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Code Issues Releases Wiki Activity

Handlebars is synchronous, workaround, by calling rendering twice

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This commit is contained in:
Aiko Mastboom 2013-04-22 01:32:23 +02:00
parent a856ef8867
commit 5ef7f3aa3a
1 changed files with 79 additions and 22 deletions
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101
preview.js
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@ -84,36 +84,93 @@ module.exports = function (config, mongodataInstance) {
query: { name: parts[5]},
req: options.req
};
mongodataInstance.getMongoAttribute(template, function (err, attribute_result) {
mongodataInstance.getMongoContent(context, function (err, context_result) {
if (err) {
config.errors && console.log('ERR template_tag getMongoAttribute', template, err);
config.errors && console.log('ERR template_tag getMongoContent', context);
return callback(err);
}
var compiled_template = null;
try {
compiled_template = Handlebars.compile(attribute_result[template.attribute]);
} catch (err) {
config.errors && console.log('ERR template_tag Handlebars.compile', template, err);
return callback(err);
}
mongodataInstance.getMongoContent(context, function (err, context_result) {
mongodataInstance.getMongoAttribute(template, function (err, attribute_result) {
if (err) {
config.errors && console.log('ERR template_tag getMongoContent', context);
config.errors && console.log('ERR template_tag getMongoAttribute', template, err);
return callback(err);
}
var rendered = compiled_template(context_result);
config.debug && console.log('// recurse markers on rendered template');
context.query = {_id: context_result._id};
getPreviewHTML(rendered, context, function (err, preview_html) {
if (err) {
config.errors && console.log('ERR template_tag getPreviewHTML', err);
var compiled_template = null;
var keys_to_collect = {};
// Handlebars is synchronous ouch !!
var handlebars = Handlebars.create();
_.forEach(_.keys(context_result), function (key) {
handlebars.registerHelper(key, function (key_context, key_options) {
if (context_result[key].guid) {
if (keys_to_collect.hasOwnProperty(key)) {
return keys_to_collect[key];
} else {
keys_to_collect[key] = null;
return "";
}
}
return "";
});
});
try {
compiled_template = handlebars.compile(attribute_result[template.attribute]);
} catch (err) {
config.errors && console.log('ERR template_tag Handlebars.compile', template, err);
return callback(err);
}
try {
var tmp_rendered = compiled_template(context_result);
} catch (err) {
config.errors && console.log('ERR template_tag Handlebars.render', template, context, err);
return callback(err);
}
var promises = [];
_.forEach(_.keys(keys_to_collect), function (key) {
var deferred = when.defer();
var promise = deferred.promise;
promises.push(promise);
var attribute_context = {
collection: context.collection,
attribute: key,
query: { _id: context_result._id}
};
mongodataInstance.getMongoAttribute(attribute_context, function (err, template_attribute_result) {
if (err) {
config.errors && console.log('ERR handlebar.registerHelper getMongoAttribute', err);
deferred.reject(err);
}
var value = template_attribute_result[key];
keys_to_collect[key] = value;
deferred.resolve(value);
});
});
when.all(
promises,
function onSuccess(values) {
var rendered = null;
try {
rendered = compiled_template(context_result);
} catch (err) {
config.errors && console.log('ERR template_tag Handlebars.render', template, context, err);
return callback(err);
}
config.debug && console.log('// recurse markers on rendered template');
context.query = {_id: context_result._id};
getPreviewHTML(rendered, context, function (err, preview_html) {
if (err) {
config.errors && console.log('ERR template_tag getPreviewHTML', err);
return callback(err);
}
return callback(null, {
regExp: new RegExp(result, 'gmi'),
value: preview_html
});
});
},
function onFailure(err) {
config.errors && console.log('ERR template_tag resolving promises', err);
return callback(err);
}
return callback(null, {
regExp: new RegExp(result, 'gmi'),
value: preview_html
});
})
)
});
});
}));