feat(fusion-sql): add support for Files API (personal and shared spaces)

singlestoredb/fusion/handler.py

@@ -74,6 +74,12 @@
     '<column>': '',
     '<catalog-name>': '',
     '<link-name>': '',
+    '<file-location>': r'''
+    file_location = { PERSONAL | SHARED }
+    ''',
+    '<file-type>': r'''
+    file_type = { FILE | FOLDER }
+    ''',
 }
 
 BUILTIN_DEFAULTS = {  # type: ignore

singlestoredb/fusion/handlers/files.py

@@ -0,0 +1,379 @@
+#!/usr/bin/env python3
+from typing import Any
+from typing import Dict
+from typing import Optional
+
+from .. import result
+from ..handler import SQLHandler
+from ..result import FusionSQLResult
+from .utils import dt_isoformat
+from .utils import get_file_space
+
+
+class ShowFilesHandler(SQLHandler):
+    """
+    SHOW <file-location> FILES
+        [ at_path ] [ <like> ]
+        [ <order-by> ]
+        [ <limit> ] [ recursive ] [ extended ];
+
+    # File path to list
+    at_path = AT '<path>'
+
+    # Should the listing be recursive?
+    recursive = RECURSIVE
+
+    # Should extended attributes be shown?
+    extended = EXTENDED
+
+    Description
+    -----------
+    Displays a list of files in a personal/shared space.
+
+    Arguments
+    ---------
+    * ``<file-location>``: The location of the file, it can
+      be either 'PERSONAL' or 'SHARED'.
+    * ``<path>``: A path in the personal/shared space.
+    * ``<pattern>``: A pattern similar to SQL LIKE clause.
+      Uses ``%`` as the wildcard character.
+
+    Remarks
+    -------
+    * Use the ``LIKE`` clause to specify a pattern and return only the
+      files that match the specified pattern.
+    * The ``LIMIT`` clause limits the number of results to the
+      specified number.
+    * Use the ``ORDER BY`` clause to sort the results by the specified
+      key. By default, the results are sorted in the ascending order.
+    * The ``AT PATH`` clause specifies the path in the personal/shared
+      space to list the files from.
+    * Use the ``RECURSIVE`` clause to list the files recursively.
+    * To return more information about the files, use the ``EXTENDED``
+      clause.
+
+    Examples
+    --------
+    The following commands list the files at a specific path::
+
+        SHOW PERSONAL FILES AT PATH "/data/";
+        SHOW SHARED FILES AT PATH "/data/";
+
+    The following commands list the files recursively with
+    additional information::
+
+        SHOW PERSONAL FILES RECURSIVE EXTENDED;
+        SHOW SHARED FILES RECURSIVE EXTENDED;
+
+    See Also
+    --------
+    * ``UPLOAD PERSONAL FILE``
+    * ``UPLOAD SHARED FILE``
+    * ``DOWNLOAD PERSONAL FILE``
+    * ``DOWNLOAD SHARED FILE``
+
+    """  # noqa: E501
+
+    def run(self, params: Dict[str, Any]) -> Optional[FusionSQLResult]:
+        file_space = get_file_space(params)
+
+        res = FusionSQLResult()
+        res.add_field('Name', result.STRING)
+
+        if params['extended']:
+            res.add_field('Type', result.STRING)
+            res.add_field('Size', result.INTEGER)
+            res.add_field('Writable', result.STRING)
+            res.add_field('CreatedAt', result.DATETIME)
+            res.add_field('LastModifiedAt', result.DATETIME)
+
+            files = []
+            for x in file_space.listdir(
+                params['at_path'] or '/',
+                recursive=params['recursive'],
+            ):
+                info = file_space.info(x)
+                files.append(
+                    tuple([
+                        x, info.type, info.size or 0, info.writable,
+                        dt_isoformat(info.created_at),
+                        dt_isoformat(info.last_modified_at),
+                    ]),
+                )
+            res.set_rows(files)
+
+        else:
+            res.set_rows([(x,) for x in file_space.listdir(
+                params['at_path'] or '/',
