cli: pretty print existing Ethernet frame stats

Pretty print all Ethernet frame statistics from the operational
datastore. Only in the detailed interface view.

Signed-off-by: Richard Alpe <richard@bit42.se>

board/netconf/rootfs/lib/infix/cli-pretty

@@ -32,6 +32,16 @@ class Decore():
         return Decore.decorate("32", txt, "39")
 
 class Iface:
+    def get_json_data(self, default, *args):
+        data = self.data
+        for arg in args:
+            if data.get(arg):
+                data = data.get(arg)
+            else:
+                return default
+
+        return data
+
     def __init__(self, data):
         self.data = data
         self.name = data.get('name', '')
@@ -181,6 +191,13 @@ class Iface:
             print(f"{'in-octets':<{20}}: {self.in_octets}")
             print(f"{'out-octets':<{20}}: {self.out_octets}")
 
+        frame = self.get_json_data([], 'ieee802-ethernet-interface:ethernet',
+                                   'statistics', 'frame')
+        if frame:
+            print(f"")
+            for key, val in frame.items():
+                print(f"eth-{key:<{16}}: {val}")
+
 
 def find_iface(_ifaces, name):
     for _iface in [Iface(data) for data in _ifaces]:

test/case/cli_pretty/json/bloated.json

@@ -189,6 +189,29 @@
           ]
         }
       },
+      {
+        "TEST-DESCR": "Interface ieee802-ethernet-interface stats",
+        "name": "e13",
+        "type": "infix-if-type:ethernet",
+        "oper-status": "up",
+        "if-index": 4,
+        "phys-address": "02:ee:00:00:12:00",
+        "statistics": {
+          "in-octets": "11",
+          "out-octets": "22"
+        },
+        "ieee802-ethernet-interface:ethernet": {
+          "statistics": {
+            "frame": {
+              "in-frames": "1111",
+              "out-frames": "2222"
+            }
+          }
+        },
+        "ietf-ip:ipv4": {
+          "mtu": 1500
+        }
+      },
       {
         "TEST-DESCR": "Interface with VLAN on top",
         "name": "e20",