[Web][Postfix] Add mail policies: per-recipient send/receive rules for mailboxes and groups

data/web/templates/edit/mail-policy-fields.twig

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+{# Fields of a mail policy (add modal, edit page): policy, id (prefix of the element ids), groups (choices: id, name,
+   domain, address), mailboxes (choices), ro, label_class. Groups of a list are sent apart as <list>_groups. #}
+{% set entries = {} %}
+{% set listed = {} %}
+{% for key in ['send_allow', 'send_block', 'receive_allow', 'receive_block'] %}
+  {% set plain = [] %}
+  {% set group_ids = [] %}
+  {% for entry in attribute(policy, key)|default([]) %}
+    {% if entry starts with 'group:' %}
+      {% set group_ids = group_ids|merge([entry|slice(6)]) %}
+    {% else %}
+      {% set plain = plain|merge([entry]) %}
+    {% endif %}
+  {% endfor %}
+  {% set entries = entries|merge({(key): plain|join("\n")}) %}
+  {% set listed = listed|merge({(key): group_ids}) %}
+{% endfor %}
+{% for side in ['send', 'receive'] %}
+<legend class="fs-5 mt-4"><i class="bi {{ side == 'send' ? 'bi-send' : 'bi-inbox' }}"></i> {{ attribute(lang.mail_policy, side) }}</legend><hr>
+<p class="text-muted small">{{ attribute(lang.mail_policy, side ~ '_info') }}</p>
+<div class="row mb-2">
+  <label class="control-label col-sm-2{{ label_class }}" for="{{ id }}_{{ side }}_mode">{{ lang.mail_policy.mode }}</label>
+  <div class="col-sm-10">
+    <select class="form-control" name="{{ side }}_mode" id="{{ id }}_{{ side }}_mode"{% if ro %} disabled{% endif %}>
+      {% for mode in ['all', 'internal', 'list'] %}
+      <option value="{{ mode }}"{% if attribute(policy, side ~ '_mode')|default('all') == mode %} selected{% endif %}>{{ attribute(lang.mail_policy, 'mode_' ~ side ~ '_' ~ mode) }}</option>
+      {% endfor %}
+    </select>
+    <small class="text-muted d-block">{{ lang.mail_policy.internal_info }}</small>
+  </div>
+</div>
+{% for list in ['allow', 'block'] %}
+{% set key = side ~ '_' ~ list %}
+<div class="row mb-2">
+  <label class="control-label col-sm-2{{ label_class }}" for="{{ id }}_{{ key }}">{{ attribute(lang.mail_policy, list ~ '_' ~ side) }}</label>
+  <div class="col-sm-10">
+    <textarea class="form-control" rows="3" name="{{ key }}" id="{{ id }}_{{ key }}" placeholder="partner.example, user@example.org"{% if ro %} disabled{% endif %}>{{ attribute(entries, key) }}</textarea>
+    <small class="text-muted d-block mb-1">{{ lang.mail_policy.entries_info }}</small>
+    {% if not ro %}<input type="hidden" name="{{ key }}_groups" value="">{% endif %}
+    <select data-live-search="true" data-width="100%" name="{{ key }}_groups" class="form-control mail-policy-groups" multiple title="{{ lang.mail_policy.groups }}"{% if ro %} disabled{% endif %}>
+      {% for group in groups %}
+      <option value="{{ group.id }}" data-domain="{{ group.domain }}"{% if group.id ~ '' in attribute(listed, key) %} selected{% endif %}>{{ group.name }}{% if group.address %} ({{ group.address }}){% endif %}</option>
+      {% endfor %}
+    </select>
+  </div>
+</div>
+{% endfor %}
+{% endfor %}
+<div class="row mb-2">
+  <label class="control-label col-sm-2{{ label_class }}" for="{{ id }}_reject_text">{{ lang.mail_policy.reject_text }}</label>
+  <div class="col-sm-10">
+    <input type="text" class="form-control" name="reject_text" id="{{ id }}_reject_text" maxlength="200" value="{{ policy.reject_text|default('') }}"{% if ro %} disabled{% endif %}>
+    <small class="text-muted d-block">{{ lang.mail_policy.reject_text_info }}</small>
+  </div>
+</div>
+<legend class="fs-5 mt-4"><i class="bi bi-people"></i> {{ lang.mail_policy.assign }}</legend><hr>
+<p class="text-muted small">{{ lang.mail_policy.assign_info }}</p>
+<div class="row mb-2">
+  <label class="control-label col-sm-2{{ label_class }}" for="{{ id }}_mailboxes">{{ lang.mail_policy.mailboxes }}</label>
+  <div class="col-sm-10">
+    {% if not ro %}<input type="hidden" name="mailboxes" value="">{% endif %}
+    <select data-live-search="true" data-width="100%" name="mailboxes" id="{{ id }}_mailboxes" class="form-control mail-policy-mailboxes" multiple title="{{ lang.mail_policy.mailboxes }}"{% if ro %} disabled{% endif %}>
+      {% for mailbox in mailboxes %}
+      <option value="{{ mailbox }}" data-domain="{{ mailbox|split('@')|last }}"{% if mailbox in policy.mailboxes|default([]) %} selected{% endif %}>{{ mailbox }}</option>
+      {% endfor %}
+    </select>
+  </div>
+</div>
+<div class="row mb-2">
+  <label class="control-label col-sm-2{{ label_class }}" for="{{ id }}_groups">{{ lang.mail_policy.groups }}</label>
+  <div class="col-sm-10">
+    {% if not ro %}<input type="hidden" name="groups" value="">{% endif %}
+    <select data-live-search="true" data-width="100%" name="groups" id="{{ id }}_groups" class="form-control mail-policy-groups" multiple title="{{ lang.mail_policy.groups }}"{% if ro %} disabled{% endif %}>
+      {% for group in groups %}
+      <option value="{{ group.id }}" data-domain="{{ group.domain }}"{% if group.id in policy.groups|default([]) %} selected{% endif %}>{{ group.name }}{% if group.address %} ({{ group.address }}){% endif %}</option>
+      {% endfor %}
+    </select>
+  </div>
+</div>

