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Diffstat (limited to 'src/YamlInline.js')
| -rw-r--r-- | src/YamlInline.js | 557 |
1 files changed, 557 insertions, 0 deletions
diff --git a/src/YamlInline.js b/src/YamlInline.js new file mode 100644 index 0000000..a024385 --- /dev/null +++ b/src/YamlInline.js @@ -0,0 +1,557 @@ + +/** + * YamlInline implements a YAML parser/dumper for the YAML inline syntax. + */ +var YamlInline = function(){}; +YamlInline.prototype = +{ + i: null, + + /** + * Convert a YAML string to a JS object. + * + * @param string value A YAML string + * + * @return object A JS object representing the YAML string + */ + parse: function(value) + { + var result = null; + value = this.trim(value); + + if ( 0 == value.length ) + { + return ''; + } + + switch ( value.charAt(0) ) + { + case '[': + result = this.parseSequence(value); + break; + case '{': + result = this.parseMapping(value); + break; + default: + result = this.parseScalar(value); + + // some comment can end the scalar + if ( value.substr(this.i).replace(/^\s+#.*$/, '') ) { + throw new YamlParseException('Unexpected characters near "'+value.substr(this.i)+'".'); + } + } + + return result; + }, + + /** + * Dumps a given JS variable to a YAML string. + * + * @param mixed value The JS variable to convert + * + * @return string The YAML string representing the JS object + */ + dump: function(value) + { + if ( undefined == value || null == value ) + return 'null'; + if ( value instanceof Date) + return value.toISOString(); + if ( typeof(value) == 'object') + return this.dumpObject(value); + if ( typeof(value) == 'boolean' ) + return value ? 'true' : 'false'; + if ( /^\d+$/.test(value) ) + return typeof(value) == 'string' ? "'"+value+"'" : parseInt(value); + if ( this.isNumeric(value) ) + return typeof(value) == 'string' ? "'"+value+"'" : parseFloat(value); + if ( typeof(value) == 'number' ) + return value == Infinity ? '.Inf' : ( value == -Infinity ? '-.Inf' : ( isNaN(value) ? '.NAN' : value ) ); + var yaml = new YamlEscaper(); + if ( yaml.requiresDoubleQuoting(value) ) + return yaml.escapeWithDoubleQuotes(value); + if ( yaml.requiresSingleQuoting(value) ) + return yaml.escapeWithSingleQuotes(value); + if ( '' == value ) + return ""; + if ( this.getTimestampRegex().test(value) ) + return "'"+value+"'"; + if ( this.inArray(value.toLowerCase(), ['null','~','true','false']) ) + return "'"+value+"'"; + // default + return value; + }, + + /** + * Dumps a JS object to a YAML string. + * + * @param object value The JS array to dump + * + * @return string The YAML string representing the JS object + */ + dumpObject: function(value) + { + var keys = this.getKeys(value); + var output = null; + var i; + var len = keys.length; + + // array + if ( value instanceof Array ) + /*( 1 == len && '0' == keys[0] ) + || + ( len > 1 && this.reduceArray(keys, function(v,w){return Math.floor(v+w);}, 0) == len * (len - 1) / 2) )*/ + { + output = []; + for ( i = 0; i < len; i++ ) + { + output.push(this.dump(value[keys[i]])); + } + + return '['+output.join(', ')+']'; + } + + // mapping + output = []; + for ( i = 0; i < len; i++ ) + { + output.push(this.dump(keys[i])+': '+this.dump(value[keys[i]])); + } + + return '{ '+output.join(', ')+' }'; + }, + + /** + * Parses a scalar to a YAML string. + * + * @param scalar scalar + * @param string delimiters + * @param object stringDelimiters + * @param integer i + * @param boolean evaluate + * + * @return string A YAML string + * + * @throws YamlParseException When malformed inline YAML string is parsed + */ + parseScalar: function(scalar, delimiters, stringDelimiters, i, evaluate) + { + if ( delimiters == undefined ) delimiters = null; + if ( stringDelimiters == undefined ) stringDelimiters = ['"', "'"]; + if ( i == undefined ) i = 0; + if ( evaluate == undefined ) evaluate = true; + + var output = null; + var pos = null; + var matches = null; + + if ( this.inArray(scalar[i], stringDelimiters) ) + { + // quoted scalar + output = this.parseQuotedScalar(scalar, i); + i = this.i; + if (null !