get rid of porg dependency, use orgparse directly

my/core/orgmode.py

@@ -2,8 +2,6 @@
 Various helpers for reading org-mode data
 """
 from datetime import datetime
-
-
 def parse_org_datetime(s: str) -> datetime:
     s = s.strip('[]')
     for fmt, cl in [
@@ -19,3 +17,36 @@ def parse_org_datetime(s: str) -> datetime:
             continue
     else:
         raise RuntimeError(f"Bad datetime string {s}")
+
+
+from orgparse import OrgNode
+from typing import Iterable, TypeVar, Callable
+V = TypeVar('V')
+
+def collect(n: OrgNode, cfun: Callable[[OrgNode], Iterable[V]]) -> Iterable[V]:
+    yield from cfun(n)
+    for c in n.children:
+        yield from collect(c, cfun)
+
+from more_itertools import one
+from orgparse.extra import Table
+def one_table(o: OrgNode) -> Table:
+    return one(collect(o, lambda n: (x for x in n.body_rich if isinstance(x, Table))))
+
+
+from typing import Iterator, Dict, Any
+class TypedTable(Table):
+    def __new__(cls, orig: Table) -> 'TypedTable':
+        tt = super().__new__(TypedTable)
+        tt.__dict__ = orig.__dict__
+        blocks = list(orig.blocks)
+        header = blocks[0] # fist block is schema
+        if len(header) == 2:
+            # TODO later interpret first line as types
+            header = header[1:]
+        tt._blocks = [header, *blocks[1:]]
+        return tt
+
+    @property
+    def blocks(self):
+        return getattr(self, '_blocks')