1 files changed, 51 insertions, 0 deletions
diff --git a/src/pyssg/rss.py b/src/pyssg/rss.py
new file mode 100644
index 0000000..07776e1
--- /dev/null
+++ b/src/pyssg/rss.py
@@ -0,0 +1,51 @@
+import os
+import importlib.metadata
+from datetime import datetime, timezone
+
+from .page import Page
+from .configuration import Configuration
+
+
+VERSION = importlib.metadata.version('pyssg')
+DFORMAT = '%a, %d %b %Y %H:%M:%S %Z'
+
+
+class RSSBuilder:
+    def __init__(self, config: Configuration,
+                 template: str,
+                 pages: list[Page]):
+        self.rss: str = template
+        self.pages: list[Page] = pages
+
+
+    def build(self):
+        # initial base replacements
+        self.rss = self.rss.replace('$$TITLE', config.title)
+        self.rss = self.rss.replace('$$LINK', config.base_url)
+        self.rss = self.rss.replace('$$PYSSGVERSION', VERSION)
+        items_formatted: str = __get_items_formatted()
+        self.rss = self.rss.replace('$$ITEMS', items_formatted)
+
+        current_date: str = datetime.now(tz=timezone.utc).strftime(DFORMAT)
+        self.rss = self.rss.replace('$$CURRENTDATE', current_date)
+
+        with open(os.path.join(config.dst, 'rss.xml'), 'w') as f:
+            f.write(self.rss)
+
+
+    def __get_items_formatted(self) -> str:
+        # i_f=items formatted for short
+        i_f: str = ''
+        for p in pages:
+            url: str = f'{config.base_url}/{p.name.replace(".md", ".html")}'
+            date: str = p.c_datetime.strftime(DFORMAT)
+
+            i_f = f'{i_f}    <item>\n'
+            i_f = f'{i_f}      <title>{p.title}</title>\n'
+            i_f = f'{i_f}      <link>{url}</link>\n'
+            i_f = f'{i_f}      <description>{p.summary}</description>\n'
+            i_f = f'{i_f}      <guid isPermaLink="true">{url}</guid>\n'
+            i_f = f'{i_f}      <pubDate>{date}</pubDate>\n'
+            i_f = f'{i_f}    </item>\n'
+
+        return i_f