update for mail-storage version 1.1.0

Now a keyset based pagination is used instead of an offset based one.

This removes the dependency flask-paginate.

URL arguments are taken from the request object in the displayheaders
templates instead of passing them in manually.

Not needed arguments for about render_template are removed.

9 files changed, 212 insertions, 80 deletions

diff --git a/pyproject.toml b/pyproject.toml
index a3f3d37..c611154 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,7 +9,6 @@ dependencies = [
   "Flask-Babel",
   "Flask-Login",
   "Flask-WTF",
-  "flask-paginate",
   "email-validator",
   "varlink",
 ]
diff --git a/src/jwebmail/__init__.py b/src/jwebmail/__init__.py
index 0a52677..8b98e7a 100644
--- a/src/jwebmail/__init__.py
+++ b/src/jwebmail/__init__.py
@@ -36,7 +36,7 @@ else:
 
     toml_read_file = dict(load=toml_load, text=True)
 
-__version__ = "2.7.0.dev1"
+__version__ = "2.8.0.dev0"
 
 csrf = CSRFProtect()
 
diff --git a/src/jwebmail/model/de.jmhoffmann.jwebmail.mail-storage.varlink b/src/jwebmail/model/de.jmhoffmann.jwebmail.mail-storage.varlink
index 3be999b..850ff19 100644
--- a/src/jwebmail/model/de.jmhoffmann.jwebmail.mail-storage.varlink
+++ b/src/jwebmail/model/de.jmhoffmann.jwebmail.mail-storage.varlink
@@ -58,23 +58,54 @@ type MIMEPart (
   body:        MailBody
 )
 
+# sorting by subject is deprecated
 type Sort (
   direction: (asc, desc),
-  parameter: (date, size, sender)
+  parameter: (date, size, sender, subject)
+)
+
+type Bound (
+  param: string,
+  id: string
 )
 
 
 method Init(unix_user: string, mailbox_path: string) -> ()
+
+# deprecated: use ListSearch instead
 method List(folder: string, start: int, end: int, sort: Sort) -> (mail_heads: []ListMailHeader)
+
 method Stats(folder: string) -> (mail_count: int, unread_count: int, byte_size: int)
+
 method Show(folder: string, mid: string) -> (mail: Mail)
-method Raw(folder: string, mid: string, path: ?string) -> (header: MIMEHeader, body: string)  # body is base64 encoded
+
+# body is base64 encoded
+method Raw(folder: string, mid: string, path: ?string) -> (header: MIMEHeader, body: string)
+
+# deprecated: use ListSearch instead
 method Search(folder: string, pattern: string) -> (found: []ListMailHeader)
+
 method Folders() -> (folders: []string)
+
 method Move(mid: string, from_folder: string, to_folder: string) -> ()
+
 method Remove(folder: string, mid: string) -> ()
+
 method AddFolder(name: string) -> (status: (created, skiped))
 
+method ListSearch(
+  folder: string,
+  bound: ?Bound,
+  direction: (after, before),
+  limit: int,
+  sort: Sort,
+  search: ?string
+) -> (
+  mail_heads: []ListMailHeader,
+  first: bool,
+  last: bool
+)
+
 
 error NotInitialized()
 error InvalidFolder(folder: string)
diff --git a/src/jwebmail/model/read_mails.py b/src/jwebmail/model/read_mails.py
index 8a19224..b2e1191 100644
--- a/src/jwebmail/model/read_mails.py
+++ b/src/jwebmail/model/read_mails.py
@@ -27,7 +27,7 @@ class QMailAuthuser:
         self._client = None
         self._connection = None
 
-    def read_headers_for(self, folder, start, end, sort):
+    def list_search(self, folder, bound, after, limit, sort, search):
         sort_val = dict()
         if sort[0] == "!":
             sort = sort[1:]
@@ -41,17 +41,32 @@ class QMailAuthuser:
             case _:
                 raise ValueError(f"invalid sort parameter {sort!r}")
 
