update roadmap, fix perioddata block writing

docs/dev/map.md

@@ -4,12 +4,11 @@
 
 Showcase a limited set of core functionality, such as:
 
-- the v2 DFN specification schema and format
 - object model, data model, user-facing APIs
 - IO framework and ASCII file loading/writing
 - constructing, running, modifying simulations
 
-Design and implementation are provisional. Implementation may take shortcuts, e.g. components hand-written instead of generated from the DFN specification.
+Design and implementation are provisional. Implementation may take shortcuts, e.g. components hand-written instead of generated from the DFN specification. Demonstration is a guided tour with guardrails.
 
 Release to demo participants via `pip install` from github URL.
 

flopy4/mf6/converter/unstructure.py

@@ -156,8 +156,7 @@ def unstructure_component(value: Component) -> dict[str, Any]:
                             field_value,
                             structured_grid_dims=value.parent.data.dims,  # type: ignore
                         )
-                    if "period" in block_name:
-                        period_block_name = block_name
+                    if block_name == "period":
                         period_data[field_name] = {
                             kper: field_value.isel(nper=kper)
                             for kper in range(field_value.sizes["nper"])
@@ -177,16 +176,20 @@ def unstructure_component(value: Component) -> dict[str, Any]:
 
         # setup indexed period blocks, combine arrays into datasets
         for kper, block in period_blocks.items():
-            assert isinstance(period_block_name, str)
-            blocks[f"{period_block_name} {kper + 1}"] = {
-                period_block_name: xr.Dataset(block, coords=block[arr_name].coords)
+            blocks[f"period {kper + 1}"] = {
+                "period": xr.Dataset(block, coords=block[arr_name].coords)
             }
 
+        # combine "perioddata" block arrays (tdis, ats) into datasets
+        # so they render as lists. temp hack TODO do this generically
+        if perioddata := blocks.get("perioddata", None):
+            blocks["perioddata"] = {"perioddata": xr.Dataset(perioddata)}
+
     # total temporary hack! manually set solutiongroup 1.
     # TODO still need to support multiple..
     if "solutiongroup" in blocks:
         sg = blocks["solutiongroup"]
         blocks["solutiongroup 1"] = sg
         del blocks["solutiongroup"]
 
-    return {name: block for name, block in blocks.items() if name != period_block_name}
+    return {name: block for name, block in blocks.items() if name != "period"}

test/test_mf6_codec.py

@@ -130,12 +130,10 @@ def test_dumps_tdis():
     print("TDIS dump:")
     print(dumped)
     assert dumped
-    assert "BEGIN PERIODDATA 1" in dumped
+    assert "BEGIN PERIODDATA" in dumped
     assert " 1.0 1 1.0" in dumped
-    assert "END PERIODDATA 1" in dumped
-    assert "BEGIN PERIODDATA 2" in dumped
     assert " 2.0 2 1.0" in dumped
-    assert "END PERIODDATA 2" in dumped
+    assert "END PERIODDATA" in dumped
 
     loaded = loads(dumped)
     print("TDIS load:")