480 lines
11 KiB
JavaScript
480 lines
11 KiB
JavaScript
"use strict";
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var fs = require ("fs");
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var path = require ("path");
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var parse = require ("./parse");
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var INCLUDE_KEY = "include";
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var INDEX_FILE = "index.properties";
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var cast = function (value){
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if (value === null || value === "null") return null;
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if (value === "undefined") return undefined;
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if (value === "true") return true;
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if (value === "false") return false;
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var v = Number (value);
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return isNaN (v) ? value : v;
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};
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var expand = function (o, str, options, cb){
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if (!options.variables || !str) return cb (null, str);
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var stack = [];
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var c;
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var cp;
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var key = "";
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var section = null;
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var v;
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var holder;
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var t;
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var n;
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for (var i=0; i<str.length; i++){
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c = str[i];
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if (cp === "$" && c === "{"){
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key = key.substring (0, key.length - 1);
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stack.push ({
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key: key,
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section: section
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});
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key = "";
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section = null;
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continue;
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}else if (stack.length){
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if (options.sections && c === "|"){
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section = key;
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key = "";
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continue;
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}else if (c === "}"){
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holder = section !== null ? searchValue (o, section, true) : o;
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if (!holder){
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return cb (new Error ("The section \"" + section + "\" does not " +
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"exist"));
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}
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v = options.namespaces ? searchValue (holder, key) : holder[key];
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if (v === undefined){
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//Read the external vars
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v = options.namespaces
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? searchValue (options._vars, key)
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: options._vars[key]
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if (v === undefined){
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return cb (new Error ("The property \"" + key + "\" does not " +
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"exist"));
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}
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}
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t = stack.pop ();
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section = t.section;
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key = t.key + (v === null ? "" : v);
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continue;
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}
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}
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cp = c;
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key += c;
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}
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if (stack.length !== 0){
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return cb (new Error ("Malformed variable: " + str));
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}
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cb (null, key);
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};
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var searchValue = function (o, chain, section){
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var n = chain.split (".");
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var str;
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for (var i=0; i<n.length-1; i++){
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str = n[i];
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if (o[str] === undefined) return;
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o = o[str];
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}
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var v = o[n[n.length - 1]];
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if (section){
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if (typeof v !== "object") return;
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return v;
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}else{
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if (typeof v === "object") return;
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return v;
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}
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};
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var namespaceKey = function (o, key, value){
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var n = key.split (".");
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var str;
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for (var i=0; i<n.length-1; i++){
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str = n[i];
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if (o[str] === undefined){
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o[str] = {};
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}else if (typeof o[str] !== "object"){
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throw new Error ("Invalid namespace chain in the property name '" +
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key + "' ('" + str + "' has already a value)");
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}
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o = o[str];
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}
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o[n[n.length - 1]] = value;
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};
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var namespaceSection = function (o, section){
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var n = section.split (".");
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var str;
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for (var i=0; i<n.length; i++){
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str = n[i];
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if (o[str] === undefined){
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o[str] = {};
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}else if (typeof o[str] !== "object"){
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throw new Error ("Invalid namespace chain in the section name '" +
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section + "' ('" + str + "' has already a value)");
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}
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o = o[str];
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}
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return o;
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};
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var merge = function (o1, o2){
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for (var p in o2){
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try{
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if (o1[p].constructor === Object){
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o1[p] = merge (o1[p], o2[p]);
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}else{
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o1[p] = o2[p];
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}
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}catch (e){
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o1[p] = o2[p];
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}
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}
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return o1;
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}
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var build = function (data, options, dirname, cb){
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var o = {};
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if (options.namespaces){
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var n = {};
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}
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var control = {
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abort: false,
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skipSection: false
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};
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if (options.include){
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var remainingIncluded = 0;
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var include = function (value){
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if (currentSection !== null){
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return abort (new Error ("Cannot include files from inside a " +
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"section: " + currentSection));
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}
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var p = path.resolve (dirname, value);
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if (options._included[p]) return;
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options._included[p] = true;
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remainingIncluded++;
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control.pause = true;
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read (p, options, function (error, included){
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if (error) return abort (error);
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remainingIncluded--;
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merge (options.namespaces ? n : o, included);
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control.pause = false;
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if (!control.parsed){
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parse (data, options, handlers, control);
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if (control.error) return abort (control.error);
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}
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if (!remainingIncluded) cb (null, options.namespaces ? n : o);
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});
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};
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}
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if (!data){
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if (cb) return cb (null, o);
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return o;
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}
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var currentSection = null;
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var currentSectionStr = null;
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var abort = function (error){
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control.abort = true;
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if (cb) return cb (error);
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throw error;
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};
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var handlers = {};
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var reviver = {
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assert: function (){
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return this.isProperty ? reviverLine.value : true;
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}
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};
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var reviverLine = {};
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//Line handler
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//For speed reasons, if namespaces are enabled the old object is still
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//populated, e.g.: ${a.b} reads the "a.b" property from { "a.b": 1 }, instead
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//of having a unique object { a: { b: 1 } } which is slower to search for
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//the "a.b" value
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//If "a.b" is not found, then the external vars are read. If "namespaces" is
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//enabled the var "a.b" is split and it searches for a.b. If it is not enabled
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//then the var "a.b" searches for "a.b"
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var line;
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var error;
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if (options.reviver){
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if (options.sections){
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line = function (key, value){
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if (options.include && key === INCLUDE_KEY) return include (value);
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reviverLine.value = value;
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reviver.isProperty = true;
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reviver.isSection = false;
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value = options.reviver.call (reviver, key, value, currentSectionStr);
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if (value !== undefined){