-        req = self._connection.List(folder=folder, start=start, end=end, sort=sort_val)
-        return [
-            {
-                "message_handle": lmh["mid"],
-                "byte_size": lmh["byte_size"],
-                "unread": lmh["unread"],
-                "date_received": lmh["rec_date"],
-                "head": self._mail_header(lmh["header"]),
-            }
-            for lmh in req["mail_heads"]
-        ]
+        if bound is not None:
+            param, mid = bound.split("_", 1)
+            bound = {"param": param, "id": mid}
+
+        req = self._connection.ListSearch(
+            folder=folder,
+            bound=bound,
+            direction="after" if after else "before",
+            limit=limit,
+            sort=sort_val,
+            search=search,
+        )
+        return (
+            [
+                {
+                    "message_handle": lmh["mid"],
+                    "byte_size": lmh["byte_size"],
+                    "unread": lmh["unread"],
+                    "date_received": lmh["rec_date"],
+                    "head": self._mail_header(lmh["header"]),
+                }
+                for lmh in req["mail_heads"]
+            ],
+            req["first"],
+            req["last"],
+        )
 
     def count(self, folder):
         resp = self._connection.Stats(folder=folder)
@@ -75,10 +90,6 @@ class QMailAuthuser:
             "body": b64decode(resp["body"]),
         }
 
-    def search(self, pattern, folder):
-        resp = self._connection.Search(folder=folder, pattern=pattern)
-        return resp
-
     def folders(self):
         resp = self._connection.Folders()
         return list(resp["folders"]) + [""]
diff --git a/src/jwebmail/templates/_bot_nav.html b/src/jwebmail/templates/_bot_nav.html
index 2634151..bd9e05a 100644
--- a/src/jwebmail/templates/_bot_nav.html
+++ b/src/jwebmail/templates/_bot_nav.html
@@ -1,7 +1,43 @@
 <div class="columns">
 
-  <div class="column">
-    {{ pgn.links }}
+  <div class=column>
+    <nav class="pagination" role="navigation">
+      {% if first %}
+        <a class="pagination-previous" disabled>&laquo;</a>
+      {% else %}
+        <a class="pagination-previous"
+           href="{{ url_for(
+                      'displayheaders',
+                      folder=request.view_args.folder,
+                      page_bound=page_bound_before,
+                      page_after=0,
+                      per_page=request.args.get('per_page'),
+                      sort=request.args.get('sort'),
+                      search=request.args.get('search'),
+                    ) }}"
+           aria-label="Next">
+          &laquo;
+        </a>
+      {% endif %}
+
+      {% if last %}
+        <a class="pagination-next" disabled>&raquo;</a>
+      {% else %}
+        <a class="pagination-next"
+           href="{{ url_for(
+                      'displayheaders',
+                      folder=request.view_args.folder,
+                      page_bound=page_bound_after,
+                      page_after=1,
+                      per_page=request.args.get('per_page'),
+                      sort=request.args.get('sort'),
+                      search=request.args.get('search'),
+                    ) }}"
+           aria-label="Next">
+          &raquo;
+        </a>
+      {% endif %}
+    </nav>
   </div>
 
   <div class="column">
@@ -9,9 +45,11 @@
     {% if mail_folders|length > 1 %}
       <form action="{{ url_for('move', folder=folder) }}" id="move-mail" class=is-pulled-left method=POST>
         <input type=hidden name=csrf_token value="{{ csrf_token() }}">
-        <input type=hidden name=sort value="{{ request.args['sort'] }}">
-        <input type=hidden name=per_page value="{{ request.args['per_page'] }}">
-        <input type=hidden name=page value="{{ request.args['page'] }}">
+        <input type=hidden name=sort value="{{ request.args.sort }}">
+        <input type=hidden name=search value="{{ request.args.search }}">
+        <input type=hidden name=per_page value="{{ request.args.per_page }}">
+        <input type=hidden name=page_bound value="{{ request.args.page_bound }}">
+        <input type=hidden name=after_page value="{{ request.args.after_page }}">
         <div class="field has-addons">
           <div class=control>
             <div class=select>
@@ -35,9 +73,11 @@
       method=POST class="is-pulled-left ml-2">
 
       <input type=hidden name=csrf_token value="{{ csrf_token() }}">
-      <input type=hidden name=sort value="{{ request.args['sort'] }}">
-      <input type=hidden name=per_page value="{{ request.args['per_page'] }}">
-      <input type=hidden name=page value="{{ request.args['page'] }}">
+      <input type=hidden name=sort value="{{ request.args.sort }}">
+      <input type=hidden name=search value="{{ request.args.search }}">
+      <input type=hidden name=per_page value="{{ request.args.per_page }}">
+      <input type=hidden name=page_bound value="{{ request.args.page_bound }}">
+      <input type=hidden name=after_page value="{{ request.args.after_page }}">
       <div class=control>
         <input id=remove type=submit class=button value="{{ gettext('Remove') }}">
       </div>
diff --git a/src/jwebmail/templates/_folders.html b/src/jwebmail/templates/_folders.html
index fc4c21d..884188b 100644
--- a/src/jwebmail/templates/_folders.html
+++ b/src/jwebmail/templates/_folders.html
@@ -5,7 +5,7 @@
 
