coordinates[0], point.coordinates)) return true;
   if (
     compareCoords(
@@ -786,7 +786,7 @@ function isPointOnLineEnd(point, line) {
  * @param {Position} pair2 point [x,y]
  * @returns {boolean} true/false if coord pairs match
  */
-function compareCoords(pair1, pair2) {
+function compareCoords(pair1: number[], pair2: number[]) {
   return pair1[0] === pair2[0] && pair1[1] === pair2[1];
 }
 

packages/turf-boolean-valid/index.ts

@@ -1,5 +1,11 @@
 import { getGeom } from "@turf/invariant";
-import { polygon, lineString, Feature, Geometry } from "@turf/helpers";
+import {
+  polygon,
+  lineString,
+  Feature,
+  Geometry,
+  Position,
+} from "@turf/helpers";
 import booleanDisjoint from "@turf/boolean-disjoint";
 import booleanCrosses from "@turf/boolean-crosses";
 import lineIntersect from "@turf/line-intersect";
@@ -87,14 +93,14 @@ export default function booleanValid(feature: Feature<any> | Geometry) {
   }
 }
 
-function checkRingsClose(geom) {
+function checkRingsClose(geom: Position[]) {
   return (
     geom[0][0] === geom[geom.length - 1][0] ||
     geom[0][1] === geom[geom.length - 1][1]
   );
 }
 
-function checkRingsForSpikesPunctures(geom) {
+function checkRingsForSpikesPunctures(geom: Position[]) {
   for (var i = 0; i < geom.length - 1; i++) {
     var point = geom[i];
     for (var ii = i + 1; ii < geom.length - 2; ii++) {
@@ -105,7 +111,11 @@ function checkRingsForSpikesPunctures(geom) {
   return false;
 }
 
-function checkPolygonAgainstOthers(poly, geom, index) {
+function checkPolygonAgainstOthers(
+  poly: Position[][],
+  geom: Position[][][],
+  index: number
+) {
   var polyToCheck = polygon(poly);
   for (var i = index + 1; i < geom.length; i++) {
     if (!booleanDisjoint(polyToCheck, polygon(geom[i]))) {