gorillajs
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A smart development environment designed to easily install and neatly manage web applications. Gorilla JS frees you from the repetitive daily tasks like apps installation, database management, creation of virtual environment, server configuration… And it
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text/coffeescript
Pattern = require './Pattern'
Unescaper = require './Unescaper'
Escaper = require './Escaper'
Utils = require './Utils'
ParseException = require './Exception/ParseException'
ParseMore = require './Exception/ParseMore'
DumpException = require './Exception/DumpException'
# Inline YAML parsing and dumping
class Inline
# Quoted string regular expression
@REGEX_QUOTED_STRING: '(?:"(?:[^"\\\\]*(?:\\\\.[^"\\\\]*)*)"|\'(?:[^\']*(?:\'\'[^\']*)*)\')'
# Pre-compiled patterns
#
@PATTERN_TRAILING_COMMENTS: new Pattern '^\\s*#.*$'
@PATTERN_QUOTED_SCALAR: new Pattern '^'+@REGEX_QUOTED_STRING
@PATTERN_THOUSAND_NUMERIC_SCALAR: new Pattern '^(-|\\+)?[0-9,]+(\\.[0-9]+)?$'
@PATTERN_SCALAR_BY_DELIMITERS: {}
# Settings
@settings: {}
# Configure YAML inline.
#
# @param [Boolean] exceptionOnInvalidType true if an exception must be thrown on invalid types (a JavaScript resource or object), false otherwise
# @param [Function] objectDecoder A function to deserialize custom objects, null otherwise
#
@configure: (exceptionOnInvalidType = null, objectDecoder = null) ->
# Update settings
@settings.exceptionOnInvalidType = exceptionOnInvalidType
@settings.objectDecoder = objectDecoder
return
# Converts a YAML string to a JavaScript object.
#
# @param [String] value A YAML string
# @param [Boolean] exceptionOnInvalidType true if an exception must be thrown on invalid types (a JavaScript resource or object), false otherwise
# @param [Function] objectDecoder A function to deserialize custom objects, null otherwise
#
# @return [Object] A JavaScript object representing the YAML string
#
# @throw [ParseException]
#
@parse: (value, exceptionOnInvalidType = false, objectDecoder = null) ->
# Update settings from last call of Inline.parse()
@settings.exceptionOnInvalidType = exceptionOnInvalidType
@settings.objectDecoder = objectDecoder
if not value?
return ''
value = Utils.trim value
if 0 is value.length
return ''
# Keep a context object to pass through static methods
context = {exceptionOnInvalidType, objectDecoder, i: 0}
switch value.charAt(0)
when '['
result = @parseSequence value, context
++context.i
when '{'
result = @parseMapping value, context
++context.i
else
result = @parseScalar value, null, ['"', "'"], context
# Some comments are allowed at the end
if @PATTERN_TRAILING_COMMENTS.replace(value[context.i..], '') isnt ''
throw new ParseException 'Unexpected characters near "'+value[context.i..]+'".'
return result
# Dumps a given JavaScript variable to a YAML string.
#
# @param [Object] value The JavaScript variable to convert
# @param [Boolean] exceptionOnInvalidType true if an exception must be thrown on invalid types (a JavaScript resource or object), false otherwise
# @param [Function] objectEncoder A function to serialize custom objects, null otherwise
#
# @return [String] The YAML string representing the JavaScript object
#
# @throw [DumpException]
#
@dump: (value, exceptionOnInvalidType = false, objectEncoder = null) ->
if not value?
return 'null'
type = typeof value
if type is 'object'
if value instanceof Date
return value.toISOString()
else if objectEncoder?
result = objectEncoder value
if typeof result is 'string' or result?
return result
return @dumpObject value
if type is 'boolean'
return (if value then 'true' else 'false')
if Utils.isDigits(value)
return (if type is 'string' then "'"+value+"'" else String(parseInt(value)))
if Utils.isNumeric(value)
return (if type is 'string' then "'"+value+"'" else String(parseFloat(value)))
if type is 'number'
return (if value is Infinity then '.Inf' else (if value is -Infinity then '-.Inf' else (if isNaN(value) then '.NaN' else value)))
if Escaper.requiresDoubleQuoting value
return Escaper.escapeWithDoubleQuotes value
if Escaper.requiresSingleQuoting value
return Escaper.escapeWithSingleQuotes value
if '' is value
return '""'
if Utils.PATTERN_DATE.test value
return "'"+value+"'";
if value.toLowerCase() in ['null','~','true','false']
return "'"+value+"'"
# Default
return value;
