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exports.isClient = typeof global != "object";
if (!exports.isClient) {
var npm = require("npm/lib/npm.js");
var readInstalled = require("npm/lib/utils/read-installed.js");
var relativize = require("npm/lib/utils/relativize.js");
var readJson = require("npm/lib/utils/read-json.js");
var path = require("path");
var async = require("async");
var fs = require("fs");
var tsort = require("./tsort");
var util = require("util");
}
exports.prefix = 'ep_';
exports.loaded = false;
exports.plugins = {};
exports.parts = [];
exports.hooks = {};
exports.ensure = function (cb) {
if (!exports.loaded)
exports.update(cb);
else
cb();
}
exports.formatPlugins = function () {
return Object.keys(exports.plugins).join(", ");
}
exports.formatParts = function () {
return exports.parts.map(function (part) { return part.full_name; }).join("\n");
}
exports.formatHooks = function () {
var res = [];
Object.keys(exports.hooks).forEach(function (hook_name) {
exports.hooks[hook_name].forEach(function (hook) {
res.push(hook.hook_name + ": " + hook.hook_fn_name + " from " + hook.part.full_name);
});
});
return res.join("\n");
}
exports.loadFn = function (path) {
var x = path.split(":");
var fn = require(x[0]);
x[1].split(".").forEach(function (name) {
fn = fn[name];
});
return fn;
}
exports.extractHooks = function (parts, hook_set_name) {
var hooks = {};
parts.forEach(function (part) {
Object.keys(part[hook_set_name] || {}).forEach(function (hook_name) {
if (hooks[hook_name] === undefined) hooks[hook_name] = [];
var hook_fn_name = part[hook_set_name][hook_name];
var hook_fn = exports.loadFn(part[hook_set_name][hook_name]);
if (hook_fn) {
hooks[hook_name].push({"hook_name": hook_name, "hook_fn": hook_fn, "hook_fn_name": hook_fn_name, "part": part});
} else {
console.error("Unable to load hook function for " + part.full_name + " for hook " + hook_name + ": " + part.hooks[hook_name]);
}
});
});
return hooks;
}
if (exports.isClient) {
exports.update = function (cb) {
jQuery.getJSON('/pluginfw/plugin-definitions.json', function(data) {
exports.plugins = data.plugins;
exports.parts = data.parts;
exports.hooks = exports.extractHooks(exports.parts, "client_hooks");
exports.loaded = true;
cb();
});
}
} else {
exports.update = function (cb) {
exports.getPackages(function (er, packages) {
var parts = [];
var plugins = {};
// Load plugin metadata ep.json
async.forEach(
Object.keys(packages),
function (plugin_name, cb) {
exports.loadPlugin(packages, plugin_name, plugins, parts, cb);
},
function (err) {
exports.plugins = plugins;
exports.parts = exports.sortParts(parts);
exports.hooks = exports.extractHooks(exports.parts, "hooks");
exports.loaded = true;
cb(err);
}
);
});
}
exports.getPackages = function (cb) {
// Load list of installed NPM packages, flatten it to a list, and filter out only packages with names that
var dir = path.resolve(npm.dir, '..');
readInstalled(dir, function (er, data) {
if (er) cb(er, null);
var packages = {};
function flatten(deps) {
Object.keys(deps).forEach(function (name) {
if (name.indexOf(exports.prefix) == 0) {
packages[name] = deps[name];
}
if (deps[name].dependencies !== undefined)
flatten(deps[name].dependencies);
delete deps[name].dependencies;
});
}
flatten([data]);
cb(null, packages);
});
}
exports.loadPlugin = function (packages, plugin_name, plugins, parts, cb) {
var plugin_path = path.resolve(packages[plugin_name].path, "ep.json");
fs.readFile(
plugin_path,
function (er, data) {
if (er) {
console.error("Unable to load plugin definition file " + plugin_path);
return cb();
}
try {
var plugin = JSON.parse(data);
plugin.package = packages[plugin_name];
plugins[plugin_name] = plugin;
plugin.parts.forEach(function (part) {
part.plugin = plugin_name;
part.full_name = plugin_name + "/" + part.name;
parts[part.full_name] = part;
});
} catch (ex) {
console.error("Unable to parse plugin definition file " + plugin_path + ": " + ex.toString());
}
cb();
}
);
}
exports.partsToParentChildList = function (parts) {
var res = [];
Object.keys(parts).forEach(function (name) {
(parts[name].post || []).forEach(function (child_name) {
res.push([name, child_name]);
});
(parts[name].pre || []).forEach(function (parent_name) {
res.push([parent_name, name]);
});
if (!parts[name].pre && !parts[name].post) {
res.push([name, ":" + name]); // Include apps with no dependency info
}
});
return res;
}
exports.sortParts = function(parts) {
return tsort(
exports.partsToParentChildList(parts)
).filter(
function (name) { return parts[name] !== undefined; }
).map(
function (name) { return parts[name]; }
);
};
}
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