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nodejs/node_modules/cron-parser/lib/parser.js

@@ -0,0 +1,103 @@
+'use strict';
+
+var CronExpression = require('./expression');
+
+function CronParser() {}
+
+/**
+ * Parse crontab entry
+ *
+ * @private
+ * @param {String} entry Crontab file entry/line
+ */
+CronParser._parseEntry = function _parseEntry (entry) {
+  var atoms = entry.split(' ');
+
+  if (atoms.length === 6) {
+    return {
+      interval: CronExpression.parse(entry)
+    };
+  } else if (atoms.length > 6) {
+    return {
+      interval: CronExpression.parse(entry),
+      command: atoms.slice(6, atoms.length)
+    };
+  } else {
+    throw new Error('Invalid entry: ' + entry);
+  }
+};
+
+/**
+ * Wrapper for CronExpression.parser method
+ *
+ * @public
+ * @param {String} expression Input expression
+ * @param {Object} [options] Parsing options
+ * @return {Object}
+ */
+CronParser.parseExpression = function parseExpression (expression, options, callback) {
+  return CronExpression.parse(expression, options, callback);
+};
+
+/**
+ * Parse content string
+ *
+ * @public
+ * @param {String} data Crontab content
+ * @return {Object}
+ */
+CronParser.parseString = function parseString (data) {
+  var self = this;
+  var blocks = data.split('\n');
+
+  var response = {
+    variables: {},
+    expressions: [],
+    errors: {}
+  };
+
+  for (var i = 0, c = blocks.length; i < c; i++) {
+    var block = blocks[i];
+    var matches = null;
+    var entry = block.replace(/^\s+|\s+$/g, ''); // Remove surrounding spaces
+
+    if (entry.length > 0) {
+      if (entry.match(/^#/)) { // Comment
+        continue;
+      } else if ((matches = entry.match(/^(.*)=(.*)$/))) { // Variable
+        response.variables[matches[1]] = matches[2];
+      } else { // Expression?
+        var result = null;
+
+        try {
+          result = self._parseEntry('0 ' + entry);
+          response.expressions.push(result.interval);
+        } catch (err) {
+          response.errors[entry] = err;
+        }
+      }
+    }
+  }
+
+  return response;
+};
+
+/**
+ * Parse crontab file
+ *
+ * @public
+ * @param {String} filePath Path to file
+ * @param {Function} callback
+ */
+CronParser.parseFile = function parseFile (filePath, callback) {
+  require('fs').readFile(filePath, function(err, data) {
+    if (err) {
+      callback(err);
+      return;
+    }
+
+    return callback(null, CronParser.parseString(data.toString()));
+  });
+};
+
+module.exports = CronParser;