Probably about 1/2 way through now ...

[cocanwiki.git] / scripts / recent.ml

diff --git a/scripts/recent.ml b/scripts/recent.ml
index 997462a..5ae5092 100644 (file)
--- a/scripts/recent.ml
+++ b/scripts/recent.ml
@@ -1,7 +1,7 @@
 (* COCANWIKI - a wiki written in Objective CAML.
  * Written by Richard W.M. Jones <rich@merjis.com>.
  * Copyright (C) 2004 Merjis Ltd.
- * $Id: recent.ml,v 1.8 2004/09/21 13:01:16 rich Exp $
+ * $Id: recent.ml,v 1.11 2006/03/27 18:09:46 rich Exp $
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -28,38 +28,74 @@ open Cocanwiki
 open Cocanwiki_template
 open Cocanwiki_date
 
-let max_age = "3 months"
+let default_offset = 0
+let default_limit = 100
+let max_limit = 1000
 
-let run r (q : cgi) (dbh : Dbi.connection) hostid _ _ =
+let run r (q : cgi) dbh hostid _ _ =
   let template = get_template dbh hostid "recent.html" in
 
+  (* Count the number of changes. *)
+  let sth = dbh#prepare_cached
+    "select count(*)::int4 from pages where hostid = ?" in
+  sth#execute [Some hostid];
+  let count = sth#fetch1int () in
+
+  (* Get the offset and limit specified, and adjust them so that we will
+   * be displaying some changes.
+   *)
+  let offset =
+    try Int32.of_string (q#param "offset") with Not_found -> default_offset in
+  let limit =
+    try Int32.of_string (q#param "limit") with Not_found -> default_limit in
+
+  let limit =
+    if limit < 1 then 1
+    else if limit > max_limit then max_limit
+    else limit in
+  let offset =
+    if offset < 0 then 0
+    else if offset >= count then max 0 (count - limit)
+    else offset in
+
+  template#set "offset" (Int32.to_string offset);
+  template#set "last" (Int32.to_string (min (offset + limit) count - 1));
+  template#set "limit" (Int32.to_string limit);
+  template#set "count" (Int32.to_string count);
+
+  template#conditional "has_next" (offset + limit < count);
+  template#set "next_offset" (Int32.to_string (offset + limit));
+  template#conditional "has_prev" (offset > 0);
+  template#set "prev_offset" (Int32.to_string (max 0 (offset - limit)));
+
+  (* Get the actual changes. *)
   let sth =
     dbh#prepare_cached
       "select p.id, p.url, p.url_deleted, p.title, p.last_modified_date,
               p.logged_ip, u.name
          from pages p left outer join users u on p.logged_user = u.id
         where p.hostid = ?
-          and p.last_modified_date >= current_timestamp - interval ?
-        order by p.last_modified_date desc" in
-  sth#execute [`Int hostid; `String max_age];
+        order by p.last_modified_date desc
+        offset ? limit ?" in
+  sth#execute [Some hostid; Some offset; Some limit];
 
   let table =
     sth#map
       (function
-        | [`Int version; `String url; _; `String title;
+        | [Some version; Some url; _; Some title;
            `Timestamp last_modified_date; logged_ip; logged_user] ->
             let date = printable_date_time last_modified_date in
             let has_logged_ip, logged_ip =
               match logged_ip with
-                  `Null -> false, ""
-                | `String ip -> true, ip
+                  None -> false, ""
+                | Some ip -> true, ip
                 | _ -> assert false in
             let has_logged_user, logged_user =
               match logged_user with
-                  `Null -> false, ""
-                | `String name -> true, name
+                  None -> false, ""
+                | Some name -> true, name
                 | _ -> assert false in
-            [ "version", Template.VarString (string_of_int version);
+            [ "version", Template.VarString (Int32.to_string version);
               "url", Template.VarString url;
               "title", Template.VarString title;
               "last_modified_date", Template.VarString date;
@@ -68,20 +104,20 @@ let run r (q : cgi) (dbh : Dbi.connection) hostid _ _ =
               "has_logged_user", Template.VarConditional has_logged_user;
               "logged_user", Template.VarString logged_user;
               "is_live", Template.VarConditional true ]
-        | [`Int version; `Null; `String url; `String title;
+        | [Some version; None; Some url; Some title;
            `Timestamp last_modified_date; logged_ip; logged_user] ->
             let date = printable_date_time last_modified_date in
             let has_logged_ip, logged_ip =
               match logged_ip with
-                  `Null -> false, ""
-                | `String ip -> true, ip
+                  None -> false, ""
+                | Some ip -> true, ip
                 | _ -> assert false in
             let has_logged_user, logged_user =
               match logged_user with
-                  `Null -> false, ""
-                | `String name -> true, name
+                  None -> false, ""
+                | Some name -> true, name
                 | _ -> assert false in
-            [ "version", Template.VarString (string_of_int version);
+            [ "version", Template.VarString (Int32.to_string version);
               "url", Template.VarString url;
               "title", Template.VarString title;
               "last_modified_date", Template.VarString date;