[IMP] awesome_dashboard: implement dashboard layout, memoized RPC, pie chart

- Added Customers button to open a kanban view with all the customers.
- Added Leads button to open dynamic action on `crm.lead` model with list and
  form view.
- Created a reusable DashboardItem card component with a configurable
  width based on its size prop, fetch statistics via RPC from
 `/awesome_dashboard/statistics`, and display multiple metric cards
 showing key monthly order stats.
- Implement and register an `awesome_dashboard.statistics` service
  that memoizes RPC calls to `/awesome_dashboard/statistics` for
  consistent cached results, then integrate it into the
  Dashboard component to load and display the statistics.
- Build a PieChart component that loads Chart.js in `onWillStart`,
  renders a canvas, and draws a pie chart of t-shirt sales per size
  from `/awesome_dashboard/statistics`, displaying it inside a DashboardItem.

Author: aarp-odoo

awesome_dashboard/static/src/dashboard.js

@@ -1,12 +1,103 @@
 /** @odoo-module **/
 
-import { Component } from "@odoo/owl";
+import { _t } from "@web/core/l10n/translation";
 import { registry } from "@web/core/registry";
 import { Layout } from "@web/search/layout";
+import { useService } from "@web/core/utils/hooks";
+import { DashboardItem } from "./dashboard_item/dashboard_item";
+import { PieChart } from "./pie_chart/pie_chart";
+import { Component, onWillStart, useState } from "@odoo/owl";
 
 class AwesomeDashboard extends Component {
     static template = "awesome_dashboard.AwesomeDashboard";
-    static components = { Layout };
+    static components = { Layout, DashboardItem, PieChart };
+
+    setup() {
+        this.action = useService("action");
+        this.statistics = useService("awesome_dashboard.statistics");
+        this.cards = useState([
+            {
+                id: 1,
+                size: 0,
+                title: "Number of new orders this month",
+                value: 0,
+            },
+            {
+                id: 2,
+                size: 0,
+                title: "Total amount of new order this month",
+                value: 0,
+            },
+            {
+                id: 3,
+                size: 0,
+                title: "Average amount of t-shirt by order this month",
+                value: 0,
+            },
+            {
+                id: 4,
+                size: 0,
+                title: "Number of cancelled orders this month",
+                value: 0,
+            },
+            {
+                id: 5,
+                size: 0,
+                title: "Average time for an order to go from 'new' to 'sent' or 'cancelled'",
+                value: 0,
+            }
+        ]);
+
+        onWillStart(async () => {
+            this.result = await this.statistics.loadStatistics();
+            this.cards = [
+                {
+                    id: 1,
+                    size: 2,
+                    title: "Number of new orders this month",
+                    value: this.result.nb_new_orders,
+                },
+                {
+                    id: 2,
+                    size: 2,
+                    title: "Total amount of new order this month",
+                    value: this.result.total_amount,
+                },
+                {
+                    id: 3,
+                    size: 2,
+                    title: "Average amount of t-shirt by order this month",
+                    value: this.result.average_quantity,
+                },
+                {
+                    id: 4,
+                    size: 2,
+                    title: "Number of cancelled orders this month",
+                    value: this.result.nb_cancelled_orders,
+                },
+                {
+                    id: 5,
+                    size: 2,
+                    title: "Average time for an order to go from 'new' to 'sent' or 'cancelled'",
+                    value: this.result.average_time,
+                }
+            ]
+        });
+    }
+
+    openCustomers() {
+        this.action.doAction("base.action_partner_form");
+    }
+    
+    openLeads() {
+        this.action.doAction({
+            type: 'ir.actions.act_window',
+            name: _t('Leads'),
+            target: 'current',
+            res_model: 'crm.lead',
+            views: [[false, 'kanban'], [false, 'list'], [false, 'form']], // [view_id, view_type]
+        });
+    }
 }
 
 registry.category("actions").add("awesome_dashboard.dashboard", AwesomeDashboard);

