Change `ledger` CLI to use new `open_brokerd_dialog()`

Instead of effectively (and poorly) duplicating the trade dialog setup
logic, just use the new helper we exposed in the EMS module B)
Also, handle paper accounts that have no ledger / positions existing.

piker/accounting/cli.py

@@ -19,8 +19,9 @@ CLI front end for trades ledger and position tracking management.
 
 '''
 from typing import (
-    Any,
+    AsyncContextManager,
 )
+from types import ModuleType
 
 from rich.console import Console
 from rich.markdown import Markdown
@@ -45,7 +46,11 @@ def broker_init(
 
     **start_actor_kwargs,
 
-) -> dict:
+) -> tuple[
+    ModuleType,
+    dict,
+    AsyncContextManager,
+]:
     '''
     Given an input broker name, load all named arguments
     which can be passed to a daemon + context spawn for
@@ -83,13 +88,9 @@ def broker_init(
     from ..brokers._daemon import _setup_persistent_brokerd
 
     return (
-        start_actor_kwargs,  # to `ActorNursery.start_actor()`
-        _setup_persistent_brokerd,  # service task ep
-        getattr(  # trades endpoint
         brokermod,
-            'trades_dialogue',
-            None,
-        ),
+        start_actor_kwargs,  # to `ActorNursery.start_actor()`
+        _setup_persistent_brokerd,  # deamon service task ep
     )
 
 
@@ -119,10 +120,11 @@ def sync(
         console.print(md)
         return
 
-    start_kwargs, _, trades_ep = broker_init(
+    brokermod, start_kwargs, deamon_ep = broker_init(
         brokername,
         loglevel=loglevel,
     )
+    brokername: str = brokermod.name
 
     async def main():
 
@@ -136,6 +138,7 @@ def sync(
 
             tractor.open_nursery() as an,
         ):
+            try:
                 log.info(
                     f'Piker runtime up as {actor.uid}@{sockaddr}'
                 )
@@ -146,42 +149,53 @@ def sync(
                     **start_kwargs,
                 )
 
-            if (
-                brokername == 'paper'
-                or trades_ep is None
-            ):
-                from ..clearing import _paper_engine as paper
-                open_trades_endpoint = paper.open_paperboi(
-                    fqme=None,  # tell paper to not start clearing loop
-                    broker=brokername,
-                    loglevel=loglevel,
-                )
-            else:
-                # open live brokerd trades endpoint
-                open_trades_endpoint = portal.open_context(
-                    trades_ep,
-                    loglevel=loglevel,
+                from ..clearing import (
+                    open_brokerd_dialog,
                 )
+                brokerd_stream: tractor.MsgStream
 
-            positions: dict[str, Any]
-            accounts: list[str]
-            async with (
-                open_trades_endpoint as (
-                    brokerd_ctx,
-                    (positions, accounts),
+                async with open_brokerd_dialog(
+                    brokermod,
+                    portal,
+                    exec_mode=(
+                        'paper' if account == 'paper'
+                        else 'live'
                     ),
+                    loglevel=loglevel,
+                ) as (
+                    brokerd_stream,
+                    pp_msg_table,
+                    accounts,
                 ):
+                    try:
                         assert len(accounts) == 1
+                        if (
+                            not pp_msg_table
+                            and account == 'paper'
+                        ):
+                            console.print(
+                                '[yellow underline]'
+                                f'No pps found for `{brokername}.paper` account!\n'
+                                'Do you even have any paper ledger files?'
+                            )
+                            return
+
+                        pps_by_symbol: dict[str, BrokerdPosition] = pp_msg_table[
+                            brokername,
+                            account,
+                        ]
+
                         summary: str = (
                             '[dim underline]Piker Position Summary[/] '
                             f'[dim blue underline]{brokername}[/]'
                             '[dim].[/]'
                             f'[blue underline]{account}[/]'
                             f'[dim underline] -> total pps: [/]'
-                    f'[green]{len(positions)}[/]\n'
+                            f'[green]{len(pps_by_symbol)}[/]\n'
                         )
-                for ppdict in positions:
-                    ppmsg = BrokerdPosition(**ppdict)
+                        # for ppdict in positions:
+                        for fqme, ppmsg in pps_by_symbol.items():
+                            # ppmsg = BrokerdPosition(**ppdict)
                             size = ppmsg.size
                             if size:
                                 ppu: float = round(
@@ -217,14 +231,18 @@ def sync(
 
                         console.print(summary)
 
+                    finally:
                         # exit via ctx cancellation.
+                        brokerd_ctx: tractor.Context = brokerd_stream._ctx
                         await brokerd_ctx.cancel(timeout=1)
+
                     # TODO: once ported to newer tractor branch we should
                     # be able to do a loop like this:
                     # while brokerd_ctx.cancel_called_remote is None:
                     #     await trio.sleep(0.01)
                     #     await brokerd_ctx.cancel()
 
+            finally:
                 await portal.cancel_actor()
 
     trio.run(main)