+                recursive=params['recursive'],
+            )])
+
+        if params['like']:
+            res = res.like(Name=params['like'])
+
+        return res.order_by(**params['order_by']).limit(params['limit'])
+
+
+ShowFilesHandler.register(overwrite=True)
+
+
+class UploadFileHandler(SQLHandler):
+    """
+    UPLOAD <file-location> FILE TO path
+        FROM local_path [ overwrite ];
+
+    # Path to file
+    path = '<path>'
+
+    # Path to local file
+    local_path = '<local-path>'
+
+    # Should an existing file be overwritten?
+    overwrite = OVERWRITE
+
+    Description
+    -----------
+    Uploads a file to a personal/shared space.
+
+    Arguments
+    ---------
+    * ``<file-location>``: The location of the file, it can
+      be either 'PERSONAL' or 'SHARED'.
+    * ``<path>``: The path in the personal/shared space where the file is uploaded.
+    * ``<local-path>``: The path to the file to upload in the local
+      directory.
+
+    Remarks
+    -------
+    * If the ``OVERWRITE`` clause is specified, any existing file at the
+      specified path in the personal/shared space is overwritten.
+
+    Examples
+    --------
+    The following commands upload a file to a personal/shared space and overwrite any
+    existing files at the specified path::
+
+        UPLOAD PERSONAL FILE TO '/data/stats.csv'
+            FROM '/tmp/user/stats.csv' OVERWRITE;
+        UPLOAD SHARED FILE TO '/data/stats.csv'
+            FROM '/tmp/user/stats.csv' OVERWRITE;
+
+    See Also
+    --------
+    * ``DOWNLOAD PERSONAL FILE``
+    * ``DOWNLOAD SHARED FILE``
+
+    """  # noqa: E501
+
+    def run(self, params: Dict[str, Any]) -> Optional[FusionSQLResult]:
+        file_space = get_file_space(params)
+        file_space.upload_file(
+            params['local_path'], params['path'],
+            overwrite=params['overwrite'],
+        )
+        return None
+
+
+UploadFileHandler.register(overwrite=True)
+
+
+class DownloadFileHandler(SQLHandler):
+    """
+    DOWNLOAD <file-location> FILE path
+        [ local_path ]
+        [ overwrite ]
+        [ encoding ];
+
+    # Path to file
+    path = '<path>'
+
+    # Path to local file
+    local_path = TO '<local-path>'
+
+    # Should an existing file be overwritten?
+    overwrite = OVERWRITE
+
+    # File encoding
+    encoding = ENCODING '<encoding>'
+
+    Description
+    -----------
+    Download a file from a personal/shared space.
+
+    Arguments
+    ---------
+    * ``<file-location>``: The location of the file, it can
+      be either 'PERSONAL' or 'SHARED'.
+    * ``<path>``: The path to the file to download in a personal/shared space.
+    * ``<encoding>``: The encoding to apply to the downloaded file.
+    * ``<local-path>``: Specifies the path in the local directory
+      where the file is downloaded.
+
+    Remarks
+    -------
+    * If the ``OVERWRITE`` clause is specified, any existing file at
+      the download location is overwritten.
+    * By default, files are downloaded in binary encoding. To view
+      the contents of the file on the standard output, use the
+      ``ENCODING`` clause and specify an encoding.
+    * If ``<local-path>`` is not specified, the file is displayed
+      on the standard output.
+
+    Examples
+    --------
+    The following commands display the contents of the file on the
+    standard output::
+
+        DOWNLOAD PERSONAL FILE '/data/stats.csv' ENCODING 'utf8';
+        DOWNLOAD SHARED FILE '/data/stats.csv' ENCODING 'utf8';
+
+    The following commands download a file to a specific location and
+    overwrites any existing file with the name ``stats.csv`` on the local storage::
+
+        DOWNLOAD PERSONAL FILE '/data/stats.csv'
+            TO '/tmp/data.csv' OVERWRITE;
+        DOWNLOAD SHARED FILE '/data/stats.csv'
+            TO '/tmp/data.csv' OVERWRITE;
+
+    See Also
+    --------
+    * ``UPLOAD PERSONAL FILE``
