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import { Injectable } from '@angular/core';
import { SimpleFlatProperty, PropertyFEModel, DerivedFEProperty } from 'app/models';
@Injectable()
export class HierarchyNavService {
/**
* Build hirarchy structure for the tree when user selects on table row.
* First create Array<SimpleFlatProperty> and insert also the parent (PropertyFEModel) to this array.
* The Array is flat and contains SimpleFlatProperty that has parentName and uniqueId.
* Now we build hirarchy from this Array (that includes childrens) and return it for the tree
*
* @argument property: PropertyFEModel - property contains flattenedChildren array of DerivedFEProperty
* @returns Array<SimpleFlatProperty> - containing childrens Array<SimpleFlatProperty>, augmantin childrens to SimpleFlatProperty.
*/
public getSimplePropertiesTree(property: PropertyFEModel, instanceName: string): Array<SimpleFlatProperty> {
// Build Array of SimpleFlatProperty before unflatten function
let flattenProperties: Array<SimpleFlatProperty> = [];
flattenProperties.push(this.createSimpleFlatProperty(property, instanceName)); // Push the root property
_.each(property.flattenedChildren, (child: DerivedFEProperty): void => {
if (child.isChildOfListOrMap && child.schema.property.isSimpleType) return; //do not display non-complex children of list or map
flattenProperties.push(this.createSimpleFlatProperty(child, instanceName));
});
let tree = this.unflatten(flattenProperties, '', []);
return tree[0].childrens; // Return the childrens without the root.
}
public createSimpleFlatProperty = (property: PropertyFEModel | DerivedFEProperty, instanceName:string): SimpleFlatProperty => {
if (property instanceof PropertyFEModel) {
return new SimpleFlatProperty(property.uniqueId, property.name, property.name, '', instanceName);
} else {
let propName: string = (property.isChildOfListOrMap) ? property.mapKey : property.name;
return new SimpleFlatProperty(property.uniqueId, property.propertiesName, propName, property.parentName, instanceName);
}
}
/**
* Unflatten Array<SimpleFlatProperty> and build hirarchy.
* The result will be Array<SimpleFlatProperty> that augmantin with childrens for each SimpleFlatProperty.
*/
private unflatten(array: Array<SimpleFlatProperty>, parent: any, tree?: any): any {
tree = typeof tree !== 'undefined' ? tree : [];
parent = typeof parent !== 'undefined' && parent !== '' ? parent : { path: '' };
var childrens = _.filter(array, (child: SimpleFlatProperty): boolean => {
return child.parentName == parent.path;
});
if (!_.isEmpty(childrens)) {
if (parent.path == '') {
tree = childrens;
} else {
parent['childrens'] = childrens;
}
_.each(childrens, (child): void => {
this.unflatten(array, child);
});
}
return tree;
}
}
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