#!/usr/bin/env php
<?php

/*
 * Copyright 2012 Facebook, Inc.
 *
 * 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.
 */

$root = dirname(dirname(dirname(__FILE__)));
require_once $root.'/scripts/__init_script__.php';

$args = new PhutilArgumentParser($argv);
$args->setSynopsis(<<<EOSYNOPSIS
**import_project_symbols.php** [__options__] __project_name__ < symbols

  Import project symbols (symbols are read from stdin).
EOSYNOPSIS
  );
$args->parseStandardArguments();
$args->parse(
  array(
    array(
      'name'      => 'more',
      'wildcard'  => true,
    ),
  ));

$more = $args->getArg('more');
if (count($more) !== 1) {
  $args->printHelpAndExit();
}

$project_name = head($more);
$project = id(new PhabricatorRepositoryArcanistProject())->loadOneWhere(
  'name = %s',
  $project_name);

if (!$project) {
  // TODO: Provide a less silly way to do this explicitly, or just do it right
  // here.
  echo "Project '{$project_name}' is unknown. Upload a diff to implicitly ".
       "create it.\n";
  exit(1);
}

echo "Parsing input from stdin...\n";
$input = file_get_contents('php://stdin');
$input = trim($input);
$input = explode("\n", $input);

$symbols = array();
foreach ($input as $key => $line) {
  $line_no = $key + 1;
  $matches = null;
  $ok = preg_match(
    '/^((?P<context>[^ ]+)? )?(?P<name>[^ ]+) (?P<type>[^ ]+) '.
    '(?P<lang>[^ ]+) (?P<line>\d+) (?P<path>.*)$/',
    $line,
    $matches);
  if (!$ok) {
    throw new Exception(
      "Line #{$line_no} of input is invalid. Expected five or six ".
      "space-delimited fields: maybe symbol context, symbol name, symbol ".
      "type, symbol language, line number, path. ".
      "For example:\n\n".
      "idx function php 13 /path/to/some/file.php\n\n".
      "Actual line was:\n\n".
      "{$line}");
  }
  if (empty($matches['context'])) {
    $matches['context'] = '';
  }
  $context     = $matches['context'];
  $name        = $matches['name'];
  $type        = $matches['type'];
  $lang        = $matches['lang'];
  $line_number = $matches['line'];
  $path        = $matches['path'];

  if (strlen($context) > 128) {
    throw new Exception(
      "Symbol context '{$context}' defined on line #{$line_no} is too long, ".
      "maximum symbol context length is 128 characters.");
  }

  if (strlen($name) > 128) {
    throw new Exception(
      "Symbol name '{$name}' defined on line #{$line_no} is too long, maximum ".
      "symbol name length is 128 characters.");
  }

  if (strlen($type) > 12) {
    throw new Exception(
      "Symbol type '{$type}' defined on line #{$line_no} is too long, maximum ".
      "symbol type length is 12 characters.");
  }

  if (strlen($lang) > 32) {
    throw new Exception(
      "Symbol language '{$lang}' defined on line #{$line_no} is too long, ".
      "maximum symbol language length is 32 characters.");
  }

  if (!strlen($path) || $path[0] != 0) {
    throw new Exception(
      "Path '{$path}' defined on line #{$line_no} is invalid. Paths should be ".
      "begin with '/' and specify a path from the root of the project, like ".
      "'/src/utils/utils.php'.");
  }

  $symbols[] = array(
    'ctxt' => $context,
    'name' => $name,
    'type' => $type,
    'lang' => $lang,
    'line' => $line_number,
    'path' => $path,
  );
}

echo "Looking up path IDs...\n";
$path_map = PhabricatorRepositoryCommitChangeParserWorker::lookupOrCreatePaths(
  ipull($symbols, 'path'));

$symbol = new PhabricatorRepositorySymbol();
$conn_w = $symbol->establishConnection('w');

echo "Preparing queries...\n";
$sql = array();
foreach ($symbols as $dict) {
  $sql[] = qsprintf(
    $conn_w,
    '(%d, %s, %s, %s, %s, %d, %d)',
    $project->getID(),
    $dict['ctxt'],
    $dict['name'],
    $dict['type'],
    $dict['lang'],
    $dict['line'],
    $path_map[$dict['path']]);
}

echo "Purging old symbols...\n";
queryfx(
  $conn_w,
  'DELETE FROM %T WHERE arcanistProjectID = %d',
  $symbol->getTableName(),
  $project->getID());

echo "Loading ".number_format(count($sql))." symbols...\n";
foreach (array_chunk($sql, 128) as $chunk) {
  queryfx(
    $conn_w,
    'INSERT INTO %T
      (arcanistProjectID, symbolContext, symbolName, symbolType,
        symbolLanguage, lineNumber, pathID) VALUES %Q',
    $symbol->getTableName(),
    implode(', ', $chunk));
}

echo "Done.\n";