import actions import schema import logger from usertypes import strict_equal log = logger.Logger(__name__, logger.INFO) class DocActions(object): def __init__(self, engine): self._engine = engine #---------------------------------------- # Actions on records. #---------------------------------------- def AddRecord(self, table_id, row_id, column_values): self.BulkAddRecord( table_id, [row_id], {key: [val] for key, val in column_values.iteritems()}) def BulkAddRecord(self, table_id, row_ids, column_values): table = self._engine.tables[table_id] for row_id in row_ids: assert row_id not in table.row_ids, \ "docactions.[Bulk]AddRecord for existing record #%s" % row_id self._engine.out_actions.undo.append(actions.BulkRemoveRecord(table_id, row_ids).simplify()) self._engine.add_records(table_id, row_ids, column_values) def RemoveRecord(self, table_id, row_id): return self.BulkRemoveRecord(table_id, [row_id]) def BulkRemoveRecord(self, table_id, row_ids): table = self._engine.tables[table_id] # Collect the undo values, and unset all values in the column (i.e. set to defaults), just to # make sure we don't have stale values hanging around. undo_values = {} for column in table.all_columns.itervalues(): if not column.is_formula() and column.col_id != "id": col_values = map(column.raw_get, row_ids) default = column.getdefault() # If this column had all default values, don't include it into the undo BulkAddRecord. if not all(strict_equal(val, default) for val in col_values): undo_values[column.col_id] = col_values for row_id in row_ids: column.unset(row_id) # Generate the undo action. self._engine.out_actions.undo.append( actions.BulkAddRecord(table_id, row_ids, undo_values).simplify()) # Invalidate the deleted rows, so that anything that depends on them gets recomputed. self._engine.invalidate_records(table_id, row_ids) def UpdateRecord(self, table_id, row_id, columns): self.BulkUpdateRecord( table_id, [row_id], {key: [val] for key, val in columns.iteritems()}) def BulkUpdateRecord(self, table_id, row_ids, columns): table = self._engine.tables[table_id] for row_id in row_ids: assert row_id in table.row_ids, \ "docactions.[Bulk]UpdateRecord for non-existent record #%s" % row_id # Load the updated values. undo_values = {} for col_id, values in columns.iteritems(): col = table.get_column(col_id) undo_values[col_id] = map(col.raw_get, row_ids) for (row_id, value) in zip(row_ids, values): col.set(row_id, value) # Generate the undo action. self._engine.out_actions.undo.append( actions.BulkUpdateRecord(table_id, row_ids, undo_values).simplify()) # Invalidate the updated rows, just for the columns that got changed (and, as always, # anything that depends on them). self._engine.invalidate_records(table_id, row_ids, col_ids=columns.keys()) def ReplaceTableData(self, table_id, row_ids, column_values): old_data = self._engine.fetch_table(table_id, formulas=False) self._engine.out_actions.undo.append(actions.ReplaceTableData(*old_data)) self._engine.load_table(actions.TableData(table_id, row_ids, column_values)) #---------------------------------------- # Actions on columns. #---------------------------------------- def AddColumn(self, table_id, col_id, col_info): table = self._engine.tables[table_id] assert not table.has_column(col_id), "Column %s already exists in %s" % (col_id, table_id) # Add the new column to the schema object maintained in the engine. self._engine.schema[table_id].columns[col_id] = schema.dict_to_col(col_info, col_id=col_id) self._engine.rebuild_usercode() self._engine.new_column_name(table) # Generate the undo action. self._engine.out_actions.undo.append(actions.RemoveColumn(table_id, col_id)) def RemoveColumn(self, table_id, col_id): table = self._engine.tables[table_id] assert table.has_column(col_id), "Column %s not in table %s" % (col_id, table_id) # Generate (if needed) the undo action to restore the data. undo_action = None column = table.get_column(col_id) if not column.is_formula(): default = column.getdefault() # Add to undo a BulkUpdateRecord for non-default values in the column being removed. row_ids = [r for r in table.row_ids if not strict_equal(column.raw_get(r), default)] undo_action = actions.BulkUpdateRecord(table_id, row_ids, { column.col_id: map(column.raw_get, row_ids) }).simplify() # Remove the specified column from the schema object. colinfo = self._engine.schema[table_id].columns.pop(col_id) self._engine.rebuild_usercode() # Generate the undo action(s). if undo_action: