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var _ = require("lodash");
var Q = require("q");
var semver = require("semver");
var path = require("path");
var url = require("url");
var fs = require("./utils/fs");
var resolve = require('resolve');
var pkg = require("../package.json");
var Plugin = function(book, name) {
this.book = book;
this.name = name;
this.packageInfos = {};
this.infos = {};
// Bind methods
_.bindAll(this);
_.each([
"gitbook-plugin-"+name,
"gitbook-"+name,
name,
], function(_name) {
if (this.load(_name, __dirname)) return false;
if (this.load(_name, book.root)) return false;
}, this);
};
// Type of plugins resources
Plugin.RESOURCES = ["js", "css"];
Plugin.HOOKS = [
"init", "finish"
]
// Load from a name
Plugin.prototype.load = function(name, baseDir) {
try {
var res = resolve.sync(name+"/package.json", { basedir: baseDir });
this.baseDir = path.dirname(res);
this.packageInfos = require(res);
this.infos = require(resolve.sync(name, { basedir: baseDir }));
this.name = name;
return true;
} catch (e) {
return false;
}
};
Plugin.prototype.normalizeResource = function(resource) {
// Parse the resource path
var parsed = url.parse(resource);
// This is a remote resource
// so we will simply link to using it's URL
if (parsed.protocol) {
return {
"url": resource
};
}
// This will be copied over from disk
// and shipped with the book's build
return { "path": this.name+"/"+resource };
};
// Return resources
Plugin.prototype._getResources = function(base) {
base = base;
var book = this.infos[base];
// Compatibility with version 1.x.x
if (base == "website") book = book || this.infos["book"];
// Nothing specified, fallback to default
if (!book) {
return Q({});
}
// Dynamic function
if(typeof book === "function") {
// Call giving it the context of our book
return Q().then(book.bind(this.book));
}
// Plain data object
return Q(_.cloneDeep(book));
};
// Normalize resources and return them
Plugin.prototype.getResources = function(base) {
var that = this;
return this._getResources(base)
.then(function(resources) {
_.each(Plugin.RESOURCES, function(resourceType) {
resources[resourceType] = (resources[resourceType] || []).map(that.normalizeResource);
});
return resources;
});
};
// Normalize filters and return them
Plugin.prototype.getFilters = function() {
return this.infos.filters || {};
};
// Normalize blocks and return them
Plugin.prototype.getBlocks = function() {
return this.infos.blocks || {};
};
// Test if it's a valid plugin
Plugin.prototype.isValid = function() {
var that = this;
var isValid = (
this.packageInfos &&
this.packageInfos.name &&
this.packageInfos.engines &&
this.packageInfos.engines.gitbook &&
semver.satisfies(pkg.version, this.packageInfos.engines.gitbook)
);
// Valid hooks
_.each(this.infos.hooks, function(hook, hookName) {
if (_.contains(Plugin.HOOKS, hookName)) return;
that.book.log.warn.ln("Hook '"+hookName+" 'used by plugin '"+that.packageInfos.name+"' has been removed or is deprecated");
});
return isValid;
};
// Resolve file path
Plugin.prototype.resolveFile = function(filename) {
return path.resolve(this.baseDir, filename);
};
// Resolve file path
Plugin.prototype.callHook = function(name, data) {
// Our book will be the context to apply
var context = this.book;
var hookFunc = this.infos.hooks? this.infos.hooks[name] : null;
data = data || {};
if (!hookFunc) return Q(data);
this.book.log.debug.ln("call hook", name);
if (!_.contains(Plugin.HOOKS, name)) this.book.log.warn.ln("hook '"+name+"' used by plugin '"+this.name+"' is deprecated, and will be remove in the coming versions");
return Q()
.then(function() {
return hookFunc.apply(context, [data]);
});
};
// Copy plugin assets fodler
Plugin.prototype.copyAssets = function(out, base) {
var that = this;
return this.getResources(base)
.get('assets')
.then(function(assets) {
// Assets are undefined
if(!assets) return false;
return fs.copy(
that.resolveFile(assets),
out
).then(_.constant(true));
}, _.constant(false));
};
module.exports = Plugin;
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