data/web/templates/edit/mail-policy.twig

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+{% extends 'edit.twig' %}
+
+{% block inner_content %}
+{% if result %}
+{% set ro = not result.can_edit %}
+<h4>{{ lang.mail_policy.policy }}: {{ result.name }}</h4>
+<form data-id="edit_mail_policy" class="form-horizontal" role="form" method="post" autocapitalize="none" autocorrect="off">
+  <input type="hidden" value="0" name="active">
+  <div class="row mb-2">
+    <label class="control-label col-sm-2" for="mail_policy_domain">{{ lang.mail_policy.domain }}</label>
+    <div class="col-sm-10">
+      <input type="text" class="form-control" id="mail_policy_domain" value="{{ result.domain }}" disabled>
+    </div>
+  </div>
+  <div class="row mb-2">
+    <label class="control-label col-sm-2" for="mail_policy_name">{{ lang.mail_policy.name }}</label>
+    <div class="col-sm-10">
+      <input type="text" class="form-control" name="name" id="mail_policy_name" value="{{ result.name }}" maxlength="100" required{% if ro %} disabled{% endif %}>
+    </div>
+  </div>
+  <div class="row mb-2">
+    <label class="control-label col-sm-2" for="mail_policy_description">{{ lang.mail_policy.description }}</label>
+    <div class="col-sm-10">
+      <input type="text" class="form-control" name="description" id="mail_policy_description" value="{{ result.description }}" maxlength="255"{% if ro %} disabled{% endif %}>
+    </div>
+  </div>
+  {% include 'edit/mail-policy-fields.twig' with {'policy': result, 'id': 'mail_policy', 'groups': mail_policy_groups, 'mailboxes': mailboxes, 'ro': ro, 'label_class': ''} %}
+  <div class="row mb-4">
+    <div class="offset-sm-2 col-sm-10">
+      <div class="form-check">
+        <label><input type="checkbox" class="form-check-input" value="1" name="active"{% if result.active == 1 %} checked{% endif %}{% if ro %} disabled{% endif %}> {{ lang.mailbox.active }}</label>
+      </div>
+    </div>
+  </div>
+  {% if not ro %}
+  <div class="row">
+    <div class="offset-sm-2 col-sm-10">
+      <button class="btn btn-xs-lg d-block d-sm-inline btn-success" data-action="edit_selected" data-id="edit_mail_policy" data-item="{{ result.id }}" data-api-url='edit/mail-policy' data-api-attr='{}' href="#"><i class="bi bi-check-lg"></i> {{ lang.admin.save }}</button>
+    </div>
+  </div>
+  {% endif %}
+</form>
+{% else %}
+  {{ parent() }}
+{% endif %}
+{% endblock %}