prisme-flow
Version:
prisme platform flow engine
152 lines (149 loc) • 5.61 kB
JavaScript
(function() {
function indentLine(str,length) {
if (length <= 0) {
return str;
}
var i = (new Array(length)).join(" ");
str = str.replace(/^\s*/,i);
return str;
}
function formatExpression(str) {
var length = str.length;
var start = 0;
var inString = false;
var inBox = false;
var quoteChar;
var list = [];
var stack = [];
var frame;
var v;
var matchingBrackets = {
"(":")",
"[":"]",
"{":"}"
}
for (var i=0;i<length;i++) {
var c = str[i];
if (!inString) {
if (c === "'" || c === '"') {
inString = true;
quoteChar = c;
frame = {type:"string",pos:i};
list.push(frame);
stack.push(frame);
} else if (c === ";") {
frame = {type:";",pos:i};
list.push(frame);
} else if (c === ",") {
frame = {type:",",pos:i};
list.push(frame);
} else if (/[\(\[\{]/.test(c)) {
frame = {type:"open-block",char:c,pos:i};
list.push(frame);
stack.push(frame);
} else if (/[\}\)\]]/.test(c)) {
var oldFrame = stack.pop();
if (matchingBrackets[oldFrame.char] !== c) {
//console.log("Stack frame mismatch",c,"at",i,"expected",matchingBrackets[oldFrame.char],"from",oldFrame.pos);
return str;
}
//console.log("Closing",c,"at",i,"compare",oldFrame.type,oldFrame.pos);
oldFrame.width = i-oldFrame.pos;
frame = {type:"close-block",pos:i,char:c,width:oldFrame.width}
list.push(frame);
}
} else {
if (c === quoteChar) {
// Next char must be a ]
inString = false;
stack.pop();
}
}
}
// console.log(stack);
var result = str;
var indent = 0;
var offset = 0;
var pre,post,indented;
var longStack = [];
list.forEach(function(f) {
if (f.type === ";" || f.type === ",") {
if (longStack[longStack.length-1]) {
pre = result.substring(0,offset+f.pos+1);
post = result.substring(offset+f.pos+1);
indented = indentLine(post,indent);
result = pre+"\n"+indented;
offset += indented.length-post.length+1;
}
} else if (f.type === "open-block") {
if (f.width > 30) {
longStack.push(true);
indent += 4;
pre = result.substring(0,offset+f.pos+1);
post = result.substring(offset+f.pos+1);
indented = indentLine(post,indent);
result = pre+"\n"+indented;
offset += indented.length-post.length+1;
} else {
longStack.push(false);
}
} else if (f.type === "close-block") {
if (f.width > 30) {
indent -= 4;
pre = result.substring(0,offset+f.pos);
post = result.substring(offset+f.pos);
indented = indentLine(post,indent);
result = pre+"\n"+indented;
offset += indented.length-post.length+1;
}
longStack.pop();
}
})
//console.log(result);
return result;
}
jsonata.format = formatExpression;
jsonata.functions =
{
'$append':{ args:['array','array'] },
'$average':{ args:['value'] },
'$boolean':{ args:['value'] },
'$contains':{ args:['str','pattern']},
'$count':{ args:['array'] },
'$exists':{ args:['value'] },
'$join':{ args:['array','separator'] },
'$keys':{ args:['object'] },
'$length':{ args:['string'] },
'$lookup':{ args:['object','key'] },
'$lowercase':{ args:['string'] },
'$match':{ args:['str','pattern','limit']},
'$map':{ args:[] },
'$max':{ args:['array'] },
'$min':{ args:['array'] },
'$not':{ args:['value'] },
'$number':{ args:['value'] },
'$reduce':{ args:[] },
'$replace':{ args:['str','pattern','replacement','limit']},
'$split':{ args:['string','separator','limit'] },
'$spread':{ args:['object'] },
'$string':{ args:['value'] },
'$substring':{ args:['string','start','length'] },
'$substringAfter':{ args:['string','chars'] },
'$substringBefore':{ args:['string','chars'] },
'$sum':{ args:['array'] },
'$trim': { args:['str'] },
'$uppercase':{ args:['string'] }
}
jsonata.getFunctionSnippet = function(fn) {
var snippetText = "";
if (jsonata.functions.hasOwnProperty(fn)) {
var def = jsonata.functions[fn];
snippetText = "\\"+fn+"(";
if (def.args) {
snippetText += def.args.map(function(a,i) { return "${"+(i+1)+":"+a+"}"}).join(", ");
}
snippetText += ")\n"
}
return snippetText;
}
})();