From d7426722388070a38984801544cb3d7df2f33c15 Mon Sep 17 00:00:00 2001
From: Petr Sloup <slouppetr@gmail.com>
Date: Fri, 11 Mar 2016 09:48:35 +0100
Subject: [PATCH] Serve fonts

---
 src/serve_font.js  | 42 ++++++++++++++++++++++++++++++++++++++++++
 src/serve_style.js | 16 +++++++++++++++-
 src/server.js      | 13 +++++++++++--
 3 files changed, 68 insertions(+), 3 deletions(-)
 create mode 100644 src/serve_font.js

diff --git a/src/serve_font.js b/src/serve_font.js
new file mode 100644
index 0000000..bcd86ee
--- /dev/null
+++ b/src/serve_font.js
@@ -0,0 +1,42 @@
+'use strict';
+
+var path = require('path'),
+    fs = require('fs');
+
+var clone = require('clone'),
+    express = require('express');
+
+
+module.exports = function(fontPath, allowedFonts) {
+  var app = express().disable('x-powered-by');
+
+  var rootPath = path.join(process.cwd(), fontPath || '');
+
+  app.get('/fonts/:fontstack/:range([\\d]+-[\\d]+).pbf',
+      function(req, res, next) {
+    var fontstack = decodeURI(req.params.fontstack);
+    var range = req.params.range;
+
+    var fonts = fontstack.split(',');
+    if (fonts.length == 1) {
+      if (allowedFonts[fonts[0]]) {
+        var filename = rootPath + '/' + fonts[0] + '/' + range + '.pbf';
+        return fs.readFile(filename, function(err, data) {
+          if (err) {
+            console.log('Font load error:', filename);
+            return res.status(404).send('File not found');
+          } else {
+            res.header('Content-type', 'application/x-protobuf');
+            return res.send(data);
+          }
+        });
+      } else {
+        return res.status(403).send('Forbidden');
+      }
+    } else {
+      return res.status(501).send('Not Yet Implemented');
+    }
+  });
+
+  return app;
+};
diff --git a/src/serve_style.js b/src/serve_style.js
index b6603df..c2fbad1 100644
--- a/src/serve_style.js
+++ b/src/serve_style.js
@@ -7,7 +7,7 @@ var clone = require('clone'),
     express = require('express');
 
 
-module.exports = function(repo, options, id, reportVector) {
+module.exports = function(repo, options, id, reportVector, reportFont) {
   var app = express().disable('x-powered-by');
 
   var rootPath = path.join(process.cwd(), options.root || '');
@@ -25,6 +25,20 @@ module.exports = function(repo, options, id, reportVector) {
     }
   });
 
+  var findFontReferences = function(obj) {
+    Object.keys(obj).forEach(function(key) {
+      var value = obj[key];
+      if (key == 'text-font') {
+        if (value && value.length > 0) {
+          value.forEach(reportFont);
+        }
+      } else if (value && typeof value == 'object') {
+        findFontReferences(value);
+      }
+    });
+  };
+  styleJSON.layers.forEach(findFontReferences);
+
   var spritePath = path.join(rootPath, styleJSON.sprite);
 
   styleJSON.sprite = 'local://styles/' + id + '/sprite';
diff --git a/src/server.js b/src/server.js
index 580f58f..c373632 100644
--- a/src/server.js
+++ b/src/server.js
@@ -12,7 +12,8 @@ var clone = require('clone'),
     express = require('express'),
     morgan = require('morgan');
 
-var serve_raster = require('./serve_raster'),
+var serve_font = require('./serve_font'),
+    serve_raster = require('./serve_raster'),
     serve_style = require('./serve_style'),
     serve_vector = require('./serve_vector'),
     utils = require('./utils');
@@ -22,7 +23,11 @@ module.exports = function(opts, callback) {
       serving = {
         styles: {},
         raster: {},
-        vector: {}
+        vector: {},
+        fonts: { // default fonts, always expose these (if they exist)
+          'Open Sans Regular': true,
+          'Arial Unicode MS Regular': true
+        }
       };
 
   app.enable('trust proxy');
@@ -65,6 +70,8 @@ module.exports = function(opts, callback) {
             };
             return id;
           }
+        }, function(font) {
+          serving.fonts[font] = true;
         }));
     }
     if (item.raster !== false) {
@@ -72,6 +79,8 @@ module.exports = function(opts, callback) {
     }
   });
 
+  app.use('/', serve_font('glyphs', serving.fonts));
+
   //TODO: cors
 
   Object.keys(vector).forEach(function(id) {