From 79785250ac84e66908b03826a131b86c511f76bb Mon Sep 17 00:00:00 2001
From: cagataycivici <cagatay.civici@gmail.com>
Date: Wed, 7 Aug 2019 11:26:14 +0300
Subject: [PATCH] Filtering for TreeTable

---
 src/components/treetable/TreeTable.vue      | 121 +++++++++++++++++++-
 src/router.js                               |   5 +
 src/views/treetable/TreeTableFilterDemo.vue |  96 ++++++++++++++++
 src/views/treetable/TreeTableSubMenu.vue    |   1 +
 4 files changed, 218 insertions(+), 5 deletions(-)
 create mode 100644 src/views/treetable/TreeTableFilterDemo.vue

diff --git a/src/components/treetable/TreeTable.vue b/src/components/treetable/TreeTable.vue
index d31765f4a..f443225dd 100644
--- a/src/components/treetable/TreeTable.vue
+++ b/src/components/treetable/TreeTable.vue
@@ -56,7 +56,7 @@
                 <slot name="paginatorRight"></slot>
             </template>
         </TTPaginator>
-        <div class="p-treetable-footer" v-if="$scopedSlots.header">
+        <div class="p-treetable-footer" v-if="$scopedSlots.footer">
             <slot name="footer"></slot>
         </div>
     </div>
@@ -64,6 +64,7 @@
 
 <script>
 import ObjectUtils from '../utils/ObjectUtils';
+import FilterUtils from '../utils/FilterUtils';
 import DomHandler from '../utils/DomHandler';
 import TreeTableColumnSlot from './TreeTableColumnSlot';
 import TreeTableRowLoader from './TreeTableRowLoader';
@@ -170,6 +171,14 @@ export default {
         sortMode: {
             type: String,
             default: 'single'
+        },
+        filters: {
+            type: Object,
+            default: null
+        },
+        filterMode: {
+            type: String,
+            default: 'lenient'
         }
     },
     data() {
@@ -404,8 +413,104 @@ export default {
 
             return (this.d_multiSortMeta[index].order * result);
         },
-        isNodeSelected() {
-            return false;
+        filter(value) {
+            let filteredNodes = [];
+            const strict = this.filterMode === 'strict';
+            let valueChanged = false;
+
+            for (let node of value) {
+                let copyNode = {...node};
+                let localMatch = true;
+                let globalMatch = false;
+
+                for (let j = 0; j < this.columns.length; j++) {
+                    let col = this.columns[j];
+                    let filterField = col.field;
+
+                    //local
+                    if (this.filters.hasOwnProperty(col.field)) {
+                        let filterMatchMode = col.filterMatchMode;
+                        let filterValue = this.filters[col.field];
+                        let filterConstraint = FilterUtils[col.filterMatchMode];
+                        let paramsWithoutNode = {filterField, filterValue, filterConstraint, strict};
+                        
+                        if ((strict && !(this.findFilteredNodes(copyNode, paramsWithoutNode) || this.isFilterMatched(copyNode, paramsWithoutNode))) ||
+                            (!strict && !(this.isFilterMatched(copyNode, paramsWithoutNode) || this.findFilteredNodes(copyNode, paramsWithoutNode)))) {
+                                localMatch = false;
+                        }
+
+                        if (!localMatch) {
+                            break;
+                        }
+                    }
+
+                    //global
+                    if (this.hasGlobalFilter && !globalMatch) {
+                        let copyNodeForGlobal = {...copyNode};
+                        let globalFilterValue = this.props.globalFilter;
+                        let globalFilterConstraint = ObjectUtils.filterConstraints['contains'];
+                        paramsWithoutNode = {filterField, globalFilterValue, globalFilterConstraint, strict};
+
+                        if ((strict && (this.findFilteredNodes(copyNodeForGlobal, paramsWithoutNode) || this.isFilterMatched(copyNodeForGlobal, paramsWithoutNode))) ||
+                            (!strict && (this.isFilterMatched(copyNodeForGlobal, paramsWithoutNode) || this.findFilteredNodes(copyNodeForGlobal, paramsWithoutNode)))) {
+                                globalMatch = true;
+                                copyNode = copyNodeForGlobal;
+                        }
+                    }
+                }
+
+                let matches = localMatch;
+                if (this.hasGlobalFilter) {
+                    matches = localMatch && globalMatch;
+                }
+
+                if (matches) {
+                    filteredNodes.push(copyNode);
+                }
+
+                valueChanged = valueChanged || !localMatch || globalMatch;
+            }
+
+            return valueChanged ? filteredNodes : value;
+        },
+        findFilteredNodes(node, paramsWithoutNode) {
+            if (node) {
+                let matched = false;
+                if (node.children) {
+                    let childNodes = [...node.children];
+                    node.children = [];
+                    for (let childNode of childNodes) {
+                        let copyChildNode = {...childNode};
+                        if (this.isFilterMatched(copyChildNode, paramsWithoutNode)) {
+                            matched = true;
+                            node.children.push(copyChildNode);
+                        }
+                    }
+                }
+                
+                if (matched) {
+                    return true;
+                }
+            }
+        },
+        isFilterMatched(node, {filterField, filterValue, filterConstraint, strict}) {
+            let matched = false;
+            let dataFieldValue = ObjectUtils.resolveFieldData(node.data, filterField);
+            if (filterConstraint(dataFieldValue, filterValue)) {
+                matched = true;
+            }
+
+            if (!matched || (strict && !this.isNodeLeaf(node))) {
+                matched = this.findFilteredNodes(node, {filterField, filterValue, filterConstraint, strict}) || matched;
+            }
+
+            return matched;
+        },
+        isNodeSelected(node) {
+            return (this.selectionMode && this.selectionKeys) ? this.selectionKeys[node.key] === true : false;
+        },
+        isNodeLeaf(node) {
+            return node.leaf === false ? false : !(node.children && node.children.length);
         }
     },
     computed: {
@@ -436,9 +541,9 @@ export default {
                             data = this.sortMultiple(data);
                     }
 
