Merge pull request #1516 from ramvr1256/holidayview

feat: Holiday office multiselect replaced with TreeView

src/app/organization/holidays/create-holiday/checklist-db.class.ts

@@ -0,0 +1,46 @@
+import { BehaviorSubject } from 'rxjs';
+import { Injectable } from '@angular/core';
+import { OfficeItemNode } from './office-item.class';
+
+@Injectable({
+    providedIn: 'root'
+})
+export class ChecklistDatabase {
+
+
+    // rxjs functionality to update DOM via subscribe
+    dataChange = new BehaviorSubject<OfficeItemNode[]>([]);
+    get data(): OfficeItemNode[] {
+        return this.dataChange.value;
+    }
+    TREE_DATA = {};
+
+    constructor() {
+    }
+
+    // called every time the data in route changes
+    initialize(trie: any) {
+        this.TREE_DATA = trie;
+        const data = this.buildFileTree(this.TREE_DATA, 0);
+        this.dataChange.next(data);
+    }
+
+    // builds hierarchical tree of officeItemNodes
+    buildFileTree(obj: { [key: string]: any }, level: number): OfficeItemNode[] {
+        return Object.keys(obj).reduce<OfficeItemNode[]>((accumulator, key) => {
+            const value = obj[key];
+            const node = new OfficeItemNode();
+            node.item = key;
+
+            if (value != null) {
+                if (typeof value === 'object') {
+                    node.children = this.buildFileTree(value, level + 1);
+                } else {
+                    node.item = value;
+                }
+            }
+
+            return accumulator.concat(node);
+        }, []);
+    }
+}

src/app/organization/holidays/create-holiday/create-holiday.component.html

@@ -63,18 +63,27 @@
             <input matInput formControlName="description">
           </mat-form-field>   
           
-          <!-- TODO: Replace multi-select by custom angular material tree -->
-          <mat-form-field>
-            <mat-label>Applicable Offices</mat-label>
-            <mat-select required formControlName="offices" multiple>
-              <mat-option *ngFor="let office of officesData" [value]="{ officeId: office.id }">
-                {{ office.name }} 
-              </mat-option>
-            </mat-select>
-            <mat-error *ngIf="holidayForm.controls.offices.hasError('required')">
-              Offices is <strong>required</strong>
-            </mat-error>
-          </mat-form-field>
+          <label>Select applicable offices</label>
+
+          <mat-tree [dataSource]="dataSource" [treeControl]="treeControl">
+            <mat-tree-node *matTreeNodeDef="let node" matTreeNodeToggle matTreeNodePadding>
+              <button mat-icon-button disabled></button>
+              <mat-checkbox class="checklist-leaf-node"
+                            [checked]="checklistSelection.isSelected(node)"
+                            (change)="officeLeafItemSelectionToggle(node);">{{officesDict[node.item].name}}</mat-checkbox>
+            </mat-tree-node>
+
+            <mat-tree-node *matTreeNodeDef="let node; when: hasChild" matTreeNodePadding>
+              <button type="button" mat-icon-button matTreeNodeToggle
+                      [attr.aria-label]="'toggle ' + node.filename">
+                <mat-icon class="mat-icon-rtl-mirror">
+                  {{treeControl.isExpanded(node) ? 'expand_more' : 'chevron_right'}}
+                </mat-icon>
+              </button>
+              <mat-checkbox [checked]="descendantsAllSelected(node)"
+                            (change)="officeItemSelectionToggle(node)">{{ officesDict[node.item].name }}</mat-checkbox>
+            </mat-tree-node>
+          </mat-tree>
 
         </div>
 

src/app/organization/holidays/create-holiday/create-holiday.component.ts

@@ -1,16 +1,22 @@
 /** Angular Imports. */
-import { Component, OnInit, ViewChild } from '@angular/core';
+import { SelectionModel } from '@angular/cdk/collections';
+import { Component, OnInit, ViewChild, Injectable } from '@angular/core';
 import { FormBuilder, FormGroup, Validators, FormControl } from '@angular/forms';
 import { ActivatedRoute, Router } from '@angular/router';
 import { Dates } from 'app/core/utils/dates';
+import { MatTreeFlatDataSource, MatTreeFlattener } from '@angular/material/tree';
+import { FlatTreeControl } from '@angular/cdk/tree';
 
