88 lines
2.5 KiB
JavaScript
88 lines
2.5 KiB
JavaScript
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const ParameterizedSQL = require('loopback-connector').ParameterizedSQL;
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module.exports = Self => {
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Self.remoteMethod('getLeaves', {
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description: 'Returns the first shipped and landed possible for params',
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accessType: '',
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accepts: [{
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arg: 'parentFk',
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type: 'Number',
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default: 1,
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required: false,
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},
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{
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arg: 'filter',
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type: 'Object',
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description: 'Filter defining where, order, offset, and limit - must be a JSON-encoded string',
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http: {source: 'query'}
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}],
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returns: {
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type: ['object'],
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root: true
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},
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http: {
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path: `/getLeaves`,
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verb: 'GET'
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}
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});
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Self.getLeaves = async(parentFk = 1, filter) => {
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let conn = Self.dataSource.connector;
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let stmt = new ParameterizedSQL(
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`SELECT
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child.id,
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child.name,
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child.lft,
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child.rgt,
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child.depth,
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child.sons
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FROM department parent
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JOIN department child ON child.lft > parent.lft
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AND child.rgt < parent.rgt
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AND child.depth = parent.depth + 1
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WHERE parent.id = ?`, [parentFk]);
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// Get nodes from depth greather than Origin
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stmt.merge(conn.makeSuffix(filter));
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const nodes = await Self.rawStmt(stmt);
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if (nodes.length == 0)
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return nodes;
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// Get parent nodes
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const minorDepth = nodes.reduce((a, b) => {
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return b < a ? b : a;
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}).depth;
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const parentNodes = nodes.filter(element => {
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return element.depth === minorDepth;
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});
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const leaves = Object.assign([], parentNodes);
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nestLeaves(leaves);
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function nestLeaves(elements) {
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elements.forEach(element => {
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let childs = Object.assign([], getLeaves(element));
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if (childs.length > 0) {
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element.childs = childs;
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nestLeaves(element.childs);
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}
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});
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}
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function getLeaves(parent) {
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let elements = nodes.filter(element => {
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return element.lft > parent.lft && element.rgt < parent.rgt
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&& element.depth === parent.depth + 1;
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});
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return elements;
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}
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return leaves;
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};
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};
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