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/**
* @license Apache-2.0
*
* Copyright (c) 2019 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
'use strict';
// MODULES //
var logger = require( 'debug' );
var parse = require( 'acorn-loose' ).parse;
var startsWith = require( '@stdlib/string/starts-with' );
var workspaceAliasArgs = require( './workspace_alias_args.js' );
// VARIABLES //
var debug = logger( 'repl:completer:workspace' );
var AOPTS = {
'ecmaVersion': 'latest'
};
// MAIN //
/**
* Completes a workspace API expression.
*
* @private
* @param {Array} out - output array for storing completions
* @param {REPL} repl - REPL instance
* @param {string} expression - expression to complete
* @param {string} alias - workspace API alias
* @param {string} value - value to complete
* @returns {string} value filter
*/
function complete( out, repl, expression, alias, value ) {
var args;
var ast;
var arg;
var ws;
var w;
var i;
// Get the list of argument types for the desired workspace API:
debug( 'Workspace API: %s', alias );
args = workspaceAliasArgs( alias );
// Parse the expression into an AST:
debug( 'Expression: %s', expression );
ast = parse( expression, AOPTS );
// Check whether the argument which triggered TAB completion has a corresponding argument type which is completable:
debug( 'Checking if argument is completable...' );
arg = args[ ast.body[ 0 ].expression.arguments.length-1 ];
if ( !arg ) {
debug( 'Argument which triggered TAB completion is not completable.' );
return '';
}
debug( 'Argument is completable.' );
debug( 'Fetching list of workspaces...' );
ws = repl._context.workspaces(); // eslint-disable-line no-underscore-dangle
debug( 'Searching for completion candidates...' );
for ( i = 0; i < ws.length; i++ ) {
w = ws[ i ];
if ( startsWith( w, value ) ) {
debug( 'Found a completion: %s', w );
out.push( w );
} else {
debug( '%s does not match filter %s. Skipping...', w, value );
}
}
return value;
}
// EXPORTS //
module.exports = complete;
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