From 7b0eaa806f2cfc84e4c26f8f608e1d4e4843ea05 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Yaroslav=20de=20la=20Pe=C3=B1a=20Smirnov?=
 <yps@yaroslavps.com>
Date: Sun, 28 Nov 2021 04:37:59 +0300
Subject: Clean out old files/dirs

Delete extraneous files/images/albums that are no longer present in the
source directory.
---
 include/components.h |  3 +++
 include/fs.h         | 24 +++++++++++++++++++++---
 include/render.h     |  3 +++
 include/site.h       |  3 ++-
 4 files changed, 29 insertions(+), 4 deletions(-)

(limited to 'include')

diff --git a/include/components.h b/include/components.h
index c56de77..e65a66a 100644
--- a/include/components.h
+++ b/include/components.h
@@ -57,11 +57,14 @@ struct album {
 	/* The date of the album is the date of the earliest image */
 	time_t tstamp;
 	struct bstree *images;
+	/* Files/dirs that belong to images and which shouldn't be deleted */
+	struct hashmap *preserved;
 	/* Hashmap with values to be passed to the template */
 	struct hashmap *map;
 	/* Vector with hashmaps of images to be passed to the templates */
 	struct vector *thumbs;
 	struct vector *previews;
+	size_t images_updated;
 };
 
 struct image *image_new(char *src, const struct stat *, struct album *);
diff --git a/include/fs.h b/include/fs.h
index 973d585..218958b 100644
--- a/include/fs.h
+++ b/include/fs.h
@@ -1,10 +1,17 @@
 #ifndef REVELA_FS_H
 #define REVELA_FS_H
 
-#include <stdio.h>
 #include <stdbool.h>
 #include <sys/stat.h>
 
+#include "hashmap.h"
+
+enum nmkdir_res {
+	NMKDIR_ERROR,
+	NMKDIR_NOOP,
+	NMKDIR_CREATED,
+};
+
 /* 
  * Returns a pointer to where the basename of the file is inside path.
  */
@@ -14,7 +21,7 @@ const char *rbasename(const char *path);
  * Makes a new directory if it doesn't exist. If there were errors returns
  * false, otherwise returns true.
  */
-bool nmkdir(const char *path, struct stat *dstat, bool dry);
+enum nmkdir_res nmkdir(const char *path, struct stat *dstat, bool dry);
 
 #define joinpathb(buf, a, b) sprintf(buf, "%s/%s", a, b)
 
@@ -42,6 +49,16 @@ int file_is_uptodate(const char *path, const struct timespec *srcmtim);
  */
 void setdatetime(const char *path, const struct timespec *mtim);
 
+bool rmentry(const char *path);
+
+/* 
+ * Recursively deletes extaneous files from directory, keeping files in the
+ * preserved hashmap. Returns -1 on error, number of deleted entries on success.
+ * The number is not the total number of files on all subdirectories, but only
+ * the number of files/dirs deleted from the directory pointed by path.
+ */
+ssize_t rmextra(const char *path, struct hashmap *preserved);
+
 /* 
  * Copies file(s) truncating and overwritting the file(s) in the destination
  * path if they exist and are not a directory, or creating them if they don't
@@ -49,6 +66,7 @@ void setdatetime(const char *path, const struct timespec *mtim);
  * recursively. Only copies the regular files that already exist if their
  * timestamps do not match.
  */
-bool filesync(const char *restrict srcpath, const char *restrict dstpath);
+bool filesync(const char *restrict srcpath, const char *restrict dstpath,
+		struct hashmap *preserved);
 
 #endif
diff --git a/include/render.h b/include/render.h
index faa6f73..ff83bab 100644
--- a/include/render.h
+++ b/include/render.h
@@ -19,6 +19,7 @@ struct render {
 	struct hashmap *common_vars;
 	/* Modification time for the templates dir */
 	struct timespec modtime;
+	size_t albums_updated;
 	bool dry_run;
 };
 
@@ -30,6 +31,8 @@ bool render_make_album(struct render *r, const char *path,
 bool render_make_image(struct render *r, const char *path,
 		const struct image *image);
 
+bool render_set_album_vars(struct render *, struct album *);
+
 bool render_init(struct render *, const char *path, struct site_config *,
 		struct bstree *albums);
 
diff --git a/include/site.h b/include/site.h
index 678cd47..6ddac82 100644
--- a/include/site.h
+++ b/include/site.h
@@ -12,7 +12,6 @@
 #define SITE_DEFAULT_RESOURCES "/usr/share/revela"
 #endif
 
-#define CSSDIR "css"
 #define STATICDIR "static"
 #define CONTENTDIR "content"
 #define TEMPLATESDIR "templates"
@@ -31,6 +30,8 @@ struct site {
 	 */
 	size_t rel_content_dir;
 	struct bstree *albums;
+	/* Files/dirs that belong to albums and which shouldn't be deleted */
+	struct hashmap *album_dirs;
 	struct render render;
 	bool dry_run;
 };
-- 
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