141 lines
3.6 KiB
Go
141 lines
3.6 KiB
Go
// Copyright © 2016 Abcum Ltd
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package fncs
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import (
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"context"
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"github.com/abcum/surreal/sql"
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"github.com/abcum/surreal/util/geof"
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)
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func geoPoint(ctx context.Context, args ...interface{}) (interface{}, error) {
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switch len(args) {
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case 1:
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if p, ok := ensurePoint(args[0]); ok {
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return p, nil
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}
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if p := ensureFloats(args[0]); len(p) == 2 {
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return sql.NewPoint(p[0], p[1]), nil
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}
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case 2:
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if lat, ok := ensureFloat(args[0]); ok {
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if lng, ok := ensureFloat(args[1]); ok {
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return sql.NewPoint(lat, lng), nil
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}
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}
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}
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return nil, nil
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}
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func geoCircle(ctx context.Context, args ...interface{}) (interface{}, error) {
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if cen, ok := ensurePoint(args[0]); ok {
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if rad, ok := ensureFloat(args[1]); ok {
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return sql.NewCircle(cen, rad), nil
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}
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}
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if val := ensureFloats(args[0]); len(val) == 2 {
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cen := sql.NewPoint(val[0], val[1])
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if rad, ok := ensureFloat(args[1]); ok {
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return sql.NewCircle(cen, rad), nil
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}
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}
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return nil, nil
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}
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func geoPolygon(ctx context.Context, args ...interface{}) (interface{}, error) {
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switch len(args) {
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case 0, 2:
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// Not enough arguments, so just ignore
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case 1:
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var pnts []*sql.Point
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if a, ok := ensureSlice(args[0]); ok {
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for _, a := range a {
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if p, _ := ensurePoint(a); p != nil {
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pnts = append(pnts, p)
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} else if p := ensureFloats(a); len(p) == 2 {
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pnts = append(pnts, sql.NewPoint(p[0], p[1]))
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} else {
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return nil, nil
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}
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}
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return sql.NewPolygon(pnts...), nil
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}
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default:
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var pnts []*sql.Point
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for _, a := range args {
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if p, _ := ensurePoint(a); p != nil {
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pnts = append(pnts, p)
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} else if p := ensureFloats(a); len(p) == 2 {
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pnts = append(pnts, sql.NewPoint(p[0], p[1]))
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} else {
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return nil, nil
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}
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}
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return sql.NewPolygon(pnts...), nil
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}
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return nil, nil
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}
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func geoContains(ctx context.Context, args ...interface{}) (interface{}, error) {
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if a, ok := ensurePolygon(args[0]); ok {
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if b, ok := ensurePoint(args[1]); ok {
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return geof.Contains(a, b), nil
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}
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}
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return false, nil
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}
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func geoDistance(ctx context.Context, args ...interface{}) (interface{}, error) {
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if pnt, ok := ensurePoint(args[0]); ok {
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if frm, ok := ensurePoint(args[1]); ok {
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return geof.Haversine(pnt, frm), nil
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}
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}
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return -1, nil
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}
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func geoInside(ctx context.Context, args ...interface{}) (interface{}, error) {
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if a, ok := ensurePoint(args[0]); ok {
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if b, ok := ensurePolygon(args[1]); ok {
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return geof.Inside(a, b), nil
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}
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}
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return false, nil
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}
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func geoIntersects(ctx context.Context, args ...interface{}) (interface{}, error) {
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if a, ok := ensureGeometry(args[0]); ok {
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if b, ok := ensureGeometry(args[1]); ok {
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return geof.Intersects(a, b), nil
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}
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}
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return false, nil
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}
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func geoHashDecode(ctx context.Context, args ...interface{}) (interface{}, error) {
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s, _ := ensureString(args[0])
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return geof.GeohashDecode(s), nil
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}
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func geoHashEncode(ctx context.Context, args ...interface{}) (interface{}, error) {
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if pnt, ok := ensurePoint(args[0]); ok {
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if acc, ok := ensureInt(args[1]); ok {
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return geof.GeohashEncode(pnt, acc), nil
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}
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}
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return nil, nil
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}
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