+    * ``UPLOAD SHARED FILE``
+
+    """  # noqa: E501
+
+    def run(self, params: Dict[str, Any]) -> Optional[FusionSQLResult]:
+        file_space = get_file_space(params)
+
+        out = file_space.download_file(
+            params['path'],
+            local_path=params['local_path'] or None,
+            overwrite=params['overwrite'],
+            encoding=params['encoding'] or None,
+        )
+
+        if not params['local_path']:
+            res = FusionSQLResult()
+            if params['encoding']:
+                res.add_field('Data', result.STRING)
+            else:
+                res.add_field('Data', result.BLOB)
+            res.set_rows([(out,)])
+            return res
+
+        return None
+
+
+DownloadFileHandler.register(overwrite=True)
+
+
+class DropHandler(SQLHandler):
+    """
+    DROP <file-location> <file-type> path
+        [ recursive ];
+
+    # Path to file
+    path = '<path>'
+
+    # Should folders be deleted recursively?
+    recursive = RECURSIVE
+
+    Description
+    -----------
+    Deletes a file/folder from a personal/shared space.
+
+    Arguments
+    ---------
+    * ``<file-location>``: The location of the file, it can
+      be either 'PERSONAL' or 'SHARED'.
+    * ``<file-type>``: The type of the file, it can
+      be either 'FILE' or 'FOLDER'.
+    * ``<path>``: The path to the file to delete in a personal/shared space.
+
+    Remarks
+    -------
+    * The ``RECURSIVE`` clause indicates that the specified folder
+      is deleted recursively.
+
+    Example
+    --------
+    The following commands delete a file/folder from a personal/shared space::
+
+        DROP PERSONAL FILE '/data/stats.csv';
+        DROP SHARED FILE '/data/stats.csv';
+        DROP PERSONAL FOLDER '/data/' RECURSIVE;
+        DROP SHARED FOLDER '/data/' RECURSIVE;
+
+    See Also
+    --------
+
+    """  # noqa: E501
+
+    def run(self, params: Dict[str, Any]) -> Optional[FusionSQLResult]:
+        file_space = get_file_space(params)
+
+        file_type = params['file_type']
+        if not file_type:
+            raise KeyError('file type was not specified')
+
+        file_type = file_type.lower()
+        if file_type not in ['file', 'folder']:
+            raise ValueError('file type must be either FILE or FOLDER')
+
+        if file_type == 'file':
+            file_space.remove(params['path'])
+        elif file_type == 'folder':
+            if params['recursive']:
+                file_space.removedirs(params['path'])
+            else:
+                file_space.rmdir(params['path'])
+
+        return None
+
+
+DropHandler.register(overwrite=True)
+
+
+class CreateFolderHandler(SQLHandler):
+    """
+    CREATE <file-location> FOLDER path
+        [ overwrite ];
+
+    # Path to folder
+    path = '<path>'
+
+    # Should an existing folder be overwritten?
+    overwrite = OVERWRITE
+
+    Description
+    -----------
+    Creates a new folder at the specified path in a personal/shared space.
+
+    Arguments
+    ---------
+    * ``<file-location>``: The location of the file, it can
+      be either 'PERSONAL' or 'SHARED'.
+    * ``<path>``: The path in a personal/shared space where the folder
+      is created. The path must end with a trailing slash (/).
+
+    Remarks
+    -------
+    * If the ``OVERWRITE`` clause is specified, any existing
+      folder at the specified path is overwritten.
+
+    Example
+    -------
+    The following command creates a folder in a personal/shared space::
+
+        CREATE PERSONAL FOLDER `/data/csv/`;
+        CREATE SHARED FOLDER `/data/csv/`;
+
+    """
+
+    def run(self, params: Dict[str, Any]) -> Optional[FusionSQLResult]:
+        file_space = get_file_space(params)
+        file_space.mkdir(params['path'], overwrite=params['overwrite'])
+        return None
+
+
+CreateFolderHandler.register(overwrite=True)