(core) Remove dead code for fetching snapshots

Summary: Deletes code which was previously only used by SharedSharing.ts, which was deleted in D2894

Test Plan: no

Reviewers: paulfitz

Reviewed By: paulfitz

Differential Revision: https://phab.getgrist.com/D2960

app/server/lib/ActiveDoc.ts

@@ -1049,11 +1049,6 @@ export class ActiveDoc extends EventEmitter {
     return sandboxActionBundle;
   }
 
-  public async fetchSnapshot() {
-    await this.waitForInitialization();
-    return this._pyCall('fetch_snapshot');
-  }
-
   // Needed for test/server/migrations.js tests
   public async testGetVersionFromDataEngine() {
     return this._pyCall('get_version');

sandbox/grist/engine.py

@@ -69,13 +69,6 @@ class OrderError(Exception):
 # An item of work to be done by Engine._update
 WorkItem = namedtuple('WorkItem', ('node', 'row_ids', 'locks'))
 
-# Returns an AddTable action which can be used to reproduce the given docmodel table
-def _get_table_actions(table):
-  schema_cols = [schema.make_column(c.colId, c.type, formula=c.formula, isFormula=c.isFormula)
-                 for c in table.columns]
-  return actions.AddTable(table.tableId, schema_cols)
-
-
 # skip private members, and methods we don't want to expose to users.
 skipped_completions = re.compile(r'\.(_|lookupOrAddDerived|getSummarySourceGroup)')
 
@@ -356,34 +349,6 @@ class Engine(object):
     return {table_id: self.fetch_table(table_id, formulas=formulas)
             for table_id in self.tables if table_id.startswith('_grist_')}
 
-  def fetch_snapshot(self):
-    """
-    Returns a full list of actions which when applied sequentially recreate the doc database to
-    its current state.
-    """
-    action_group = action_obj.ActionGroup()
-    action_group.stored = self._get_snapshot_actions()
-    return action_group
-
-  def _get_snapshot_actions(self):
-    """
-    Returns a list of action objects which recreate the document database when applied.
-    """
-    schema_actions = schema.schema_create_actions()
-    table_actions = [_get_table_actions(table) for table in self.docmodel.tables.all]
-    record_actions = [
-      self._get_record_actions(table_id)
-      for (table_id,t) in six.iteritems(self.tables)
-      if t.next_row_id() > 1
-    ]
-    return schema_actions + table_actions + record_actions
-
-  # Returns a BulkAddRecord action which can be used to add the currently existing data to an empty
-  # version of the table with the given table_id.
-  def _get_record_actions(self, table_id):
-    table_data = self.fetch_table(table_id, formulas=False)
-    return actions.BulkAddRecord(table_id, table_data.row_ids, table_data.columns)
-
   def find_col_from_values(self, values, n, opt_table_id=None):
     """
     Returns a list of colRefs for columns whose values match a given list. The results are ordered

sandbox/grist/main.py

@@ -67,11 +67,6 @@ def run(sandbox):
   def fetch_table_schema():
     return eng.fetch_table_schema()
 
-  @export
-  def fetch_snapshot():
-    action_group = eng.fetch_snapshot()
-    return eng.acl_split(action_group).to_json_obj()
-
   @export
   def autocomplete(txt, table_id, column_id, user):
     return eng.autocomplete(txt, table_id, column_id, user)