== delimiters) { + var tmp = scalar.substr(i).replace(/^\s+/, ''); + if (!this.inArray(tmp.charAt(0), delimiters)) { + throw new YamlParseException('Unexpected characters ('+scalar.substr(i)+').'); + } + } + } + else + { + // "normal" string + if ( !delimiters ) + { + output = (scalar+'').substring(i); + + i += output.length; + + // remove comments + pos = output.indexOf(' #'); + if ( pos != -1 ) + { + output = output.substr(0, pos).replace(/\s+$/g,''); + } + } + else if ( matches = new RegExp('^(.+?)('+delimiters.join('|')+')').exec((scalar+'').substring(i)) ) + { + output = matches[1]; + i += output.length; + } + else + { + throw new YamlParseException('Malformed inline YAML string ('+scalar+').'); + } + output = evaluate ? this.evaluateScalar(output) : output; + } + + this.i = i; + + return output; + }, + + /** + * Parses a quoted scalar to YAML. + * + * @param string scalar + * @param integer i + * + * @return string A YAML string + * + * @throws YamlParseException When malformed inline YAML string is parsed + */ + parseQuotedScalar: function(scalar, i) + { + var matches = null; + //var item = /^(.*?)['"]\s*(?:[,:]|[}\]]\s*,)/.exec((scalar+'').substring(i))[1]; + + if ( !(matches = new RegExp('^'+YamlInline.REGEX_QUOTED_STRING).exec((scalar+'').substring(i))) ) + { + throw new YamlParseException('Malformed inline YAML string ('+(scalar+'').substring(i)+').'); + } + + var output = matches[0].substr(1, matches[0].length - 2); + + var unescaper = new YamlUnescaper(); + + if ( '"' == (scalar+'').charAt(i) ) + { + output = unescaper.unescapeDoubleQuotedString(output); + } + else + { + output = unescaper.unescapeSingleQuotedString(output); + } + + i += matches[0].length; + + this.i = i; + return output; + }, + + /** + * Parses a sequence to a YAML string. + * + * @param string sequence + * @param integer i + * + * @return string A YAML string + * + * @throws YamlParseException When malformed inline YAML string is parsed + */ + parseSequence: function(sequence, i) + { + if ( i == undefined ) i = 0; + + var output = []; + var len = sequence.length; + i += 1; + + // [foo, bar, ...] + while ( i < len ) + { + switch ( sequence.charAt(i) ) + { + case '[': + // nested sequence + output.push(this.parseSequence(sequence, i)); + i = this.i; + break; + case '{': + // nested mapping + output.push(this.parseMapping(sequence, i)); + i = this.i; + break; + case ']': + this.i = i; + return output; + case ',': + case ' ': + break; + default: + isQuoted = this.inArray(sequence.charAt(i), ['"', "'"]); + var value = this.parseScalar(sequence, [',', ']'], ['"', "'"], i); + i = this.i; + + if ( !isQuoted && (value+'').indexOf(': ') != -1 ) + { + // embedded mapping? + try + { + value = this.parseMapping('{'+value+'}'); + } + catch ( e ) + { + if ( !(e instanceof YamlParseException ) ) throw e; + // no, it's not + } + } + + output.push(value); + + i--; + } + + i++; + } + + throw new YamlParseException('Malformed inline YAML string "'+sequence+'"'); + }, + + /** + * Parses a mapping to a YAML string. + * + * @param string mapping + * @param integer i + * + * @return string A YAML string + * + * @throws YamlParseException When malformed inline YAML string is parsed + */ + parseMapping: function(mapping, i) + { + if ( i == undefined ) i = 0; + var output = {}; + var len = mapping.length; + i += 1; + var done = false; + var doContinue = false; + + // {foo: bar, bar:foo, ...