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Add async mode to evaluateJSONataExpression

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This commit is contained in:
Nick O'Leary
2018-07-09 15:12:09 +01:00
parent d7adff9a65
commit b2f06b6777
2 changed files with 55 additions and 2 deletions
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33
red/runtime/util.js
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@@ -394,15 +394,44 @@ function prepareJSONataExpression(value,node) {
})
expr.registerFunction('clone', cloneMessage, '<(oa)-:o>');
expr._legacyMode = /(^|[^a-zA-Z0-9_'"])msg([^a-zA-Z0-9_'"]|$)/.test(value);
expr._node = node;
return expr;
}
function evaluateJSONataExpression(expr,msg) {
function evaluateJSONataExpression(expr,msg,callback) {
var context = msg;
if (expr._legacyMode) {
context = {msg:msg};
}
return expr.evaluate(context);
var bindings = {};
if (callback) {
// If callback provided, need to override the pre-assigned sync
// context functions to be their async variants
bindings.flowContext = function(val) {
return new Promise((resolve,reject) => {
expr._node.context().flow.get(val, function(err,value) {
if (err) {
reject(err);
} else {
resolve(value);
}
})
});
}
bindings.globalContext = function(val) {
return new Promise((resolve,reject) => {
expr._node.context().global.get(val, function(err,value) {
if (err) {
reject(err);
} else {
resolve(value);
}
})
});
}
}
return expr.evaluate(context, bindings, callback);
}