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51 lines
1.2 KiB
51 lines
1.2 KiB
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export default function (style) {
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const styleIDs = [];
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const sourceIDs = [];
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const compositedSourceLayers = [];
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for (const id in style.sources) {
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const source = style.sources[id];
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if (source.type !== "vector")
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continue;
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const match = /^mapbox:\/\/(.*)/.exec(source.url);
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if (!match)
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continue;
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styleIDs.push(id);
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sourceIDs.push(match[1]);
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}
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if (styleIDs.length < 2)
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return style;
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styleIDs.forEach((id) => {
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delete style.sources[id];
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});
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const compositeID = sourceIDs.join(",");
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style.sources[compositeID] = {
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"type": "vector",
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"url": `mapbox://${compositeID}`
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};
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style.layers.forEach((layer) => {
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if (styleIDs.indexOf(layer.source) >= 0) {
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layer.source = compositeID;
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if ('source-layer' in layer) {
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if (compositedSourceLayers.indexOf(layer['source-layer']) >= 0) {
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throw new Error('Conflicting source layer names');
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} else {
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compositedSourceLayers.push(layer['source-layer']);
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}
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}
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}
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});
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return style;
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}
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