} + while ( i < len ) + { + doContinue = false; + + switch ( mapping.charAt(i) ) + { + case ' ': + case ',': + i++; + doContinue = true; + break; + case '}': + this.i = i; + return output; + } + + if ( doContinue ) continue; + + // key + var key = this.parseScalar(mapping, [':', ' '], ['"', "'"], i, false); + i = this.i; + + // value + done = false; + while ( i < len ) + { + switch ( mapping.charAt(i) ) + { + case '[': + // nested sequence + output[key] = this.parseSequence(mapping, i); + i = this.i; + done = true; + break; + case '{': + // nested mapping + output[key] = this.parseMapping(mapping, i); + i = this.i; + done = true; + break; + case ':': + case ' ': + break; + default: + output[key] = this.parseScalar(mapping, [',', '}'], ['"', "'"], i); + i = this.i; + done = true; + i--; + } + + ++i; + + if ( done ) + { + doContinue = true; + break; + } + } + + if ( doContinue ) continue; + } + + throw new YamlParseException('Malformed inline YAML string "'+mapping+'"'); + }, + + /** + * Evaluates scalars and replaces magic values. + * + * @param string scalar + * + * @return string A YAML string + */ + evaluateScalar: function(scalar) + { + scalar = this.trim(scalar); + + var raw = null; + var cast = null; + + if ( ( 'null' == scalar.toLowerCase() ) || + ( '' == scalar ) || + ( '~' == scalar ) ) + return null; + if ( (scalar+'').indexOf('!str ') == 0 ) + return (''+scalar).substring(5); + if ( (scalar+'').indexOf('! ') == 0 ) + return parseInt(this.parseScalar((scalar+'').substr(2))); + if ( /^\d+$/.test(scalar) ) + { + raw = scalar; + cast = parseInt(scalar); + return '0' == scalar.charAt(0) ? this.octdec(scalar) : (( ''+raw == ''+cast ) ? cast : raw); + } + if ( 'true' == (scalar+'').toLowerCase() ) + return true; + if ( 'false' == (scalar+'').toLowerCase() ) + return false; + if ( this.isNumeric(scalar) ) + return '0x' == (scalar+'').substr(0, 2) ? this.hexdec(scalar) : parseFloat(scalar); + if ( scalar.toLowerCase() == '.inf' ) + return Infinity; + if ( scalar.toLowerCase() == '.nan' ) + return NaN; + if ( scalar.toLowerCase() == '-.inf' ) + return -Infinity; + if ( /^(-|\+)?[0-9,]+(\.[0-9]+)?$/.test(scalar) ) + return parseFloat(scalar.split(',').join('')); + if ( this.getTimestampRegex().test(scalar) ) + return new Date(this.strtotime(scalar)); + //else + return ''+scalar; + }, + + /** + * Gets a regex that matches an unix timestamp + * + * @return string The regular expression + */ + getTimestampRegex: function() + { + return new RegExp('^'+ + '([0-9][0-9][0-9][0-9])'+ + '-([0-9][0-9]?)'+ + '-([0-9][0-9]?)'+ + '(?:(?:[Tt]|[ \t]+)'+ + '([0-9][0-9]?)'+ + ':([0-9][0-9])'+ + ':([0-9][0-9])'+ + '(?:\.([0-9]*))?'+ + '(?:[ \t]*(Z|([-+])([0-9][0-9]?)'+ + '(?::([0-9][0-9]))?))?)?'+ + '$','gi'); + }, + + trim: function(str /* String */) + { + return (str+'').replace(/^\s+/,'').replace(/\s+$/,''); + }, + + isNumeric: function(input) + { + return (input - 0) == input && input.length > 0 && input.replace(/\s+/g,'') != ''; + }, + + inArray: function(key, tab) + { + var i; + var len = tab.length; + for ( i = 0; i < len; i++ ) + { + if ( key == tab[i] ) return true; + } + return false; + }, + + getKeys: function(tab) + { + var ret = []; + + for ( var name in tab ) + { + if ( tab.hasOwnProperty(name) ) + { + ret.push(name); + } + } + + return ret; + }, + + /*reduceArray: function(tab, fun) + { + var len = tab.length; + if (typeof fun != "function") + throw new YamlParseException("fun is not a function"); + + // no value to return if no initial value and an empty array + if (len == 0 && arguments.length == 1) + throw new YamlParseException("empty array"); + + var i = 0; + if (arguments.length >= 2) + { + var rv = arguments[1]; + } + else + { + do + { + if (i in tab) + { + rv = tab[i++]; + break; + } + + // if array contains no values, no initial value to return + if (++i >= len) + throw new YamlParseException("no initial value to return"); + } + while (true); + } + + for (; i < len; i++) + { + if (i in tab) + rv = fun.call(null, rv, tab[i], i, tab); + } + + return rv; + },*/ + + octdec: function(input) + { + return parseInt((input+'').replace(/[^0-7]/gi, ''), 8); + }, + + hexdec: function(input) + { + input = this.trim(input); + if ( (input+'').substr(0, 2) == '0x' ) input = (input+'').substring(2); + return parseInt((input+'').replace(/[^a-f0-9]/gi, ''), 16); + }, + + /** + * @see http://phpjs.org/functions/strtotime + * @note we need timestamp with msecs so /1000 removed + * @note original contained binary | 0 (wtf?!) everywhere, which messes everything up + */ + strtotime: function (h,b){var f,c,g,k,d="";h=(h+"").replace(/\s{2,}|^\s|\s$/g," ").replace(/[\t\r\n]/g,"");if(h==="now"){return b===null||isNaN(b)?new Date().getTime()||0:b||0}else{if(!isNaN(d=Date.parse(h))){return d||0}else{if(b){b=new Date(b)}else{b=new Date()}}}h=h.toLowerCase();var e={day:{sun:0,mon:1,tue:2,wed:3,thu:4,fri:5,sat:6},mon:["jan","feb","mar","apr","may","jun","jul","aug","sep","oct","nov","dec"]};var a=function(i){var o=(i[2]&&i[2]==="ago");var n=(n=i[0]==="last"?-1:1)*(o?-1:1);switch(i[0]){case"last":case"next":switch(i[1].substring(0,3)){case"yea":b.setFullYear(b.getFullYear()+n);break;case"wee":b.setDate(b.getDate()+(n*7));break;case"day":b.setDate(b.getDate()+n);break;case"hou":b.setHours(b.getHours()+n);break;case"min":b.setMinutes(b.getMinutes()+n);break;case"sec":b.setSeconds(b.getSeconds()+n);break;case"mon":if(i[1]==="month"){b.setMonth(b.getMonth()+n);break}default:var l=e.day[i[1].substring(0,3)];if(typeof l!=="undefined"){var p=l-b.getDay();if(p===0){p=7*n}else{if(p>0){if(i[0]==="last"){p-=7}}else{if(i[0]==="next"){p+=7}}}b.setDate(b.getDate()+p);b.setHours(0,0,0,0)}}break;default:if(/\d+/.test(i[0])){n*=parseInt(i[0],10);switch(i[1].substring(0,3)){case"yea":b.setFullYear(b.getFullYear()+n);break;case"mon":b.setMonth(b.getMonth()+n);break;case"wee":b.setDate(b.getDate()+(n*7));break;case"day":b.setDate(b.getDate()+n);break;case"hou":b.setHours(b.getHours()+n);break;case"min":b.setMinutes(b.getMinutes()+n);break;case"sec":b.setSeconds(b.getSeconds()+n);break}}else{return false}break}return true};g=h.match(/^(\d{2,4}-\d{2}-\d{2})(?:\s(\d{1,2}:\d{2}(:\d{2})?)?(?:\.(\d+))?)?$/);if(g!==null){if(!g[2]){g[2]="00:00:00"}else{if(!g[3]){g[2]+=":00"}}k=g[1].split(/-/g);k[1]=e.mon[k[1]-1]||k[1];k[0]=+k[0];k[0]=(k[0]>=0&&k[0]<=69)?"20"+(k[0]<10?"0"+k[0]:k[0]+""):(k[0]>=70&&k[0]<=99)?"19"+k[0]:k[0]+"";return parseInt(this.strtotime(k[2]+" "+k[1]+" "+k[0]+" "+g[2])+(g[4]?g[4]:""),10)}var j="([+-]?\\d+\\s(years?|months?|weeks?|days?|hours?|min|minutes?|sec|seconds?|sun\\.?|sunday|mon\\.?|monday|tue\\.?|tuesday|wed\\.?|wednesday|thu\\.?|thursday|fri\\.?|friday|sat\\.?|saturday)|(last|next)\\s(years?|months?|weeks?|days?|hours?|min|minutes?|sec|seconds?|sun\\.?|sunday|mon\\.?|monday|tue\\.?|tuesday|wed\\.?|wednesday|thu\\.?|thursday|fri\\.?|friday|sat\\.?|saturday))(\\sago)?";g=h.match(new RegExp(j,"gi"));if(g===null){return false}for(f=0,c=g.length;f<c;f++){if(!a(g[f].split(" "))){return false}}return b.getTime()||0} + +}; + +/* + * @note uses only non-capturing sub-patterns (unlike PHP original) + */ +YamlInline.REGEX_QUOTED_STRING = '(?:"(?:[^"\\\\]*(?:\\\\.[^"\\\\]*)*)"|\'(?:[^\']*(?:\'\'[^\']*)*)\')'; + |