fix: get leaderboards using hooks
diff --git a/erpnext/hooks.py b/erpnext/hooks.py
index 7e33a14..b94c29d 100644
--- a/erpnext/hooks.py
+++ b/erpnext/hooks.py
@@ -42,6 +42,8 @@
 get_help_messages = "erpnext.utilities.activation.get_help_messages"
 get_user_progress_slides = "erpnext.utilities.user_progress.get_user_progress_slides"
 update_and_get_user_progress = "erpnext.utilities.user_progress_utils.update_default_domain_actions_and_get_state"
+leaderboards = "erpnext.startup.leaderboard.get_leaderboards"
+
 
 on_session_creation = "erpnext.shopping_cart.utils.set_cart_count"
 on_logout = "erpnext.shopping_cart.utils.clear_cart_count"
diff --git a/erpnext/startup/leaderboard.py b/erpnext/startup/leaderboard.py
new file mode 100644
index 0000000..a5549b8
--- /dev/null
+++ b/erpnext/startup/leaderboard.py
@@ -0,0 +1,128 @@
+
+from __future__ import unicode_literals, print_function
+import frappe
+
+def get_leaderboards():
+	leaderboards = {
+		'Customer': 'erpnext.startup.leaderboard.get_all_customers',
+		'Item': 'erpnext.startup.leaderboard.get_all_items',
+		'Supplier': 'erpnext.startup.leaderboard.get_all_suppliers',
+		'Sales Partner': 'erpnext.startup.leaderboard.get_all_sales_partner',
+		'Sales Person': 'erpnext.startup.leaderboard.get_all_sales_person',
+	}
+
+	return leaderboards
+
+def get_all_customers(from_date, company, field):
+	if field == "outstanding_amount":
+		return frappe.db.sql("""
+			select customer as name, sum(outstanding_amount) as value
+			FROM `tabSales Invoice`
+			where docstatus = 1 and posting_date >= %s and company = %s
+			group by customer
+			order by value DESC
+			limit 20
+		""", (from_date, company), as_dict=1)
+	else:
+		if field == "total_sales_amount":
+			select_field = "sum(so_item.base_net_amount)"
+		elif field == "total_qty_sold":
+			select_field = "sum(so_item.stock_qty)"
+
+		return frappe.db.sql("""
+			select so.customer as name, {0} as value
+			FROM `tabSales Order` as so JOIN `tabSales Order Item` as so_item
+				ON so.name = so_item.parent
+			where so.docstatus = 1 and so.transaction_date >= %s and so.company = %s
+			group by so.customer
+			order by value DESC
+			limit 20
+		""".format(select_field), (from_date, company), as_dict=1)
+
+def get_all_items(from_date, company, field):
+	if field in ("available_stock_qty", "available_stock_value"):
+		return frappe.db.sql("""
+			select item_code as name, {0} as value
+			from tabBin
+			group by item_code
+			order by value desc
+			limit 20
+		""".format("sum(actual_qty)" if field=="available_stock_qty" else "sum(stock_value)"), as_dict=1)
+	else:
+		if field == "total_sales_amount":
+			select_field = "sum(order_item.base_net_amount)"
+			select_doctype = "Sales Order"
+		elif field == "total_purchase_amount":
+			select_field = "sum(order_item.base_net_amount)"
+			select_doctype = "Purchase Order"
+		elif field == "total_qty_sold":
+			select_field = "sum(order_item.stock_qty)"
+			select_doctype = "Sales Order"
+		elif field == "total_qty_purchased":
+			select_field = "sum(order_item.stock_qty)"
+			select_doctype = "Purchase Order"
+
+		return frappe.db.sql("""
+			select order_item.item_code as name, {0} as value
+			from `tab{1}` sales_order join `tab{1} Item` as order_item
+				on sales_order.name = order_item.parent
+			where sales_order.docstatus = 1
+				and sales_order.company = %s and sales_order.transaction_date >= %s
+			group by order_item.item_code
+			order by value desc
+			limit 20
+		""".format(select_field, select_doctype), (company, from_date), as_dict=1)
+
+def get_all_suppliers(from_date, company, field):
+	if field == "outstanding_amount":
+		return frappe.db.sql("""
+			select supplier as name, sum(outstanding_amount) as value
+			FROM `tabPurchase Invoice`
+			where docstatus = 1 and posting_date >= %s and company = %s
+			group by supplier
+			order by value DESC
+			limit 20""", (from_date, company), as_dict=1)
+	else:
+		if field == "total_purchase_amount":
+			select_field = "sum(purchase_order_item.base_net_amount)"
+		elif field == "total_qty_purchased":
+			select_field = "sum(purchase_order_item.stock_qty)"
+
+		return frappe.db.sql("""
+			select purchase_order.supplier as name, {0} as value
+			FROM `tabPurchase Order` as purchase_order LEFT JOIN `tabPurchase Order Item`
+				as purchase_order_item ON purchase_order.name = purchase_order_item.parent
+			where purchase_order.docstatus = 1 and  purchase_order.modified >= %s
+				and  purchase_order.company = %s
+			group by purchase_order.supplier
+			order by value DESC
+			limit 20""".format(select_field), (from_date, company), as_dict=1)
+
+def get_all_sales_partner(from_date, company, field):
+	if field == "total_sales_amount":
+		select_field = "sum(base_net_total)"
+	elif field == "total_commission":
+		select_field = "sum(total_commission)"
+
+	return frappe.db.sql("""
+		select sales_partner as name, {0} as value
+		from `tabSales Order`
+		where ifnull(sales_partner, '') != '' and docstatus = 1
+			and transaction_date >= %s and company = %s
+		group by sales_partner
+		order by value DESC
+		limit 20
+	""".format(select_field), (from_date, company), as_dict=1)
+
+def get_all_sales_person(from_date, company, field = None):
+	return frappe.db.sql("""
+		select sales_team.sales_person as name, sum(sales_order.base_net_total) as value
+		from `tabSales Order` as sales_order join `tabSales Team` as sales_team
+			on sales_order.name = sales_team.parent and sales_team.parenttype = 'Sales Order'
+		where sales_order.docstatus = 1
+			and sales_order.transaction_date >= %s
+			and sales_order.company = %s
+		group by sales_team.sales_person
+		order by value DESC
+		limit 20
+	""", (from_date, company), as_dict=1)