# Dumps a JavaScript object to a YAML string.
#
# @param [Object] value The JavaScript object to dump
# @param [Boolean] exceptionOnInvalidType true if an exception must be thrown on invalid types (a JavaScript resource or object), false otherwise
# @param [Function] objectEncoder A function do serialize custom objects, null otherwise
#
# @return string The YAML string representing the JavaScript object
#
@dumpObject: (value, exceptionOnInvalidType, objectSupport = null) ->
# Array
if value instanceof Array
output = []
for val in value
output.push @dump val
return '['+output.join(', ')+']'
# Mapping
else
output = []
for key, val of value
output.push @dump(key)+': '+@dump(val)
return '{'+output.join(', ')+'}'
# Parses a scalar to a YAML string.
#
# @param [Object] scalar
# @param [Array] delimiters
# @param [Array] stringDelimiters
# @param [Object] context
# @param [Boolean] evaluate
#
# @return [String] A YAML string
#
# @throw [ParseException] When malformed inline YAML string is parsed
#
@parseScalar: (scalar, delimiters = null, stringDelimiters = ['"', "'"], context = null, evaluate = true) ->
unless context?
context = exceptionOnInvalidType: @settings.exceptionOnInvalidType, objectDecoder: @settings.objectDecoder, i: 0
{i} = context
if scalar.charAt(i) in stringDelimiters
# Quoted scalar
output = @parseQuotedScalar scalar, context
{i} = context
if delimiters?
tmp = Utils.ltrim scalar[i..], ' '
if not(tmp.charAt(0) in delimiters)
throw new ParseException 'Unexpected characters ('+scalar[i..]+').'
else
# "normal" string
if not delimiters
output = scalar[i..]
i += output.length
# Remove comments
strpos = output.indexOf ' #'
if strpos isnt -1
output = Utils.rtrim output[0...strpos]
else
joinedDelimiters = delimiters.join('|')
pattern = @PATTERN_SCALAR_BY_DELIMITERS[joinedDelimiters]
unless pattern?
pattern = new Pattern '^(.+?)('+joinedDelimiters+')'
@PATTERN_SCALAR_BY_DELIMITERS[joinedDelimiters] = pattern
if match = pattern.exec scalar[i..]
output = match[1]
i += output.length
else
throw new ParseException 'Malformed inline YAML string ('+scalar+').'
if evaluate
output = @evaluateScalar output, context
context.i = i
return output
# Parses a quoted scalar to YAML.
#
# @param [String] scalar
# @param [Object] context
#
# @return [String] A YAML string
#
# @throw [ParseMore] When malformed inline YAML string is parsed
#
@parseQuotedScalar: (scalar, context) ->
{i} = context
unless match = @PATTERN_QUOTED_SCALAR.exec scalar[i..]
throw new ParseMore 'Malformed inline YAML string ('+scalar[i..]+').'
output = match[0].substr(1, match[0].length - 2)
if '"' is scalar.charAt(i)
output = Unescaper.unescapeDoubleQuotedString output
else
output = Unescaper.unescapeSingleQuotedString output
i += match[0].length
context.i = i
return output
# Parses a sequence to a YAML string.
#
# @param [String] sequence
# @param [Object] context
#
# @return [String] A YAML string
#
# @throw [ParseMore] When malformed inline YAML string is parsed
#
@parseSequence: (sequence, context) ->
output = []
len = sequence.length
{i} = context
i += 1
# [foo, bar, ...]
while i < len
context.i = i
switch sequence.charAt(i)
when '['
# Nested sequence
output.push @parseSequence sequence, context
{i} = context
when '{'
# Nested mapping
output.push @parseMapping sequence, context
{i} = context
when ']'
return output
when ',', ' ', "\n"
# Do nothing
else
isQuoted = (sequence.charAt(i) in ['"', "'"])
value = @parseScalar sequence, [',', ']'], ['"', "'"], context
{i} = context
if not(isQuoted) and typeof(value) is 'string' and (value.indexOf(': ') isnt -1 or value.indexOf(":\n") isnt -1)
# Embedded mapping?
try
value = @parseMapping '{'+value+'}'
catch e
# No, it's not
output.push value
--i
++i
throw new ParseMore 'Malformed inline YAML string '+sequence
# Parses a mapping to a YAML string.
#
# @param [String] mapping
# @param [Object] context
#
# @return [String] A YAML string
#
# @throw [ParseMore] When malformed inline YAML string is parsed
#
@parseMapping: (mapping, context) ->
output = {}
len = mapping.length
{i} = context
i += 1
# {foo: bar, bar:foo, ...}
shouldContinueWhileLoop = false
while i < len
context.i = i
switch mapping.charAt(i)
when ' ', ',', "\n"
++i
context.i = i
shouldContinueWhileLoop = true
when '}'
return output
if shouldContinueWhileLoop
shouldContinueWhileLoop = false
continue
# Key
key = @parseScalar mapping, [':', ' ', "\n"], ['"', "'"], context, false
{i} = context
# Value
done = false
while i < len
context.i = i
switch mapping.charAt(i)
when '['
