138 lines
4.4 KiB
JavaScript
138 lines
4.4 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: 'zoneFk',
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type: 'Number',
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required: true,
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},
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{
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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(zoneFk, parentFk = 1, filter) => {
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let conn = Self.dataSource.connector;
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let stmts = [];
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let geo = await Self.findById(parentFk);
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stmts.push(`DROP TEMPORARY TABLE IF EXISTS tmp.checkedChilds`);
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stmts.push(new ParameterizedSQL(
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`CREATE TEMPORARY TABLE tmp.checkedChilds (
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id INT,
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name VARCHAR(100),
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lft INT,
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rgt INT,
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depth BIGINT(22),
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sons DECIMAL(10, 0),
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isIncluded TINYINT
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) ENGINE = MEMORY`));
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if (parentFk === 1) {
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stmts.push(new ParameterizedSQL(
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`INSERT INTO tmp.checkedChilds
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SELECT
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zg.id,
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zg.name,
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zg.lft,
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zg.rgt,
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zg.depth,
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zg.sons,
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zi.isIncluded
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FROM zoneGeo zg
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JOIN zoneIncluded zi ON zi.geoFk = zg.id
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AND zoneFk = ?`, [zoneFk]));
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}
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let stmt = new ParameterizedSQL(
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`SELECT * FROM (
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SELECT
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zg.id,
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zg.name,
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zg.lft,
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zg.rgt,
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zg.depth,
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zg.sons,
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IF(ch.id = zg.id, isIncluded, null) isIncluded
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FROM zoneGeo zg
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JOIN tmp.checkedChilds ch ON zg.lft <= ch.lft AND zg.rgt >= ch.rgt
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UNION ALL
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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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zi.isIncluded
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FROM zoneGeo parent
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JOIN zoneGeo 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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LEFT JOIN zoneIncluded zi ON zi.geoFk = child.id
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AND zoneFk = ?
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WHERE parent.id = ?) AS nst`, [zoneFk, 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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stmt.merge('GROUP BY nst.id');
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const resultIndex = stmts.push(stmt) - 1;
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const sql = ParameterizedSQL.join(stmts, ';');
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const result = await Self.rawStmt(sql);
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const nodes = result[resultIndex];
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// Get parent nodes
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const parentNodes = nodes.filter(element => {
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return element.depth === geo.depth + 1;
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});
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const sortedLeaves = parentNodes.sort((a, b) => b.isIncluded - a.isIncluded);
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const leaves = Object.assign([], sortedLeaves);
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nestLeaves(leaves);
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function nestLeaves(elements) {
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elements.forEach(element => {
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element.childs = Object.assign([], getLeaves(element));
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nestLeaves(element.childs);
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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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