self._engine.out_actions.undo.append(undo_action) self._engine.out_actions.undo.append(actions.AddColumn( table_id, col_id, schema.col_to_dict(colinfo, include_id=False))) def RenameColumn(self, table_id, old_col_id, new_col_id): table = self._engine.tables[table_id] assert table.has_column(old_col_id), "Column %s not in table %s" % (old_col_id, table_id) assert not table.has_column(new_col_id), \ "Column %s already exists in %s" % (new_col_id, table_id) old_column = table.get_column(old_col_id) # Replace the renamed column in the schema object. schema_table_info = self._engine.schema[table_id] colinfo = schema_table_info.columns.pop(old_col_id) schema_table_info.columns[new_col_id] = schema.SchemaColumn( new_col_id, colinfo.type, colinfo.isFormula, colinfo.formula) self._engine.rebuild_usercode() self._engine.new_column_name(table) # We replaced the old column with a new Column object (not strictly necessary, but simpler). # For a raw data column, we need to copy over the data from the old column object. new_column = table.get_column(new_col_id) new_column.copy_from_column(old_column) # Generate the undo action. self._engine.out_actions.undo.append(actions.RenameColumn(table_id, new_col_id, old_col_id)) def ModifyColumn(self, table_id, col_id, col_info): table = self._engine.tables[table_id] assert table.has_column(col_id), "Column %s not in table %s" % (col_id, table_id) old_column = table.get_column(col_id) # Modify the specified column in the schema object. schema_table_info = self._engine.schema[table_id] old = schema_table_info.columns[col_id] new = schema.SchemaColumn(col_id, col_info.get('type', old.type), bool(col_info.get('isFormula', old.isFormula)), col_info.get('formula', old.formula)) if new == old: log.info("ModifyColumn called which was a noop") return undo_col_info = {k: v for k, v in schema.col_to_dict(old, include_id=False).iteritems() if k in col_info} # Remove the column from the schema, then re-add it, to force creation of a new column object. schema_table_info.columns.pop(col_id) self._engine.rebuild_usercode() schema_table_info.columns[col_id] = new self._engine.rebuild_usercode() # Fill in the new column with the values from the old column. new_column = table.get_column(col_id) for row_id in table.row_ids: new_column.set(row_id, old_column.raw_get(row_id)) # Generate the undo action. self._engine.out_actions.undo.append(actions.ModifyColumn(table_id, col_id, undo_col_info)) #---------------------------------------- # Actions on tables. #---------------------------------------- def AddTable(self, table_id, columns): assert table_id not in self._engine.tables, "Table %s already exists" % table_id # Update schema, and re-generate the module code. self._engine.schema[table_id] = schema.SchemaTable(table_id, schema.dict_list_to_cols(columns)) self._engine.rebuild_usercode() # Generate the undo action. self._engine.out_actions.undo.append(actions.RemoveTable(table_id)) def RemoveTable(self, table_id): assert table_id in self._engine.tables, "Table %s doesn't exist" % table_id # Create undo actions to restore all the data records of this table. table_data = self._engine.fetch_table(table_id, formulas=False) undo_action = actions.BulkAddRecord(*table_data).simplify() if undo_action: self._engine.out_actions.undo.append(undo_action) # Update schema, and re-generate the module code. schema_table = self._engine.schema.pop(table_id) self._engine.rebuild_usercode() # Generate the undo action. self._engine.out_actions.undo.append(actions.AddTable( table_id, schema.cols_to_dict_list(schema_table.columns))) def RenameTable(self, old_table_id, new_table_id): assert old_table_id in self._engine.tables, "Table %s doesn't exist" % old_table_id assert new_table_id not in self._engine.tables, "Table %s already exists" % new_table_id old_table = self._engine.tables[old_table_id] # Update schema, and re-generate the module code. old = self._engine.schema.pop(old_table_id) self._engine.schema[new_table_id] = schema.SchemaTable(new_table_id, old.columns) self._engine.rebuild_usercode() # Copy over all columns from the old table to the new. new_table = self._engine.tables[new_table_id] for new_column in new_table.all_columns.itervalues(): if not new_column.is_formula(): new_column.copy_from_column(old_table.get_column(new_column.col_id)) new_table.grow_to_max() # We need to bring formula columns to the right size too. # Generate the undo action. self._engine.out_actions.undo.append(actions.RenameTable(new_table_id, old_table_id)) # end