# all files / raven-node/lib/ utils.js

87.61% Statements 99/113
80.82% Branches 59/73
92.31% Functions 12/13
88.79% Lines 95/107

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     'use strict';

    var fs = require('fs');
    var url = require('url');
    var transports = require('./transports');
    var path = require('path');
    var lsmod = require('lsmod');
    var stacktrace = require('stack-trace');

    var ravenVersion = require('../package.json').version;

    var protocolMap = {
      http: 80,
      https: 443
    };

    var consoleAlerts = {};

    module.exports.disableConsoleAlerts = function disableConsoleAlerts() {
      consoleAlerts = false;
    };

    module.exports.consoleAlert = function consoleAlert(msg) {
      Iif (consoleAlerts && !(msg in consoleAlerts)) {
        consoleAlerts[msg] = true;
        console.log('raven@' + ravenVersion + ' alert: ' + msg);
      }
    };

    module.exports.extend = Object.assign || function (target) {
      for (var i = 1; i < arguments.length; i++) {
        var source = arguments[i];
        for (var key in source) {
          if (Object.prototype.hasOwnProperty.call(source, key)) {
            target[key] = source[key];
          }
        }
      }
      return target;
    };

    module.exports.getAuthHeader = function getAuthHeader(timestamp, apiKey, apiSecret) {
      var header = ['Sentry sentry_version=5'];
      header.push('sentry_timestamp=' + timestamp);
      header.push('sentry_client=raven-node/' + ravenVersion);
      header.push('sentry_key=' + apiKey);
      header.push('sentry_secret=' + apiSecret);
      return header.join(', ');
    };

    module.exports.parseDSN = function parseDSN(dsn) {
      if (!dsn) {
        // Let a falsey value return false explicitly
        return false;
      }
      try {
        var parsed = url.parse(dsn),
            response = {
              protocol: parsed.protocol.slice(0, -1),
              public_key: parsed.auth.split(':')[0],
              private_key: parsed.auth.split(':')[1],
              host: parsed.host.split(':')[0]
            };

        if (~response.protocol.indexOf('+')) {
          response.protocol = response.protocol.split('+')[1];
        }

        if (!transports.hasOwnProperty(response.protocol)) {
          throw new Error('Invalid transport');
        }

        var index = parsed.pathname.lastIndexOf('/');
        response.path = parsed.pathname.substr(0, index + 1);
        response.project_id = parsed.pathname.substr(index + 1);
        response.port = ~~parsed.port || protocolMap[response.protocol] || 443;
        return response;
      } catch (e) {
        throw new Error('Invalid Sentry DSN: ' + dsn);
      }
    };

    module.exports.getCulprit = function getCulprit(frame) {
      if (frame.module || frame.function) {
        return (frame.module || '?') + ' at ' + (frame.function || '?');
      }
      return '<unknown>';
    };

    var moduleCache;
    module.exports.getModules = function getModules() {
      if (!moduleCache) {
        moduleCache = lsmod();
      }
      return moduleCache;
    };

    var LINES_OF_CONTEXT = 7;

    function getFunction(line) {
      try {
        return line.getFunctionName() ||
          line.getTypeName() + '.' + (line.getMethodName() || '<anonymous>');
      } catch (e) {
        // This seems to happen sometimes when using 'use strict',
        // stemming from `getTypeName`.
        // [TypeError: Cannot read property 'constructor' of undefined]
        return '<anonymous>';
      }
    }

    var mainModule = (require.main && require.main.filename && path.dirname(require.main.filename) || process.cwd()) + '/';

    function getModule(filename, base) {
      if (!base) base = mainModule;

      // It's specifically a module
      var file = path.basename(filename, '.js');
      filename = path.dirname(filename);
      var n = filename.lastIndexOf('/node_modules/');
      if (n > -1) {
        // /node_modules/ is 14 chars
        return filename.substr(n + 14).replace(/\//g, '.') + ':' + file;
      }
      // Let's see if it's a part of the main module
      // To be a part of main module, it has to share the same base
      n = (filename + '/').lastIndexOf(base, 0);
      if (n === 0) {
        var module = filename.substr(base.length).replace(/\//g, '.');
        Eif (module) module += ':';
        module += file;
        return module;
      }
      return file;
    }

    function parseStack(err, cb) {
      var frames = [],
          cache = {};

      if (!err) {
        return cb(frames);
      }

      var stack = stacktrace.parse(err);

      // check to make sure that the stack is what we need it to be.
      if (!stack || !Array.isArray(stack) || !stack.length || !stack[0].getFileName) {
        // lol, stack is fucked
        return cb(frames);
      }

      var callbacks = stack.length;

      // Sentry requires the stack trace to be from oldest to newest
      stack.reverse();

      return stack.forEach(function (line, index) {
        var frame = {
              filename: line.getFileName() || '',
              lineno: line.getLineNumber(),
              colno: line.getColumnNumber(),
              'function': getFunction(line),
            },
            isInternal = line.isNative() ||
              frame.filename[0] !== '/' &&
              frame.filename[0] !== '.' &&
              frame.filename.indexOf(':\\') !== 1;

        // in_app is all that's not an internal Node function or a module within node_modules
        // note that isNative appears to return true even for node core libraries
        // see https://github.com/getsentry/raven-node/issues/176
        frame.in_app = !isInternal && frame.filename.indexOf('node_modules/') === -1;

        // Extract a module name based on the filename
        Eif (frame.filename) frame.module = getModule(frame.filename);

        // internal Node files are not full path names. Ignore them.
        if (isInternal) {
          frames[index] = frame;
          Iif (--callbacks === 0) cb(frames);
          return;
        }

        Iif (frame.filename in cache) {
          parseLines(cache[frame.filename]);
          if (--callbacks === 0) cb(frames);
          return;
        }

        fs.readFile(frame.filename, function (_err, file) {
          if (!_err) {
            file = file.toString().split('\n');
            cache[frame.filename] = file;
            parseLines(file, frame);
          }
          frames[index] = frame;
          if (--callbacks === 0) cb(frames);
        });

        function parseLines(lines) {
          frame.pre_context = lines.slice(Math.max(0, frame.lineno - (LINES_OF_CONTEXT + 1)), frame.lineno - 1);
          frame.context_line = lines[frame.lineno - 1];
          frame.post_context = lines.slice(frame.lineno, frame.lineno + LINES_OF_CONTEXT);
        }
      });
    }

    // expose basically for testing because I don't know what I'm doing
    module.exports.parseStack = parseStack;
    module.exports.getModule = getModule;