1 files changed, 79 insertions, 0 deletions
diff --git a/packages/gitbook/src/output/generatePage.js b/packages/gitbook/src/output/generatePage.js
new file mode 100644
index 0000000..0fc99a3
--- /dev/null
+++ b/packages/gitbook/src/output/generatePage.js
@@ -0,0 +1,79 @@
+const path = require('path');
+
+const Promise = require('../utils/promise');
+const error = require('../utils/error');
+const timing = require('../utils/timing');
+
+const Templating = require('../templating');
+const JSONUtils = require('../json');
+const createTemplateEngine = require('./createTemplateEngine');
+const callPageHook = require('./callPageHook');
+
+/**
+ * Prepare and generate HTML for a page
+ *
+ * @param {Output} output
+ * @param {Page} page
+ * @return {Promise<Page>}
+ */
+function generatePage(output, page) {
+    const book = output.getBook();
+    const engine = createTemplateEngine(output);
+
+    return timing.measure(
+        'page.generate',
+        Promise(page)
+        .then(function(resultPage) {
+            const file = resultPage.getFile();
+            const filePath = file.getPath();
+            const parser = file.getParser();
+            const context = JSONUtils.encodeOutputWithPage(output, resultPage);
+
+            if (!parser) {
+                return Promise.reject(error.FileNotParsableError({
+                    filename: filePath
+                }));
+            }
+
+            // Call hook "page:before"
+            return callPageHook('page:before', output, resultPage)
+
+            // Escape code blocks with raw tags
+            .then(function(currentPage) {
+                return parser.preparePage(currentPage.getContent());
+            })
+
+            // Render templating syntax
+            .then(function(content) {
+                const absoluteFilePath = path.join(book.getContentRoot(), filePath);
+                return Templating.render(engine, absoluteFilePath, content, context);
+            })
+
+            .then(function(output) {
+                const content = output.getContent();
+
+                return parser.parsePage(content)
+                .then(function(result) {
+                    return output.setContent(result.content);
+                });
+            })
+
+            // Post processing for templating syntax
+            .then(function(output) {
+                return Templating.postRender(engine, output);
+            })
+
+            // Return new page
+            .then(function(content) {
+                return resultPage.set('content', content);
+            })
+
+            // Call final hook
+            .then(function(currentPage) {
+                return callPageHook('page', output, currentPage);
+            });
+        })
+    );
+}
+
+module.exports = generatePage;