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tap_i18n_db.js
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tap_i18n_db.js
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let extend;
if (Meteor.isServer) {
extend = Npm.require('extend');
}
else {
extend = $.extend;
}
const transform = function(options) {
return (doc) => {
if (options.transform) {
doc = options.transform(doc);
}
if (!options.lang || !doc.i18n) {
delete doc.i18n;
return doc
}
doc = extend({}, doc); // protect original object.
if (doc.i18n[options.lang]) {
extend(doc, doc.i18n[options.lang]);
}
delete doc.i18n;
return doc;
}
};
const removeTrailingUndefs = function(arr) {
while ((!_.isEmpty(arr)) && (_.isUndefined(_.last(arr)))) {
arr.pop();
}
return arr;
};
const dialectOf = function(lang) {
let ref;
if ((typeof lang !== "undefined" && lang !== null) && (ref = "-", lang.indexOf(ref) >= 0)) {
return lang.replace(/-.*/, "");
}
return null;
};
class TAPi18nCollection extends Mongo.Collection {
constructor(name, options) {
super(name, options = {});
this._base_language = "base_language" in options ? options["base_language"] : globals.fallback_language;
}
find(selector = {}, options = {}) {
if (!options.lang) {
options.lang = TAPi18n.getLanguage();
}
// Allow for null language to return the full document.
if (options.lang == null) {
return super.find(selector, options);
}
if (options.lang != 'en') {
let _selector = extend({}, selector);
selector = {};
for (let prop in _selector) {
let orFieldQuery = {$or: [
{ [prop]: _selector[prop] },
{ [`i18n.${options.lang}.${prop}`]: _selector[prop] }
]};
if (_selector.length > 1) {
selector['$and'] = [];
selector['$and'].push(orFieldQuery);
}
else if (prop != '_id') {
selector = orFieldQuery;
}
else {
selector = _selector;
}
}
}
let dialect_of = dialectOf(options.lang);
let collection_base_language = this._base_language;
let supported_languages = TAPi18n.conf.supported_languages || Object.keys(TAPi18n.languages_names);
if ((typeof options.lang !== "undefined" && options.lang !== null) && !(supported_languages.indexOf(options.lang) >= 0)) {
throw new Meteor.Error(400, `Not supported language "${options.lang}", are you subscribing to the collection "${this._name}" using the TAPi18n.subscribe and not Meteor.subscribe`);
}
let original_fields = options.fields || {};
let i18n_fields = extend({}, original_fields);
if (!_.isEmpty(i18n_fields)) {
// determine the projection kind
// note that we don't need to address the case where {_id: 0}, since _id: 0
// is not allowed for cursors returned from a publish function
delete i18n_fields._id;
let white_list_projection = _.first(_.values(i18n_fields)) === 1;
if ("_id" in original_fields) {
i18n_fields["_id"] = original_fields["_id"];
}
if (white_list_projection) {
if (lang !== null) {
for (let i = 0, lang; i < supported_languages.length; i++) {
lang = supported_languages[i];
if (lang !== collection_base_language && ((lang === options.lang) || (lang === dialect_of))) {
for (let field in original_fields) {
let ref;
if (field !== "_id" && !((ref = ".", field.indexOf(ref) >= 0))) {
i18n_fields[`i18n.${lang}.${field}`] = 1;
}
}
}
}
}
} else {
// black list
if (options.lang === null) {
i18n_fields.i18n = 0;
} else {
for (let j = 0, lang; j < supported_languages.length; j++) {
lang = supported_languages[j];
if (lang !== collection_base_language) {
if (lang !== options.lang && lang !== dialect_of) {
i18n_fields[`i18n.${lang}`] = 0;
} else {
for (let field in original_fields) {
let ref1;
if (field !== "_id" && !((ref1 = ".", field.indexOf(ref1) >= 0))) {
i18n_fields[`i18n.${lang}.${field}`] = 0;
}
}
}
}
}
}
}
} else {
if (options.lang === null) {
i18n_fields.i18n = 0;
} else {
for (let k = 0, lang; k < supported_languages.length; k++) {
lang = supported_languages[k];
if (lang !== collection_base_language && lang !== options.lang && lang !== dialect_of) {
i18n_fields[`i18n.${lang}`] = 0;
}
}
}
}
return super.find(selector, Object.assign({}, options, {
transform: transform(options),
fields: i18n_fields
}));
}
findOne(selector, options = {}) {
return this.find(selector, options).fetch()[0];
}
}
TAPi18n.Collection = TAPi18nCollection;
TAPi18n.publish = function(name, handler, options) {
if (name === null) {
throw new Meteor.Error(500, "TAPi18n.publish doesn't support null publications");
}
let i18n_handler = function() {
let args = extend([], arguments);
let language = args.pop();
TAPi18n.setLanguage(language);
this.language = language;
// Call the user handler without the language_tag argument
let cursors = handler.apply(this, args);
if ((typeof cursors !== "undefined" && cursors !== null)) {
return cursors;
}
};
// set the actual publish method
return Meteor.publish.apply(this, [name, i18n_handler, options]);
};
TAPi18n.subscribe = function(name) {
let params = Array.prototype.slice.call(arguments, 1);
let callbacks;
if (params.length) {
let lastParam = params[params.length - 1];
if (typeof lastParam === "function") {
callbacks.onReady = params.pop();
} else if (lastParam && (typeof lastParam.onReady === "function" || typeof lastParam.onError === "function")) {
callbacks = params.pop();
}
}
params.push(TAPi18n.getLanguage());
return Meteor.subscribe.apply(this, removeTrailingUndefs([name, ...params, callbacks]));
};
if (Meteor.isServer) {
TAPi18n.setLanguage = function(language) {
this._current_language = language;
}
TAPi18n.getLanguage = function(language) {
return this._current_language;
}
}