Add base plugin object and test validation of plugin

2 files changed, 31 insertions, 1 deletions

diff --git a/lib/generate/index.js b/lib/generate/index.js
index 33edc1f..f0e945f 100644
--- a/lib/generate/index.js
+++ b/lib/generate/index.js
@@ -6,6 +6,7 @@ var tmp = require('tmp');
 
 var fs = require("./fs");
 var parse = require("../parse");
+var Plugin = require("./plugin");
 
 var generators = {
     "site": require("./site"),
@@ -234,5 +235,6 @@ var generateFile = function(options) {
 module.exports = {
     generators: generators,
     folder: generate,
-    file: generateFile
+    file: generateFile,
+    Plugin: Plugin
 };
diff --git a/lib/generate/plugin.js b/lib/generate/plugin.js
new file mode 100644
index 0000000..bc131c6
--- /dev/null
+++ b/lib/generate/plugin.js
@@ -0,0 +1,28 @@
+var semver = require("semver");
+var fs = require("./fs");
+
+var pkg = require("../../package.json");
+
+var Plugin = function(name) {
+    this.name = name;
+    this.packageInfos = {};
+
+    try {
+        this.packageInfos = require(name+"/package.json");
+    } catch (e) {
+        this.packageInfos = {};
+    }
+};
+
+// Test if it's a valid plugin
+Plugin.prototype.isValid = function() {
+    return (
+        this.packageInfos
+        && this.packageInfos.name
+        && this.packageInfos.engines
+        && this.packageInfos.engines.gitbook
+        && semver.satisfies(pkg.version, this.packageInfos.engines.gitbook)
+    );
+};
+
+module.exports = Plugin;
\ No newline at end of file