Add base for normalizing html

3 files changed, 65 insertions, 1 deletions

diff --git a/lib/utils/command.js b/lib/utils/command.js
index f395fa1..4269d6c 100644
--- a/lib/utils/command.js
+++ b/lib/utils/command.js
@@ -13,7 +13,32 @@ function exec(command, options) {
     return Promise.nfcall(childProcess.exec, command, options);
 }
 
+// Spawn an executable
+function spawn(command, args, options) {
+    if (!isAvailable) {
+        return Promise.reject(new Error('Command execution is not possible on this platform'));
+    }
+
+    var d = Promise.deferred();
+    var child = childProcess.spawn(command, args, options);
+
+    child.on('error', function(error) {
+        return d.reject(error);
+    });
+
+    child.on('close', function(code) {
+        if (code === 0) {
+            d.resolve();
+        } else {
+            d.reject(new Error('Error with command "'+command+'"'));
+        }
+    });
+
+    return d.promise;
+}
+
 module.exports = {
     isAvailable: isAvailable,
-    exec: exec
+    exec: exec,
+    spawn: spawn
 };
diff --git a/lib/utils/images.js b/lib/utils/images.js
new file mode 100644
index 0000000..3ba0f1f
--- /dev/null
+++ b/lib/utils/images.js
@@ -0,0 +1,27 @@
+var fs = require('fs');
+
+var Promise = require('./promise');
+var command = require('./command');
+var error = require('./error');
+
+// Convert a svg file to a pmg
+function convertSVGToPNG(source, dest, options) {
+    if (!command.isAvailable) return Promise.reject(new Error('Could not convert SVG in this platform'));
+    if (!fs.existsSync(source)) return Promise.reject(new error.FileNotFoundError({ filename: source }));
+
+    return command.spawn('svgexport', [source, dest])
+    .fail(function(err) {
+        if (err.code == 'ENOENT') err = new Error('Need to install "svgexport" using "npm install svgexport -g"');
+        throw err;
+    })
+    .then(function() {
+        if (fs.existsSync(dest)) return;
+
+        throw new Error('Error converting '+source+' into '+dest);
+    });
+}
+
+module.exports = {
+    convertSVGToPNG: convertSVGToPNG,
+    INVALID: ['.svg']
+};
\ No newline at end of file
diff --git a/lib/utils/promise.js b/lib/utils/promise.js
index 82f4a60..adcc1c3 100644
--- a/lib/utils/promise.js
+++ b/lib/utils/promise.js
@@ -32,7 +32,19 @@ function some(arr, iter) {
     }, Q());
 }
 
+// Map an array using an async (promised) iterator
+function map(arr, iter) {
+    return reduce(arr, function(prev, entry, i) {
+        return Q(iter(entry, i))
+        .then(function(out) {
+            prev.push(out);
+            return prev;
+        });
+    }, []);
+}
+
 module.exports = Q;
 module.exports.reduce = reduce;
+module.exports.map = map;
 module.exports.serie = serie;
 module.exports.some = some;