-                    /*if (this.hasFilters) {
+                    if (this.hasFilters) {
                         data = this.filter(data);
-                    }*/
+                    }
 
                     return data;
                 }
@@ -477,6 +582,12 @@ export default {
 
             return hasFooter;
         },
+        hasFilters() {
+            return this.filters && Object.keys(this.filters).length > 0 && this.filters.constructor === Object;
+        },
+        hasGlobalFilter() {
+            return this.filters && this.filters.hasOwnProperty('global');
+        },
         paginatorTop() {
             return this.paginator && (this.paginatorPosition !== 'bottom' || this.paginatorPosition === 'both');
         },
diff --git a/src/router.js b/src/router.js
index 9c6e1ac34..65d860f13 100644
--- a/src/router.js
+++ b/src/router.js
@@ -400,6 +400,11 @@ export default new Router({
 			path: '/treetable/sort',
 			name: 'treetablesort',
 			component: () => import('./views/treetable/TreeTableSortDemo.vue')
+        },
+        {
+			path: '/treetable/filter',
+			name: 'treetablefilter',
+			component: () => import('./views/treetable/TreeTableFilterDemo.vue')
         },
 		{
 			path: '/tristatecheckbox',
diff --git a/src/views/treetable/TreeTableFilterDemo.vue b/src/views/treetable/TreeTableFilterDemo.vue
new file mode 100644
index 000000000..64f627c38
--- /dev/null
+++ b/src/views/treetable/TreeTableFilterDemo.vue
@@ -0,0 +1,96 @@
+<template>
+    <div>
+        <TreeTableSubMenu />
+
+        <div class="content-section introduction">
+            <div class="feature-intro">
+                <h1>TreeTable - Filter</h1>
+                <p>Filtering is enabled by defining a filter template per column to populate the filters property of the TreTable.</p>
+            </div>
+        </div>
+
+        <div class="content-section implementation">
+            <h3>Lenient Filter</h3>
+            <TreeTable :value="nodes" :filters="filters" filterMode="lenient">
+                <template #header>
+                    <div style="text-align: right">
+                        <i class="pi pi-search" style="margin: 4px 4px 0px 0px;"></i>
+                        <InputText v-model="filters['global']" placeholder="Global Search" size="50" />
+                    </div>
+                </template>
+                <Column field="name" header="Name" :expander="true">
+                    <template #filter>
+                        <InputText type="text" v-model="filters['name']" class="p-column-filter" />
+                    </template>
+                </Column>
+                <Column field="size" header="Size">
+                    <template #filter>
+                        <InputText type="text" v-model="filters['size']" class="p-column-filter" />
+                    </template>
+                </Column>
+                <Column field="type" header="Type">
+                    <template #filter>
+                        <InputText type="text" v-model="filters['type']" class="p-column-filter" />
+                    </template>
+                </Column>
+            </TreeTable>
+
+            <h3>Strict Filter</h3>
+            <TreeTable :value="nodes" :filters="filters" filterMode="strict">
+                <template #header>
+                    <div style="text-align: right">
+                        <i class="pi pi-search" style="margin: 4px 4px 0px 0px;"></i>
+                        <InputText v-model="filters['global']" placeholder="Global Search" size="50" />
+                    </div>
+                </template>
+                <Column field="name" header="Name" :expander="true">
+                    <template #filter>
+                        <InputText type="text" v-model="filters['name']" class="p-column-filter" />
+                    </template>
+                </Column>
+                <Column field="size" header="Size">
+                    <template #filter>
+                        <InputText type="text" v-model="filters['size']" class="p-column-filter" />
+                    </template>
+                </Column>
+                <Column field="type" header="Type">
+                    <template #filter>
+                        <InputText type="text" v-model="filters['type']" class="p-column-filter" />
+                    </template>
+                </Column>
+            </TreeTable>
+        </div>
+
+        <TreeTableDoc />
+    </div>
+</template>
+
+<script>
+import NodeService from '../../service/NodeService';
+import TreeTableDoc from './TreeTableDoc';
+import TreeTableSubMenu from './TreeTableSubMenu';
+
+export default {
+    data() {
+        return {
+            filters: {},
+            nodes: null
+        }
+    },
+    nodeService: null,
+    created() {
+        this.nodeService = new NodeService();
+    },
+    mounted() {
+        this.nodeService.getTreeTableNodes().then(data => this.nodes = data);
+    },
+    components: {
+        'TreeTableDoc': TreeTableDoc,
+        'TreeTableSubMenu': TreeTableSubMenu
+    }
+}
+</script>
+
+<style scoped>
+
+</style>
\ No newline at end of file
diff --git a/src/views/treetable/TreeTableSubMenu.vue b/src/views/treetable/TreeTableSubMenu.vue
index 0aa80b17e..005a20b8f 100644
--- a/src/views/treetable/TreeTableSubMenu.vue
+++ b/src/views/treetable/TreeTableSubMenu.vue
@@ -5,6 +5,7 @@
             <li><router-link to="/treetable/templating">&#9679; Templating</router-link></li>
             <li><router-link to="/treetable/paginator">&#9679; Paginator</router-link></li>
             <li><router-link to="/treetable/sort">&#9679; Sort</router-link></li>
+            <li><router-link to="/treetable/filter">&#9679; Filter</router-link></li>
         </ul>
     </div>    
 </template>