       <div class="navbar-brand">
         <span class=navbar-item>
-          <b>{{ folder or gettext('Home') }}</b>
+          <b>{{ request.view_args.folder or gettext('Home') }}</b>
         </span>
         <a role="button" class="navbar-burger" data-target="navMenu" id=navbar-toggle>
           <span aria-hidden="true"></span>
@@ -16,7 +16,7 @@
 
       <div class="navbar-menu" id="navMenu">
         <div class=navbar-start>
-          {% for f in mail_folders if f is ne folder %}
+          {% for f in mail_folders if f is ne request.view_args.get('folder', '') %}
             <a href="{{ url_for('displayheaders', folder=f, per_page=request.args.get('per_page')) }}" class="navbar-item">
               {{ f or gettext('Home') }}
             </a>
@@ -34,7 +34,7 @@
   <div class="column is-size-7">
     <div class="columns is-multiline is-mobile">
       <span class="column is-half-mobile has-text-centered">
-        {{ pgn.info }}
+        {{ total_mails }} Mails
       </span>
       {% if total_new_mails %}
         <span class="column is-half-mobile has-text-centered">
diff --git a/src/jwebmail/templates/_main_table.html b/src/jwebmail/templates/_main_table.html
index cc22da4..a7801eb 100644
--- a/src/jwebmail/templates/_main_table.html
+++ b/src/jwebmail/templates/_main_table.html
@@ -3,10 +3,6 @@
   {% for msg in msgs %}
 
     <tag class="media {{ 'jwm-new-mail' if msg.unread else '' }}" id="{{ msg.message_handle }}">
-      <div class="media-left is-hidden-mobile">
-        {{ loop.index + (pgn.page - 1) * pgn.per_page }}
-      </div>
-
       <div class="media-content">
         <div class="columns is-gapless is-multiline">
           <div class="column is-10">
@@ -27,7 +23,7 @@
           </div>
 
           <div class="column is-10">
-            <a href="{{ url_for('read', msgid=msg.message_handle, folder=folder) }}">
+            <a href="{{ url_for('read', msgid=msg.message_handle, folder=request.view_args.folder) }}">
               {{ msg.head.subject or '_' }}
             </a>
           </div>
diff --git a/src/jwebmail/templates/_top_nav.html b/src/jwebmail/templates/_top_nav.html
index 960ae86..a9d385b 100644
--- a/src/jwebmail/templates/_top_nav.html
+++ b/src/jwebmail/templates/_top_nav.html
@@ -28,7 +28,43 @@
   </form>
 
   <div class=column>
-    {{ pgn.links }}
+    <nav class="pagination" role="navigation">
+      {% if first %}
+        <a class="pagination-previous" disabled>&laquo;</a>
+      {% else %}
+        <a class="pagination-previous"
+           href="{{ url_for(
+                      'displayheaders',
+                      folder=request.view_args.folder,
+                      page_bound=page_bound_before,
+                      page_after=0,
+                      per_page=request.args.get('per_page'),
+                      sort=request.args.get('sort'),
+                      search=request.args.get('search'),
+                    ) }}"
+           aria-label="Next">
+          &laquo;
+        </a>
+      {% endif %}
+
+      {% if last %}
+        <a class="pagination-next" disabled>&raquo;</a>
+      {% else %}
+        <a class="pagination-next"
+           href="{{ url_for(
+                      'displayheaders',
+                      folder=request.view_args.folder,
+                      page_bound=page_bound_after,
+                      page_after=1,
+                      per_page=request.args.get('per_page'),
+                      sort=request.args.get('sort'),
+                      search=request.args.get('search'),
+                    ) }}"
+           aria-label="Next">
+          &raquo;
+        </a>
+      {% endif %}
+    </nav>
   </div>
 
