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var _ = require("lodash");
var Q = require("q");
var npmi = require('npmi');
var npm = require('npm');
var semver = require('semver');
var Plugin = require("./plugin");
var pkg = require("../package.json");
var initNPM = _.memoize(function() {
return Q.nfcall(npm.load, { silent: true, loglevel: 'silent' });
});
var PluginsList = function(book, plugins) {
this.book = book;
this.log = this.book.log;
// List of Plugin objects
this.list = [];
// List of names of failed plugins
this.failed = [];
// Namespaces
this.namespaces = _.chain(["website", "ebook"])
.map(function(namespace) {
return [
namespace,
{
html: {},
resources: _.chain(Plugin.RESOURCES)
.map(function(type) {
return [type, []];
})
.object()
.value()
}
];
})
.object()
.value();
// Bind methods
_.bindAll(this);
if (plugins) this.load(plugins);
};
// return count of plugins
PluginsList.prototype.count = function() {
return this.list.length;
};
// Add and load a plugin
PluginsList.prototype.load = function(plugin, options) {
var that = this;
if (_.isArray(plugin)) {
return _.reduce(plugin, function(prev, p) {
return prev.then(function() {
return that.load(p);
});
}, Q());
}
if (_.isObject(plugin) && !(plugin instanceof Plugin)) plugin = plugin.name;
if (_.isString(plugin)) plugin = new Plugin(this.book, plugin);
that.log.info("load plugin", plugin.name, "....");
if (!plugin.isValid()) {
that.log.info.fail();
that.failed.push(plugin.name);
return Q();
} else {
that.log.info.ok();
// Push in the list
that.list.push(plugin);
}
// Extract filters
_.each(plugin.getFilters(), function(filterFunc, filterName) {
that.book.template.addFilter(filterName, filterFunc);
});
// Extract blocks
_.each(plugin.getBlocks(), function(block, blockName) {
that.book.template.addBlock(blockName, block);
});
return _.reduce(_.keys(that.namespaces), function(prev, namespaceName) {
return prev.then(function() {
return plugin.getResources(namespaceName)
.then(function(plResources) {
var namespace = that.namespaces[namespaceName];
// Extract js and css
_.each(Plugin.RESOURCES, function(resourceType) {
namespace.resources[resourceType] = (namespace.resources[resourceType] || []).concat(plResources[resourceType] || []);
});
// Map of html resources by name added by each plugin
_.each(plResources.html || {}, function(value, tag) {
// Turn into function if not one already
if (!_.isFunction(value)) value = _.constant(value);
namespace.html[tag] = namespace.html[tag] || [];
namespace.html[tag].push(value);
});
})
});
}, Q());
};
// Call a hook
PluginsList.prototype.hook = function(name, data) {
return _.reduce(this.list, function(prev, plugin) {
return prev.then(function(ret) {
return plugin.callHook(name, ret);
});
}, Q(data));
};
// Return a template from a plugin
PluginsList.prototype.template = function(name) {
var withTpl = _.find(this.list, function(plugin) {
return (
plugin.infos.templates &&
plugin.infos.templates[name]
);
});
if (!withTpl) return null;
return withTpl.resolveFile(withTpl.infos.templates[name]);
};
// Return an html snippet
PluginsList.prototype.html = function(namespace, tag, context, options) {
var htmlSnippets = this.namespaces[namespace].html[tag];
return _.map(htmlSnippets || [], function(code) {
return code.call(context, options);
}).join("\n");
};
// Return a resources map for a namespace
PluginsList.prototype.resources = function(namespace) {
return this.namespaces[namespace].resources;
};
// Install plugins from a book
PluginsList.prototype.install = function() {
var that = this;
var defaultsPlugins = _.pluck(that.book.options.defaultsPlugins)
// Remove defaults (no need to install)
var plugins = _.filter(that.book.options.plugins, function(plugin) {
return !_.contains(defaultsPlugins, plugin.name);
});
// Install plugins one by one
that.book.log.info.ln(plugins.length+" plugins to install");
return _.reduce(plugins, function(prev, plugin) {
return prev.then(function() {
var fullname = "gitbook-plugin-"+plugin.name;
return Q()
// Resolve version if needed
.then(function() {
if (plugin.version) return plugin.version;
that.book.log.info.ln("No version specified, resolve plugin", plugin.name);
return initNPM()
.then(function() {
return Q.nfcall(npm.commands.view, [fullname+"@>=0.0.0", "engines"], true);
})
.then(function(versions) {
return _.chain(versions)
.pairs()
.map(function(v) {
return {
version: v[0],
gitbook: (v[1].engines || {})["gitbook"]
}
})
.filter(function(v) {
return v.gitbook && semver.satisfies(pkg.version, v.gitbook);
})
.sort(function(v1, v2) {
return semver.lt(v1.version, v2.version)? 1 : -1;
})
.pluck("version")
.first()
.value();
});
})
// Install the plugin with the resolved version
.then(function(version) {
if (!version) {
throw "Found no satisfactory version for plugin "+plugin.name;
}
that.book.log.info.ln("install plugin", plugin.name, "from npm ("+fullname+") with version", version);
return Q.nfcall(npmi, {
'name': fullname,
'version': version,
'path': that.book.root,
'npmLoad': {
'loglevel': 'silent',
'loaded': true,
'prefix': that.book.root
}
});
})
.then(function() {
that.book.log.info.ok("plugin", plugin.name, "installed with success");
});
});
}, Q());
};
module.exports = PluginsList;
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