# Nested sequence
value = @parseSequence mapping, context
{i} = context
# Spec: Keys MUST be unique; first one wins.
# Parser cannot abort this mapping earlier, since lines
# are processed sequentially.
if output[key] == undefined
output[key] = value
done = true
when '{'
# Nested mapping
value = @parseMapping mapping, context
{i} = context
# Spec: Keys MUST be unique; first one wins.
# Parser cannot abort this mapping earlier, since lines
# are processed sequentially.
if output[key] == undefined
output[key] = value
done = true
when ':', ' ', "\n"
# Do nothing
else
value = @parseScalar mapping, [',', '}'], ['"', "'"], context
{i} = context
# Spec: Keys MUST be unique; first one wins.
# Parser cannot abort this mapping earlier, since lines
# are processed sequentially.
if output[key] == undefined
output[key] = value
done = true
--i
++i
if done
break
throw new ParseMore 'Malformed inline YAML string '+mapping
# Evaluates scalars and replaces magic values.
#
# @param [String] scalar
#
# @return [String] A YAML string
#
@evaluateScalar: (scalar, context) ->
scalar = Utils.trim(scalar)
scalarLower = scalar.toLowerCase()
switch scalarLower
when 'null', '', '~'
return null
when 'true'
return true
when 'false'
return false
when '.inf'
return Infinity
when '.nan'
return NaN
when '-.inf'
return Infinity
else
firstChar = scalarLower.charAt(0)
switch firstChar
when '!'
firstSpace = scalar.indexOf(' ')
if firstSpace is -1
firstWord = scalarLower
else
firstWord = scalarLower[0...firstSpace]
switch firstWord
when '!'
if firstSpace isnt -1
return parseInt @parseScalar(scalar[2..])
return null
when '!str'
return Utils.ltrim scalar[4..]
when '!!str'
return Utils.ltrim scalar[5..]
when '!!int'
return parseInt(@parseScalar(scalar[5..]))
when '!!bool'
return Utils.parseBoolean(@parseScalar(scalar[6..]), false)
when '!!float'
return parseFloat(@parseScalar(scalar[7..]))
when '!!timestamp'
return Utils.stringToDate(Utils.ltrim(scalar[11..]))
else
unless context?
context = exceptionOnInvalidType: @settings.exceptionOnInvalidType, objectDecoder: @settings.objectDecoder, i: 0
{objectDecoder, exceptionOnInvalidType} = context
if objectDecoder
# If objectDecoder function is given, we can do custom decoding of custom types
trimmedScalar = Utils.rtrim scalar
firstSpace = trimmedScalar.indexOf(' ')
if firstSpace is -1
return objectDecoder trimmedScalar, null
else
subValue = Utils.ltrim trimmedScalar[firstSpace+1..]
unless subValue.length > 0
subValue = null
return objectDecoder trimmedScalar[0...firstSpace], subValue
if exceptionOnInvalidType
throw new ParseException 'Custom object support when parsing a YAML file has been disabled.'
return null
when '0'
if '0x' is scalar[0...2]
return Utils.hexDec scalar
else if Utils.isDigits scalar
return Utils.octDec scalar
else if Utils.isNumeric scalar
return parseFloat scalar
else
return scalar
when '+'
if Utils.isDigits scalar
raw = scalar
cast = parseInt(raw)
if raw is String(cast)
return cast
else
return raw
else if Utils.isNumeric scalar
return parseFloat scalar
else if @PATTERN_THOUSAND_NUMERIC_SCALAR.test scalar
return parseFloat(scalar.replace(',', ''))
return scalar
when '-'
if Utils.isDigits(scalar[1..])
if '0' is scalar.charAt(1)
return -Utils.octDec(scalar[1..])
else
raw = scalar[1..]
cast = parseInt(raw)
if raw is String(cast)
return -cast
else
return -raw
else if Utils.isNumeric scalar
return parseFloat scalar
else if @PATTERN_THOUSAND_NUMERIC_SCALAR.test scalar
return parseFloat(scalar.replace(',', ''))
return scalar
else
if date = Utils.stringToDate(scalar)
return date
else if Utils.isNumeric(scalar)
return parseFloat scalar
else if @PATTERN_THOUSAND_NUMERIC_SCALAR.test scalar
return parseFloat(scalar.replace(',', ''))
return scalar
module.exports = Inline