 /** Custom Services. */
 import { OrganizationService } from 'app/organization/organization.service';
 import { SettingsService } from 'app/settings/settings.service';
+import { OfficeItemNode } from './office-item.class';
+import { OfficeItemFlatNode } from './office-flat-item.class';
+import { ChecklistDatabase } from './checklist-db.class';
+import { CreateHoliday } from './create-holiday.service';
 
 /**
  * Create Holiday component.
- * TODO: Develop a custom angular checkbox tree and replace offices select.
  */
 @Component({
   selector: 'mifosx-create-holiday',
@@ -29,6 +35,35 @@ export class CreateHolidayComponent implements OnInit {
   minDate = new Date(2000, 0, 1);
   /** Maximum Date allowed. */
   maxDate = new Date(2100, 0, 1);
+  // Stores office data in a trie-like structure
+  officesTrie: any;
+  // Stores office data for access from DOM via Office ID
+  officesDict = {};
+
+  // Angular Material Tree Configuration start ------------
+
+  /** Map from flat node to nested node. This helps us finding the nested node to be modified */
+  flatNodeMap = new Map<OfficeItemFlatNode, OfficeItemNode>();
+
+  /** Map from nested node to flattened node. This helps us to keep the same object for selection */
+  nestedNodeMap = new Map<OfficeItemNode, OfficeItemFlatNode>();
+
+  /** A selected parent node to be inserted */
+  selectedParent: OfficeItemFlatNode | null = null;
+
+  /** The new item's name */
+  newItemName = '';
+
+  treeControl: FlatTreeControl<OfficeItemFlatNode>;
+
+  treeFlattener: MatTreeFlattener<OfficeItemNode, OfficeItemFlatNode>;
+
+  dataSource: MatTreeFlatDataSource<OfficeItemNode, OfficeItemFlatNode>;
+
+  /** The selection for checklist */
+  checklistSelection = new SelectionModel<OfficeItemFlatNode>(true /* multiple */);
+
+  // Angular Material Tree Configuration end ------------
 
