Refactored all device list components to its own module.

res/app/device-list/util/query-parser/index.js

@@ -0,0 +1,123 @@
+var State = {
+  TERM_START: 10
+, QUERY_START: 20
+, OP_LT: 30
+, OP_GT: 40
+, QUERY_VALUE_START: 50
+, QUERY_VALUE: 60
+, QUERY_VALUE_DOUBLEQUOTED: 70
+}
+
+function Term() {
+  this.field = null
+  this.op = null
+  this.query = ''
+}
+
+function QueryParser() {
+  this.terms = []
+  this.currentTerm = new Term()
+  this.state = State.TERM_START
+}
+
+QueryParser.parse = function(input) {
+  var parser = new QueryParser()
+  return parser.parse(input)
+}
+
+QueryParser.prototype.parse = function(input) {
+  var chars = input.split('')
+  for (var i = 0, l = chars.length; i < l; ++i) {
+    this.consume(chars[i])
+  }
+  return this.terms
+}
+
+QueryParser.prototype.consume = function(input) {
+  switch (this.state) {
+  case State.TERM_START:
+    if (this.isWhitespace(input)) {
+      // Preceding whitespace, ignore.
+      return
+    }
+    this.terms.push(this.currentTerm)
+    this.state = State.QUERY_START
+    return this.consume(input)
+  case State.QUERY_START:
+    if (this.isWhitespace(input)) {
+      // Preceding whitespace, ignore.
+      return
+    }
+    if (input === '<') {
+      this.state = State.OP_LT
+      return
+    }
+    if (input === '>') {
+      this.state = State.OP_GT
+      return
+    }
+    this.state = State.QUERY_VALUE_START
+    return this.consume(input)
+  case State.OP_LT:
+    if (input === '=') {
+      this.currentTerm.op = '<='
+      this.state = State.QUERY_VALUE_START
+      return
+    }
+    this.currentTerm.op = '<'
+    this.state = State.QUERY_VALUE_START
+    return this.consume(input)
+  case State.OP_GT:
+    if (input === '=') {
+      this.currentTerm.op = '>='
+      this.state = State.QUERY_VALUE_START
+      return
+    }
+    this.currentTerm.op = '>'
+    this.state = State.QUERY_VALUE_START
+    return this.consume(input)
+  case State.QUERY_VALUE_START:
+    if (this.isWhitespace(input)) {
+      // Preceding whitespace, ignore.
+      return
+    }
+    if (input === '"') {
+      this.state = State.QUERY_VALUE_DOUBLEQUOTED
+      return
+    }
+    this.state = State.QUERY_VALUE
+    return this.consume(input)
+  case State.QUERY_VALUE:
+    if (this.isWhitespace(input)) {
+      return this.concludeTerm()
+    }
+    if (input === ':') {
+      this.currentTerm.field = this.currentTerm.query
+      this.currentTerm.query = ''
+      this.state = State.QUERY_START
+      return
+    }
+    this.currentTerm.query += input
+    return
+  case State.QUERY_VALUE_DOUBLEQUOTED:
+    if (input === '\\') {
+      return
+    }
+    if (input === '"') {
+      return this.concludeTerm()
+    }
+    this.currentTerm.query += input
+    return
+  }
+}
+
+QueryParser.prototype.concludeTerm = function() {
+  this.currentTerm = new Term()
+  this.state = State.TERM_START
+}
+
+QueryParser.prototype.isWhitespace = function(input) {
+  return input === ' ' || input === '\t' || input === '\n' || input === ''
+}
+
+module.exports = QueryParser