-
Notifications
You must be signed in to change notification settings - Fork 10
/
featureLayerUtils.ts
150 lines (141 loc) · 4.05 KB
/
featureLayerUtils.ts
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
import { Geometry, Feature, FeatureCollection } from 'geojson';
import { PropertiesFilter, FilterOptions } from '@nextgis/webmap';
import NgwConnector, {
CancelablePromise,
FeatureItem
} from '@nextgis/ngw-connector';
export interface FeatureRequestParams {
srs?: number;
geom_format?: string;
}
const FEATURE_REQUEST_PARAMS: FeatureRequestParams = {
srs: 4326,
geom_format: 'geojson'
};
export function createGeoJsonFeature<
G extends Geometry | null = Geometry,
P extends Record<string, any> = Record<string, any>
>(item: Pick<FeatureItem, 'id' | 'geom' | 'fields'>): Feature<G, P> {
const geometry = item.geom as G;
const feature: Feature<G, P> = {
id: item.id,
type: 'Feature',
properties: item.fields as P,
geometry
};
return feature;
}
export function getNgwLayerItem<
G extends Geometry | null = Geometry,
P extends Record<string, any> = Record<string, any>
>(
options: {
resourceId: number;
featureId: number;
connector: NgwConnector;
} & FilterOptions
): CancelablePromise<FeatureItem> {
const params: FeatureRequestParams &
FilterOptions & { [name: string]: any } = {
...FEATURE_REQUEST_PARAMS
};
return options.connector.get('feature_layer.feature.item', null, {
id: options.resourceId,
fid: options.featureId,
...params
});
}
export function getNgwLayerFeature<
G extends Geometry | null = Geometry,
P extends Record<string, any> = Record<string, any>
>(
options: {
resourceId: number;
featureId: number;
connector: NgwConnector;
} & FilterOptions
): CancelablePromise<Feature<G, P>> {
return getNgwLayerItem(options).then(item => {
return createGeoJsonFeature<G, P>(item);
});
}
function idFilterWorkAround<
G extends Geometry | null = Geometry,
P extends Record<string, any> = Record<string, any>
>(options: { filterById: any; resourceId: number; connector: NgwConnector }) {
const value = options.filterById[2];
const featureIds: number[] =
typeof value === 'number'
? [value]
: value.split(',').map((x: string) => Number(x));
if (options.filterById[1] !== 'eq' && options.filterById[1] !== 'in') {
throw new Error(
'Unable to filter by object id. Except `eq` or `in` operator'
);
}
const promises: Promise<FeatureItem>[] = featureIds.map(featureId => {
return getNgwLayerItem<G, P>({
connector: options.connector,
resourceId: options.resourceId,
featureId
});
});
return CancelablePromise.all(promises);
}
export function getNgwLayerItems<
G extends Geometry | null = Geometry,
P extends Record<string, any> = Record<string, any>
>(
options: {
resourceId: number;
connector: NgwConnector;
filters?: PropertiesFilter;
} & FilterOptions
): CancelablePromise<FeatureItem[]> {
const params: FeatureRequestParams &
FilterOptions & { [name: string]: any } = {
...FEATURE_REQUEST_PARAMS
};
const { connector, filters, limit, intersects, resourceId } = options;
if (filters) {
const filterById = filters.find(x => x[0] === 'id');
if (filterById) {
return idFilterWorkAround({ filterById, connector, resourceId });
}
filters.forEach(([field, operation, value]) => {
params[`fld_${field}__${operation}`] = `${value}`;
});
}
if (limit) {
params.limit = limit;
}
if (intersects) {
params.intersects = intersects;
}
return connector.get('feature_layer.feature.collection', null, {
id: resourceId,
...params
});
}
export function getNgwLayerFeatures<
G extends Geometry | null = Geometry,
P extends Record<string, any> = Record<string, any>
>(
options: {
resourceId: number;
connector: NgwConnector;
filters?: PropertiesFilter;
} & FilterOptions
): CancelablePromise<FeatureCollection<G, P>> {
return getNgwLayerItems(options).then((x: FeatureItem[]) => {
const features: Array<Feature<G, P>> = [];
x.forEach(y => {
features.push(createGeoJsonFeature(y));
});
const featureCollection: FeatureCollection<G, P> = {
type: 'FeatureCollection',
features
};
return featureCollection;
});
}