   /**
    * Get offices and holiday template from `Resolver`.
@@ -43,12 +78,173 @@ export class CreateHolidayComponent implements OnInit {
               private dateUtils: Dates,
               private organizationService: OrganizationService,
               private settings: SettingsService,
-              private router: Router ) {
+              private router: Router,
+              private _database: ChecklistDatabase,
+              private createHoliday: CreateHoliday  ) {
     this.route.data.subscribe((data: { offices: any, holidayTemplate: any }) => {
       this.officesData = data.offices;
       this.repaymentSchedulingTypes = data.holidayTemplate;
+      // Constructs trie everytime data changes
+      this.constructOfficeHierarchy();
+      // Updates data in the CheckListDatabase
+      _database.initialize(this.officesTrie);
+    });
+    this.treeFlattener = new MatTreeFlattener(this.transformer, this.getLevel, this.isExpandable, this.getChildren);
+    this.treeControl = new FlatTreeControl<OfficeItemFlatNode>(this.getLevel, this.isExpandable);
+    this.dataSource = new MatTreeFlatDataSource(this.treeControl, this.treeFlattener);
+
+    // Listens for changes in CheckListDatabase
+    this._database.dataChange.subscribe((data) => {
+      this.dataSource.data = data;
     });
   }
+  constructOfficeHierarchy() {
+    const trie = {};
+    // Iterates over all the offices
+    this.officesData.forEach((office: any) => {
+      this.officesDict[office.id] = office;
+
+      let hierarchy = office.hierarchy.split('.');
+
+      // Removes empty strings
+      hierarchy = hierarchy.filter((stage: any) => {
+        return stage.length > 0;
+      });
+
+      // Temporary variable to store current object
+
+      let root = trie;
+
+      if (hierarchy.length === 0) {
+        root[office.id] = {};
+      } else {
+        // Sets root as the first object
+        root = trie[Object.keys(trie)[0]];
+        // Construction of hierarchy via Depth First Search
+          hierarchy.forEach((stage: string) => {
+          if (!(stage in root)) {
+            root[stage] = {};
+          }
+          root = root[stage];
+        });
+      }
+    });
+
+    // Sets leaf offices to null as per the requirement of Angular Material
+    this.createHoliday.setEmptyObjectsToNull(trie);
+
+    this.officesTrie = trie;
+  }
+
+  // angular material tree config start ----------------------
+
+  getLevel = (node: OfficeItemFlatNode) => node.level;
+
+  isExpandable = (node: OfficeItemFlatNode) => node.expandable;
+
+  getChildren = (node: OfficeItemNode): OfficeItemNode[] => node.children;
+
+  hasChild = (_: number, _nodeData: OfficeItemFlatNode) => _nodeData.expandable;
+
+  hasNoContent = (_: number, _nodeData: OfficeItemFlatNode) => _nodeData.item === '';
+
+  /**
+   * Transformer to convert nested node to flat node. Record the nodes in maps for later use.
+   */
+  transformer = (node: OfficeItemNode, level: number) => {
+    const existingNode = this.nestedNodeMap.get(node);
+    const flatNode = existingNode && existingNode.item === node.item ? existingNode : new OfficeItemFlatNode();
+    flatNode.item = node.item;
+    flatNode.level = level;
+    flatNode.expandable = !!node.children?.length;
+    this.flatNodeMap.set(flatNode, node);
+    this.nestedNodeMap.set(node, flatNode);
+    return flatNode;
+  }
+
+  /** Whether all the descendants of the node are selected. */
+  descendantsAllSelected(node: OfficeItemFlatNode): boolean {
+    return this.checklistSelection.isSelected(node);
+  }
+
+  /** Whether part of the descendants are selected */
+  descendantsPartiallySelected(node: OfficeItemFlatNode): boolean {
+    const descendants = this.treeControl.getDescendants(node);
+    const result = descendants.some((child) => this.checklistSelection.isSelected(child));
+    return result && !this.descendantsAllSelected(node);
+  }
+
+  setSelectedOffices() {
+    this.holidayForm.patchValue({
+      offices: this.checklistSelection.selected.map((item) => item.item),
+    });
+  }
+
+  /** Toggle the to-do item selection. Select/deselect all the descendants node */
+  officeItemSelectionToggle(node: OfficeItemFlatNode): void {
+    this.checklistSelection.toggle(node);
+    const descendants = this.treeControl.getDescendants(node);
+    this.checklistSelection.isSelected(node)
+      ? this.checklistSelection.select(...descendants)
+      : this.checklistSelection.deselect(...descendants);
+
+    // Force update for the parent
+    descendants.forEach((child) => this.checklistSelection.isSelected(child));
+    this.setSelectedOffices();
+  }
+
+  /** Toggle a leaf to-do item selection. Check all the parents to see if they changed */
+  officeLeafItemSelectionToggle(node: OfficeItemFlatNode): void {
+    this.checklistSelection.toggle(node);
+    this.setSelectedOffices();
+  }
+
+  /* Checks all the parents when a leaf node is selected/unselected */
+  checkAllParentsSelection(node: OfficeItemFlatNode): void {
+    let parent: OfficeItemFlatNode | null = this.getParentNode(node);
+    while (parent) {
+      this.checkRootNodeSelection(parent);
+      parent = this.getParentNode(parent);
+    }
+  }
+
+  /** Check root node checked state and change it accordingly */
+  checkRootNodeSelection(node: OfficeItemFlatNode): void {
+    const nodeSelected = this.checklistSelection.isSelected(node);
+    const descendants = this.treeControl.getDescendants(node);
+    const descAllSelected =
+      descendants.length > 0 &&
+      descendants.every((child) => {
+        return this.checklistSelection.isSelected(child);
+      });
+    if (nodeSelected && !descAllSelected) {
+      this.checklistSelection.deselect(node);
+    } else if (!nodeSelected && descAllSelected) {
+      this.checklistSelection.select(node);
+    }
+  }
+
+  /* Get the parent node of a node */
+  getParentNode(node: OfficeItemFlatNode): OfficeItemFlatNode | null {
+    const currentLevel = this.getLevel(node);
+
+    if (currentLevel < 1) {
+      return null;
+    }
+
+    const startIndex = this.treeControl.dataNodes.indexOf(node) - 1;
+
+    for (let i = startIndex; i >= 0; i--) {
+      const currentNode = this.treeControl.dataNodes[i];
+
+      if (this.getLevel(currentNode) < currentLevel) {
+        return currentNode;
+      }
+    }
+    return null;
+  }
+
+  // angular material tree config end ----------------------
 