awesome_dashboard/static/src/dashboard.xml

@@ -2,7 +2,29 @@
 <templates xml:space="preserve">
 
     <t t-name="awesome_dashboard.AwesomeDashboard">
-        <Layout className="'o_dashboard h-100'"/>
+        <Layout display="{ controlPanel: {} }" className="'o_dashboard h-100'">
+            <t t-set-slot="layout-buttons">
+                <button type="button" class="btn btn-primary" t-on-click="openCustomers">Customers</button>
+                <button type="button" class="btn btn-primary" t-on-click="openLeads">Leads</button>
+            </t>
+
+            <div class="d-flex flex-wrap gap-3 m-3">
+                <div class="d-flex flex-wrap gap-3">
+                    <t t-foreach="cards" t-as="card" t-key="card.id">
+                        <DashboardItem size="card.size">
+                            <p class="mb-0" style="text-align: left;" t-esc="card.title"/>
+                            <t t-set-slot="value">
+                                <t t-esc="card.value"/>
+                            </t>
+                        </DashboardItem>
+                    </t>
+                </div>
+                <DashboardItem size="2">
+                    <p class="mb-0 text-center">T-Shirt orders by size</p>
+                    <PieChart tshirtSales="this.result.orders_by_size"/>
+                </DashboardItem>
+            </div>
+        </Layout>
     </t>
 
 </templates>

awesome_dashboard/static/src/dashboard_item/dashboard_item.js

@@ -0,0 +1,21 @@
+/** @odoo-module **/
+
+import { Component } from "@odoo/owl";
+
+export class DashboardItem extends Component {
+    static template = "awesome_dashboard.DashboardItem";
+    static props = {
+        size: {
+            type: Number,
+            optional: true,
+        },
+        slots: {
+            type: Object,
+        }
+    }
+
+    setup() {
+        const size = this.props.size || 1;
+        this.width = 18*size;
+    }
+}

awesome_dashboard/static/src/dashboard_item/dashboard_item.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<templates xml:space="preserve">
+    <t t-name="awesome_dashboard.DashboardItem">
+        <div class="card align-items-center" t-att-style="`width: ${this.width}rem`">
+            <div class="card-body">
+                <t t-slot="default"/>
+                <h1 class="text-center text-sucess" style="color: green;">
+                    <t t-slot="value"/>
+                </h1>
+            </div>
+        </div>
+    </t>
+</templates>

awesome_dashboard/static/src/pie_chart/pie_chart.js

@@ -0,0 +1,50 @@
+/** @odoo-module **/
+
+import { Component, onWillStart, useRef, useEffect } from "@odoo/owl";
+import { loadJS } from '@web/core/assets';
+
+export class PieChart extends Component {
+    static template = "awesome_dashboard.PieChart";
+    
+    static props = {
+        tshirtSales: {
+            type: Object,
+        }
+    }
+
+    setup() {
+        this.canvasRef = useRef("canvas");
+        onWillStart(async () => {
+            await loadJS("/web/static/lib/Chart/Chart.js")
+        });
+
+        useEffect(() => {
+            this.createChart();
+            return () => this.chart?.destroy();
+        }, () => []);
+    }
+
+    getChartConfig() {
+        if (!this.props.tshirtSales) return {};
+        return {
+            type: 'pie',
+            data: {
+                labels: Object.keys(this.props.tshirtSales),
+                datasets: [{
+                    data: Object.values(this.props.tshirtSales),
+                }]
+            },
+            options: {
+                aspectRatio: 2,
+            }
+        }
+    }
+
+    createChart() {
+        if (this.chart) {
+            this.chart.destroy();
+        }
+        const config = this.getChartConfig();
+        this.chart = new Chart(this.canvasRef.el, config);
+    }
+}

awesome_dashboard/static/src/pie_chart/pie_chart.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<templates xml:space="preserve">
+    <t t-name="awesome_dashboard.PieChart">
+        <canvas height="500" width="500" t-ref="canvas"/>
+    </t>
+</templates>

awesome_dashboard/static/src/statistics_service.js

@@ -0,0 +1,20 @@
+/** @odoo-module **/
+
+import { registry } from "@web/core/registry";
+import { rpc } from "@web/core/network/rpc";
+import { memoize } from "@web/core/utils/functions";
+
+const loadStatistics = async() => {
+    const result = await rpc("/awesome_dashboard/statistics");
+    return result;
+}
+
+export const loadStatService = {
+    start () {
+        return {
+            loadStatistics: memoize(loadStatistics)
+        }
+    }
+}
+
+registry.category("services").add("awesome_dashboard.statistics", loadStatService);