Add nodes/full_types endpoint to REST API

The logic is mainly copied from aiida-core with slight adaptations to
resolve type checker errors.

aiida_restapi/identifiers.py

@@ -31,10 +31,16 @@
 
 """
 
-from typing import Any
+from __future__ import annotations
+
+from collections.abc import MutableMapping
+from typing import TYPE_CHECKING, Any, Iterator, Optional, Union
 
 from aiida.common.escaping import escape_for_sql_like
 
+if TYPE_CHECKING:
+    from aiida.engine.processes.ports import PortNamespace
+
 FULL_TYPE_CONCATENATOR = '|'
 LIKE_OPERATOR_CHARACTER = '%'
 DEFAULT_NAMESPACE_LABEL = '~no-entry-point~'
@@ -168,3 +174,279 @@ def load_entry_point_from_full_type(full_type: str) -> Any:
     # Which means it is most likely a full module path (the fallback option) and we cannot necessarily load the
     # class from this. We could try with `importlib` but not sure that we should
     raise EntryPointError('entry point of the given full type cannot be loaded')
+
+
+class Namespace(MutableMapping):
+    """Namespace that can be used to map the node class hierarchy."""
+
+    namespace_separator = '.'
+
+    # Very ugly ad-hoc mapping of `path` to `label` for the non-leaf entries in the nested `Namespace` mapping:
+    mapping_path_to_label: dict[Union[str, None], str] = {
+        'node': 'Node',
+        'node.data': 'Data',
+        'node.process': 'Process',
+        'node.process.calculation': 'Calculation',
+        'node.process.calculation.calcjob': 'Calculation job',
+        'node.process.calculation.calcfunction': 'Calculation function',
+        'node.process.workflow': 'Workflow',
+        'node.process.workflow.workchain': 'Work chain',
+        'node.process.workflow.workfunction': 'Work function',
+    }
+
+    # This is a hard-coded mapping to generate the correct full types for process node namespaces of external
+    # plugins. The `node_type` in that case is fixed and the `process_type` should start with the entry point group
+    # followed by the plugin name and the wildcard.
+
+    process_full_type_mapping = {
+        'process.calculation.calcjob.': 'process.calculation.calcjob.CalcJobNode.|aiida.calculations:{plugin_name}.%',
+        'process.calculation.calcfunction.': 'process.calculation.calcfunction.CalcFunctionNode.|aiida.calculations:{plugin_name}.%',  # noqa: E501
+        'process.workflow.workfunction.': 'process.workflow.workfunction.WorkFunctionNode.|aiida.workflows:{plugin_name}.%',  # noqa: E501
+        'process.workflow.workchain.': 'process.workflow.workchain.WorkChainNode.|aiida.workflows:{plugin_name}.%',
+    }
+
+    process_full_type_mapping_unplugged = {
+        'process.calculation.calcjob.': 'process.calculation.calcjob.CalcJobNode.|{plugin_name}.%',
+        'process.calculation.calcfunction.': 'process.calculation.calcfunction.CalcFunctionNode.|{plugin_name}.%',
+        'process.workflow.workfunction.': 'process.workflow.workfunction.WorkFunctionNode.|{plugin_name}.%',
+        'process.workflow.workchain.': 'process.workflow.workchain.WorkChainNode.|{plugin_name}.%',
+    }
+
+    def __str__(self) -> str:
+        import json
+
+        return json.dumps(self.get_description(), sort_keys=True, indent=4)
+
+    def __init__(
+        self,
+        namespace: str,
+        path: Optional[str] = None,
+        label: Optional[str] = None,
+        full_type: Optional[str] = None,
+        counter: Optional[int] = None,
+        is_leaf: bool = True,
+    ):
+        """Construct a new node class namespace."""
+        self._namespace = namespace
+        self._path = path if path is not None else namespace
+        self._full_type = self._infer_full_type(full_type)
+        self._subspaces: dict[str, PortNamespace] = {}
+        self._is_leaf = is_leaf
+        self._counter = counter
+
+        self._label: str
+        if label is not None:
+            self._label = label
+        else:
+            self._label = self.mapping_path_to_label.get(path, self._path.rpartition('.')[-1])
+
+        # Manual override for process subspaces that contain entries corresponding to nodes with "unregistered" process
+        # types. In this case, the label should become `Unregistered` and the full type set to `None` because we cannot
+        # query for all nodes that fall under this category.
+        if namespace == DEFAULT_NAMESPACE_LABEL:
+            self._label = 'Unregistered'
+            self._full_type = None
+
+    def _infer_full_type(self, full_type: Union[str, None]) -> Union[str, None]:
+        """Infer the full type based on the current namespace path and the given full type of the leaf."""
+        from aiida.common.utils import strip_prefix
+
+        if full_type or self._path is None:
+            return full_type
+
+        full_type_ = strip_prefix(self._path, 'node.')
+
+        if full_type_.startswith('process.'):
+            for basepath, full_type_template in self.process_full_type_mapping.items():
+                if full_type_.startswith(basepath):
+                    plugin_name = strip_prefix(full_type_, basepath)
+                    if plugin_name.startswith(DEFAULT_NAMESPACE_LABEL):
+                        temp_type_template = self.process_full_type_mapping_unplugged[basepath]
+                        plugin_name = strip_prefix(plugin_name, DEFAULT_NAMESPACE_LABEL + '.')
+                        full_type_ = temp_type_template.format(plugin_name=plugin_name)
+                    else:
+                        full_type_ = full_type_template.format(plugin_name=plugin_name)
+                    return full_type_
+
+        full_type_ += f'.{LIKE_OPERATOR_CHARACTER}{FULL_TYPE_CONCATENATOR}'
+
+        if full_type_.startswith('process.'):
+            full_type_ += LIKE_OPERATOR_CHARACTER
+
+        return full_type_
+
+    def __iter__(self) -> Iterator[PortNamespace]:
+        return self._subspaces.__iter__()
+
+    def __len__(self) -> int:
+        return len(self._subspaces)
+
+    def __delitem__(self, key: str) -> None:
+        del self._subspaces[key]
+
+    def __getitem__(self, key: str) -> PortNamespace:
+        return self._subspaces[key]
+
+    def __setitem__(self, key: str, port: PortNamespace) -> None:
+        self._subspaces[key] = port
+
+    @property
+    def is_leaf(self) -> bool:
+        return self._is_leaf
+
+    def get_description(self) -> dict:
+        """Return a dictionary with a description of the ports this namespace contains.
+
+        Nested PortNamespaces will be properly recursed and Ports will print their properties in a list
+