   ngOnInit() {
     this.setHolidayForm();
@@ -91,20 +287,20 @@ export class CreateHolidayComponent implements OnInit {
     const locale = this.settings.language.code;
     const prevFromDate: Date = this.holidayForm.value.fromDate;
     const prevToDate: Date = this.holidayForm.value.toDate;
-    if (holidayFormData.closureDate instanceof Date) {
-      holidayFormData.fromDate = this.dateUtils.formatDate(prevFromDate, dateFormat);
-    }
-    if (holidayFormData.closureDate instanceof Date) {
-      holidayFormData.toDate = this.dateUtils.formatDate(prevToDate, dateFormat);
-    }
+    holidayFormData.fromDate = this.dateUtils.formatDate(prevFromDate, dateFormat);
+    holidayFormData.toDate = this.dateUtils.formatDate(prevToDate, dateFormat);
     if (this.holidayForm.contains('repaymentsRescheduledTo')) {
       const prevRepaymentsRescheduledTo: Date = this.holidayForm.value.repaymentsRescheduledTo;
       holidayFormData.repaymentsRescheduledTo = this.dateUtils.formatDate(prevRepaymentsRescheduledTo, dateFormat);
     }
+    const offices = this.holidayForm.value.offices.map((office: string) => {
+      return {'officeId': Number.parseInt(office, 10)};
+    });
     const data = {
       ...holidayFormData,
       dateFormat,
-      locale
+      locale,
+      offices
     };
     this.organizationService.createHoliday(data).subscribe((response: any) => {
       this.router.navigate(['../', response.resourceId], { relativeTo: this.route });

src/app/organization/holidays/create-holiday/create-holiday.service.ts

@@ -0,0 +1,17 @@
+import { Injectable } from '@angular/core';
+
+@Injectable({
+    providedIn: 'root'
+})
+export class CreateHoliday {
+    setEmptyObjectsToNull(root: any) {
+        Object.keys(root).forEach((key) => {
+            if (Object.keys(root[key]).length === 0) {
+                root[key] = null;
+            } else {
+                this.setEmptyObjectsToNull(root[key]);
+            }
+        });
+    }
+
+}

src/app/organization/holidays/create-holiday/office-flat-item.class.ts

@@ -0,0 +1,10 @@
+import { Injectable } from '@angular/core';
+
+@Injectable({
+    providedIn: 'root'
+})
+export class OfficeItemFlatNode {
+    item: string;
+    level: number;
+    expandable: boolean;
+  }

src/app/organization/holidays/create-holiday/office-item.class.ts

@@ -0,0 +1,9 @@
+import { Injectable } from '@angular/core';
+
+@Injectable({
+    providedIn: 'root'
+})
+export class OfficeItemNode {
+    children: OfficeItemNode[];
+    item: string;
+}

src/app/organization/organization.module.ts

@@ -70,6 +70,14 @@ import { StandingInstructionsHistoryComponent } from './standing-instructions-hi
 import { FundMappingComponent } from './fund-mapping/fund-mapping.component';
 import { CreateHolidayComponent } from './holidays/create-holiday/create-holiday.component';
 
+
+/** Custom Service */
+import { OfficeItemNode } from './holidays/create-holiday/office-item.class';
+import { OfficeItemFlatNode } from './holidays/create-holiday/office-flat-item.class';
+import { ChecklistDatabase } from './holidays/create-holiday/checklist-db.class';
+import { CreateHoliday } from './holidays/create-holiday/create-holiday.service';
+
+
 /**
  * Organization Module
  *
@@ -144,6 +152,12 @@ import { CreateHolidayComponent } from './holidays/create-holiday/create-holiday
     StandingInstructionsHistoryComponent,
     FundMappingComponent,
     CreateHolidayComponent,
+  ],
+  providers: [
+    CreateHoliday,
+    ChecklistDatabase,
+    OfficeItemFlatNode,
+    OfficeItemNode
   ]
 })
 export class OrganizationModule { }