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if (options.namespaces){
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try{
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namespaceKey (currentSection === null ? n : currentSection,
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key, value);
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}catch (error){
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abort (error);
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}
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}else{
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if (currentSection === null) o[key] = value;
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else currentSection[key] = value;
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}
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}
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};
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}else{
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line = function (key, value){
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if (options.include && key === INCLUDE_KEY) return include (value);
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reviverLine.value = value;
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reviver.isProperty = true;
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reviver.isSection = false;
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value = options.reviver.call (reviver, key, value);
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if (value !== undefined){
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if (options.namespaces){
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try{
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namespaceKey (n, key, value);
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}catch (error){
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abort (error);
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}
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}else{
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o[key] = value;
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}
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}
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};
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}
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}else{
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if (options.sections){
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line = function (key, value){
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if (options.include && key === INCLUDE_KEY) return include (value);
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if (options.namespaces){
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try{
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namespaceKey (currentSection === null ? n : currentSection, key,
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value);
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}catch (error){
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abort (error);
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}
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}else{
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if (currentSection === null) o[key] = value;
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else currentSection[key] = value;
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}
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};
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}else{
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line = function (key, value){
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if (options.include && key === INCLUDE_KEY) return include (value);
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if (options.namespaces){
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try{
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namespaceKey (n, key, value);
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}catch (error){
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abort (error);
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}
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}else{
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o[key] = value;
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}
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};
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}
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}
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//Section handler
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var section;
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if (options.sections){
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if (options.reviver){
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section = function (section){
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currentSectionStr = section;
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reviverLine.section = section;
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reviver.isProperty = false;
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reviver.isSection = true;
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var add = options.reviver.call (reviver, null, null, section);
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if (add){
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if (options.namespaces){
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try{
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currentSection = namespaceSection (n, section);
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}catch (error){
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abort (error);
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}
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}else{
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currentSection = o[section] = {};
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}
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}else{
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control.skipSection = true;
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}
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};
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}else{
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section = function (section){
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currentSectionStr = section;
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if (options.namespaces){
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try{
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currentSection = namespaceSection (n, section);
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}catch (error){
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abort (error);
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}
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}else{
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currentSection = o[section] = {};
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}
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};
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}
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}
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//Variables
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if (options.variables){
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handlers.line = function (key, value){
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expand (options.namespaces ? n : o, key, options, function (error, key){
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if (error) return abort (error);
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expand (options.namespaces ? n : o, value, options,
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function (error, value){
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if (error) return abort (error);
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line (key, cast (value || null));
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});
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});
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};
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if (options.sections){
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handlers.section = function (s){
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expand (options.namespaces ? n : o, s, options, function (error, s){
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if (error) return abort (error);
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section (s);
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});
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};
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}
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}else{
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handlers.line = function (key, value){
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line (key, cast (value || null));
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};
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if (options.sections){
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handlers.section = section;
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}
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}
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parse (data, options, handlers, control);
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if (control.error) return abort (control.error);
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if (control.abort || control.pause) return;
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if (cb) return cb (null, options.namespaces ? n : o);
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return options.namespaces ? n : o;
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};
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var read = function (f, options, cb){
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fs.stat (f, function (error, stats){
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if (error) return cb (error);
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var dirname;
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if (stats.isDirectory ()){
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dirname = f;
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f = path.join (f, INDEX_FILE);
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}else{
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dirname = path.dirname (f);
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}
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fs.readFile (f, { encoding: "utf8" }, function (error, data){
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if (error) return cb (error);
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build (data, options, dirname, cb);
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});
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});
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};
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module.exports = function (data, options, cb){
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if (typeof options === "function"){
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cb = options;
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options = {};
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}
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options = options || {};
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var code;
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if (options.include){
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if (!cb) throw new Error ("A callback must be passed if the 'include' " +
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"option is enabled");
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options._included = {};
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}
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options = options || {};
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options._strict = options.strict && (options.comments || options.separators);
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options._vars = options.vars || {};
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var comments = options.comments || [];
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if (!Array.isArray (comments)) comments = [comments];
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var c = {};
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comments.forEach (function (comment){
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code = comment.charCodeAt (0);
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if (comment.length > 1 || code < 33 || code > 126){
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throw new Error ("The comment token must be a single printable ASCII " +
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"character");
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}
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c[comment] = true;
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});
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options._comments = c;
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var separators = options.separators || [];
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if (!Array.isArray (separators)) separators = [separators];
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var s = {};
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separators.forEach (function (separator){
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code = separator.charCodeAt (0);
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if (separator.length > 1 || code < 33 || code > 126){
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throw new Error ("The separator token must be a single printable ASCII " +
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"character");
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}
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s[separator] = true;
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});
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options._separators = s;
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if (options.path){
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if (!cb) throw new Error ("A callback must be passed if the 'path' " +
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"option is enabled");
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if (options.include){
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read (data, options, cb);
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}else{
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fs.readFile (data, { encoding: "utf8" }, function (error, data){
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if (error) return cb (error);
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build (data, options, ".", cb);
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});
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}
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}else{
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return build (data, options, ".", cb);
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}
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}; |