1 files changed, 132 insertions, 0 deletions
diff --git a/lib/config/index.js b/lib/config/index.js
new file mode 100644
index 0000000..7f75733
--- /dev/null
+++ b/lib/config/index.js
@@ -0,0 +1,132 @@
+var _ = require('lodash');
+var semver = require('semver');
+
+var gitbook = require('../gitbook');
+var Promise = require('../utils/promise');
+var validator = require('./validator');
+var plugins = require('./plugins');
+
+// Config files to tested (sorted)
+var CONFIG_FILES = [
+    'book.js',
+    'book.json'
+];
+
+/*
+Config is an interface for the book's configuration stored in "book.json" (or "book.js")
+*/
+
+function Config(book, baseConfig) {
+    this.book = book;
+    this.fs = book.fs;
+    this.log = book.log;
+    this.path = '';
+
+    this.baseConfig = baseConfig || {};
+    this.replace({});
+}
+
+// Load configuration of the book
+// and verify that the configuration is satisfying
+Config.prototype.load = function() {
+    var that = this;
+    var isLanguageBook = this.book.isLanguageBook();
+
+    // Try all potential configuration file
+    return Promise.some(CONFIG_FILES, function(filename) {
+        that.log.debug.ln('try loading configuration from', filename);
+
+        return that.fs.loadAsObject(that.book.resolve(filename))
+        .then(function(_config) {
+            that.log.debug.ln('configuration loaded from', filename);
+
+            that.path = filename;
+            return that.replace(_config);
+        })
+        .fail(function(err) {
+            if (err.code != 'MODULE_NOT_FOUND') throw(err);
+            else return Promise(false);
+        });
+    })
+    .then(function() {
+        if (!isLanguageBook) {
+            if (!gitbook.satisfies(that.options.gitbook)) {
+                throw new Error('GitBook version doesn\'t satisfy version required by the book: '+that.options.gitbook);
+            }
+            if (that.options.gitbook != '*' && !semver.satisfies(semver.inc(gitbook.version, 'patch'), that.options.gitbook)) {
+                that.log.warn.ln('gitbook version specified in your book.json might be too strict for future patches, \''+(_.first(gitbook.version.split('.'))+'.x.x')+'\' is more adequate');
+            }
+
+            that.options.plugins = plugins.toList(that.options.plugins);
+        } else {
+            // Multilingual book should inherits the plugins list from parent
+            that.options.plugins = that.book.parent.config.get('plugins');
+        }
+
+        that.options.gitbook = gitbook.version;
+    });
+};
+
+// Replace the whole configuration
+Config.prototype.replace = function(options) {
+    var that = this;
+
+    // Extend base config
+    options = _.defaults(_.cloneDeep(options), this.baseConfig);
+
+    // Validate the config
+    this.options = validator.validate(options);
+
+    // options.input == book.root
+    Object.defineProperty(this.options, 'input', {
+        get: function () {
+            return that.book.root;
+        }
+    });
+
+    // options.originalInput == book.parent.root
+    Object.defineProperty(this.options, 'originalInput', {
+        get: function () {
+            return that.book.parent? that.book.parent.root : undefined;
+        }
+    });
+};
+
+// Return true if book has a configuration file
+Config.prototype.exists = function() {
+    return Boolean(this.path);
+};
+
+// Return path to a structure file
+// Strip the extension by default
+Config.prototype.getStructure = function(name, dontStripExt) {
+    var filename = this.options.structure[name];
+    if (dontStripExt) return filename;
+
+    filename = filename.split('.').slice(0, -1).join('.');
+    return filename;
+};
+
+// Return a configuration using a key and a default value
+Config.prototype.get = function(key, def) {
+    return _.get(this.options, key, def);
+};
+
+// Update a configuration
+Config.prototype.set = function(key, value) {
+    return _.set(this.options, key, value);
+};
+
+// Return a dump of the configuration
+Config.prototype.dump = function() {
+    return _.cloneDeep(this.options);
+};
+
+// Return templating context
+Config.prototype.getContext = function() {
+    return {
+        config: this.book.config.dump()
+    };
+};
+
+module.exports = Config;