+        :returns: a dictionary of descriptions of the Ports contained within this PortNamespace
+        """
+        result: dict[str, Any] = {
+            'namespace': self._namespace,
+            'full_type': self._full_type,
+            'label': self._label,
+            'path': self._path,
+            'subspaces': [],
+        }
+
+        for _, port in self._subspaces.items():
+            subspace_result = port.get_description()
+            result['subspaces'].append(subspace_result)
+            if 'counter' in subspace_result:
+                if self._counter is None:
+                    self._counter = 0
+                self._counter = self._counter + subspace_result['counter']
+
+        if self._counter is not None:
+            result['counter'] = self._counter
+
+        return result
+
+    def create_namespace(self, name: str, **kwargs: Any) -> 'Namespace':
+        """Create and return a new `Namespace` in this `Namespace`.
+
+        If the name is namespaced, the sub `Namespaces` will be created recursively, except if one of the namespaces is
+        already occupied at any level by a Port in which case a ValueError will be thrown
+
+        :param name: name (potentially namespaced) of the port to create and return
+        :param kwargs: constructor arguments that will be used *only* for the construction of the terminal Namespace
+        :returns: Namespace
+        :raises: ValueError if any sub namespace is occupied by a non-Namespace port
+        """
+        if not isinstance(name, str):
+            raise ValueError(f'name has to be a string type, not {type(name)}')
+
+        if not name:
+            raise ValueError('name cannot be an empty string')
+
+        namespace = name.split(self.namespace_separator)
+        port_name = namespace.pop(0)
+
+        path = f'{self._path}{self.namespace_separator}{port_name}'
+
+        # If this is True, the (sub) port namespace does not yet exist, so we create it
+        if port_name not in self:
+            # If there still is a `namespace`, we create a sub namespace, *without* the constructor arguments
+            if namespace:
+                self[port_name] = self.__class__(port_name, path=path, is_leaf=False)
+
+            # Otherwise it is the terminal port and we construct *with* the keyword arugments
+            else:
+                kwargs['is_leaf'] = True
+                self[port_name] = self.__class__(port_name, path=path, **kwargs)
+
+        # The port does already exist: if it is a leaf and `namespace` is not empty, then the current leaf node is
+        # also a namespace itself, so create a namespace with the same name and put the leaf within itself
+        elif self[port_name].is_leaf and namespace:
+            clone = self[port_name]
+            self[port_name] = self.__class__(port_name, path=path, is_leaf=False)
+            self[port_name][port_name] = clone
+
+        # If the current existing port is not a leaf and we do not have remaining namespace, that means the current
+        # namespace is the "concrete" version of the namespace, so we add the leaf version to the namespace.
+        elif not self[port_name].is_leaf and not namespace:
+            kwargs['is_leaf'] = True
+            self[port_name][port_name] = self.__class__(port_name, path=f'{path}.{port_name}', **kwargs)
+
+        # If there is still `namespace` left, we create the next namespace
+        if namespace:
+            kwargs['is_leaf'] = True
+            return self[port_name].create_namespace(self.namespace_separator.join(namespace), **kwargs)
+
+        return self[port_name]
+
+
+def get_node_namespace(user_pk: Optional[int] = None, count_nodes: Optional[int] = False) -> 'Namespace':
+    """Return the full namespace of all available nodes in the current database.
+
+    :return: complete node `Namespace`
+    """
+    from aiida import orm
+    from aiida.plugins.entry_point import is_valid_entry_point_string, parse_entry_point_string
+
+    filters = {}
+    if user_pk is not None:
+        filters['user_id'] = user_pk
+
+    builder = orm.QueryBuilder().append(orm.Node, filters=filters, project=['node_type', 'process_type']).distinct()
+
+    # All None instances of process_type are turned into ''
+    unique_types = {(node_type, process_type if process_type else '') for node_type, process_type in builder.all()}
+
+    # First we create a flat list of all "leaf" node types.
+    namespaces = []
+
+    for node_type, process_type in unique_types:
+        label = None
+        counter = None
+        namespace = None
+
+        if process_type:
+            # Only process nodes
+            parts = node_type.rsplit('.', 2)
+            if is_valid_entry_point_string(process_type):
+                _, entry_point_name = parse_entry_point_string(process_type)
+                label = entry_point_name.rpartition('.')[-1]
+                namespace = '.'.join(parts[:-2] + [entry_point_name])
+            else:
+                label = process_type.rsplit('.', 1)[-1]
+                namespace = '.'.join(parts[:-2] + [DEFAULT_NAMESPACE_LABEL, process_type])
+
+        else:
+            # Data nodes and process nodes without process type (='' or =None)
+            parts = node_type.rsplit('.', 2)
+            try:
+                label = parts[-2]
+                namespace = '.'.join(parts[:-2])
+            except IndexError:
+                continue
+
+        if count_nodes:
+            builder = orm.QueryBuilder()
+            concat_filters = [{'node_type': {'==': node_type}}]
+
+            if node_type.startswith('process.'):
+                if process_type:
+                    concat_filters.append({'process_type': {'==': process_type}})
+                else:
+                    concat_filters.append({'process_type': {'or': [{'==': ''}, {'==': None}]}})
+
+            if user_pk:
+                concat_filters.append({'user_id': {'==': user_pk}})
+
+            if len(concat_filters) == 1:
+                builder.append(orm.Node, filters=concat_filters[0])
+            else:
+                builder.append(orm.Node, filters={'and': concat_filters})
+
+            counter = builder.count()
+
+        full_type = construct_full_type(node_type, process_type)
+        namespaces.append((namespace, label, full_type, counter))
+
+    node_namespace = Namespace('node')
+
+    for namespace, label, full_type, counter in sorted(namespaces, key=lambda x: x[0], reverse=False):
+        node_namespace.create_namespace(namespace, label=label, full_type=full_type, counter=counter)
+
+    return node_namespace