 </div>
diff --git a/src/jwebmail/webmail.py b/src/jwebmail/webmail.py
index 99cc542..1b14af0 100644
--- a/src/jwebmail/webmail.py
+++ b/src/jwebmail/webmail.py
@@ -14,7 +14,6 @@ from urllib.parse import urlparse
 from flask import abort, current_app, flash, redirect, render_template, request, url_for
 from flask_babel import gettext, lazy_gettext
 from flask_login import current_user, logout_user
-from flask_paginate import Pagination, get_page_parameter, get_per_page_parameter
 from flask_wtf import FlaskForm
 from werkzeug.utils import secure_filename
 from wtforms import (
@@ -80,14 +79,10 @@ def logout():
 
 
 def about():
-    view_model = {
-        "scriptadmin": current_app.config["JWEBMAIL"]["ADMIN_MAIL"],
-        "http_host": request.host,
-        "request_uri": request.full_path,
-        "remote_addr": request.remote_addr,
-        "languages": current_app.extensions["babel"].instance.list_translations(),
-    }
-    return render_template("about.html", **view_model)
+    return render_template(
+        "about.html",
+        languages=current_app.extensions["babel"].instance.list_translations(),
+    )
 
 
 def displayheaders(folder=""):
@@ -96,6 +91,9 @@ def displayheaders(folder=""):
     if folder and folder not in folders:
         return render_template("error", error="no_folder", links=folders), 404
 
+    page_bound = request.args.get("page_bound")
+    page_after = bool(request.args.get("page_after", type=int, default=True))
+    per_page = request.args.get("per_page", type=int, default=25)
     sort = request.args.get("sort", "!date")
     search = request.args.get("search")
 
@@ -105,41 +103,58 @@ def displayheaders(folder=""):
 
     count = get_read_mails_logged_in().count(folder)
 
-    page = request.args.get(get_page_parameter(), type=int, default=1)
-    per_page = request.args.get(get_per_page_parameter(), type=int, default=25)
-
-    pgn = Pagination(
-        page=page,
-        per_page=per_page,
-        total=count["total_mails"],
-        record_name="mails",
-        css_framework="bulma",
-        display_msg=gettext(
-            "displaying <b>{start} - {end}</b> of <b>{total}</b> {record_name}"
-        ),
-        inner_window=1,
-        outer_window=0,
+    headers, first, last = get_read_mails_logged_in().list_search(
+        folder=folder,
+        bound=page_bound,
+        after=page_after,
+        limit=per_page,
+        sort=sort,
+        search=search,
     )
 
-    if search:
-        headers = get_read_mails_logged_in().search(search, folder)
+    if headers:
+        match s:
+            case "date":
+                page_bound_after = (
+                    headers[-1]["date_received"] + "_" + headers[-1]["message_handle"]
+                )
+                page_bound_before = (
+                    headers[0]["date_received"] + "_" + headers[0]["message_handle"]
+                )
+            case "size":
+                page_bound_after = (
+                    str(headers[-1]["byte_size"]) + "_" + headers[-1]["message_handle"]
+                )
+                page_bound_before = (
+                    str(headers[0]["byte_size"]) + "_" + headers[0]["message_handle"]
+                )
+            case "sender":
+                page_bound_after = (
+                    headers[-1]["head"]["from"][0]["address"]
+                    + "_"
+                    + headers[-1]["message_handle"]
+                )
+                page_bound_before = (
+                    headers[0]["head"]["from"][0]["address"]
+                    + "_"
+                    + headers[0]["message_handle"]
+                )
     else:
-        headers = get_read_mails_logged_in().read_headers_for(
-            folder=folder,
-            start=(pgn.page - 1) * pgn.per_page,
-            end=(pgn.page - 1) * pgn.per_page + pgn.per_page,
-            sort=sort,
-        )
-
-    vals = {
-        "folder": folder,
-        "pgn": pgn,
-        "msgs": headers,
-        "mail_folders": folders,
-        "total_size": count["byte_size"],
-        "total_new_mails": count["unread_mails"],
-    }
-    return render_template("displayheaders.html", **vals)
+        page_bound_after = None
+        page_bound_before = None
+
+    return render_template(
+        "displayheaders.html",
+        first=first,
+        last=last,
+        page_bound_after=page_bound_after,
+        page_bound_before=page_bound_before,
+        msgs=headers,
+        mail_folders=folders,
+        total_mails=count["total_mails"],
+        total_size=count["byte_size"],
+        total_new_mails=count["unread_mails"],
+    )
 
 
 def readmail(msgid, folder=""):
@@ -190,10 +205,14 @@ def _take_common_req_args(mapping):
     res = dict()
     if mapping.get("sort"):
         res["sort"] = mapping["sort"]
+    if mapping.get("search"):
+        res["search"] = mapping["search"]
     if mapping.get("per_page"):
         res["per_page"] = mapping["per_page"]
-    if mapping.get("page"):
-        res["page"] = mapping["page"]
+    if mapping.get("page_bound"):
+        res["page_bound"] = mapping["page_bound"]
+    if mapping.get("after_page"):
+        res["after_page"] = mapping["after_page"]
     return res