64 lines
1.5 KiB
JavaScript
64 lines
1.5 KiB
JavaScript
const fs = require('fs');
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const util = require('util')
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const { read } = require('fast-exif');
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const iptc = require('node-iptc');
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const readFile = util.promisify(fs.readFile)
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function convertDMSToDD(dms, positiveDirection) {
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const res = dms
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.map((item, i) => {
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return item / Math.pow(60, i);
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})
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.reduce((a, b) => a + b);
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return positiveDirection ? res : -res;
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}
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function transformMetaToNodeData(exifData, iptcData) {
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const gps = { longitude: null, latitude: null };
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if (exifData) {
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if (
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exifData.gps &&
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exifData.gps.GPSLongitude &&
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exifData.gps.GPSLatitude
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) {
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gps.longitude = convertDMSToDD(
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exifData.gps.GPSLongitude,
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exifData.gps.GPSLongitudeRef === 'E'
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);
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gps.latitude = convertDMSToDD(
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exifData.gps.GPSLatitude,
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exifData.gps.GPSLatitudeRef === 'N'
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);
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}
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}
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return {
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exif: exifData?.exif,
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gps,
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meta: {
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dateTaken: exifData?.exif?.DateTimeOriginal
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},
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iptc: iptcData || undefined
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};
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}
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exports.onCreateNode = async function ({ node, getNode, actions }) {
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const { createNodeField } = actions;
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if (node.internal.type === 'ImageSharp') {
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const parent = getNode(node.parent);
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const file = await readFile(parent.absolutePath)
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const iptcData = iptc(file)
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const exifData = await read(parent.absolutePath)
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createNodeField({
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node,
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name: 'imageMeta',
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value: transformMetaToNodeData(exifData, iptcData)
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});
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}
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} |