aiida_restapi/routers/nodes.py

@@ -15,6 +15,7 @@
 from pydantic import ValidationError
 
 from aiida_restapi import models, resources
+from aiida_restapi.identifiers import get_node_namespace
 
 from .auth import get_current_active_user
 
@@ -85,6 +86,13 @@ def stream() -> Generator[bytes, None, None]:
         )
 
 
+@router.get('/nodes/full_types', response_model=dict[str, Any])
+@with_dbenv()
+async def get_full_types() -> dict[str, Any]:
+    """Return full_types of the nodes"""
+    return get_node_namespace(user_pk=None, count_nodes=False).get_description()
+
+
 @router.get('/nodes/{nodes_id}', response_model=models.Node)
 @with_dbenv()
 async def read_node(nodes_id: int) -> Optional[models.Node]:

docs/source/user_guide/graphql.md

@@ -369,9 +369,7 @@ http://localhost:5000/api/v4/nodes?attributes=true&attributes_filter=pbc1
 http://localhost:5000/api/v4/nodes/full_types
 ```
 
-NOT YET SPECIFICALLY IMPLEMENTED
-(although this needs further investigation, because full types is basically not documented anywhere)
-
+Not implemented for GraphQL, please use the REST API for this use case.
 
 ```html
 http://localhost:5000/api/v4/nodes/download_formats