portal: additional buttons on list pages

link to onion services page from origin page
link to previews of distribution lists from lists

app/portal/list.py

@@ -1,18 +1,32 @@
+import json
 from datetime import datetime
 
-from flask import render_template, url_for, flash, redirect, Blueprint
+from flask import render_template, url_for, flash, redirect, Blueprint, Response
 from flask_wtf import FlaskForm
 from sqlalchemy import exc
 from wtforms import SelectField, StringField, SubmitField
 from wtforms.validators import DataRequired
 
-from app import db
+from app.extensions import db
+from app.lists.bc2 import mirror_sites
+from app.lists.bridgelines import bridgelines
+from app.lists.mirror_mapping import mirror_mapping
 from app.models.base import MirrorList
 from app.portal.util import response_404, view_lifecycle
 
 bp = Blueprint("list", __name__)
 
 
+@bp.app_template_filter("provider_name")
+def list_provider_name(s: str) -> str:
+    return MirrorList.providers_supported.get(s, "Unknown")
+
+
+@bp.app_template_filter("format_name")
+def list_format_name(s: str) -> str:
+    return MirrorList.formats_supported.get(s, "Unknown")
+
+
 @bp.route('/list')
 def list_list():
     lists = MirrorList.query.filter(MirrorList.destroyed == None).all()
@@ -21,7 +35,27 @@ def list_list():
                            title="Mirror Lists",
                            item="mirror list",
                            new_link=url_for("portal.list.list_new"),
-                           items=lists)
+                           items=lists,
+                           extra_buttons=[
+                               {
+                                   "link": url_for("portal.list.list_preview", format_=k),
+                                   "text": f"Preview {v}",
+                                   "style": "secondary"
+                               }
+                               for k, v in MirrorList.formats_supported.items()
+                           ]
+                           )
+
+
+@bp.route('/preview/<format_>')
+def list_preview(format_: str):
+    if format_ == "bca":
+        return Response(json.dumps(mirror_mapping()), content_type="application/json")
+    if format_ == "bc2":
+        return Response(json.dumps(mirror_sites()), content_type="application/json")
+    if format_ == "bridgelines":
+        return Response(json.dumps(bridgelines()), content_type="application/json")
+    return response_404(message="Format not found")
 
 
 @bp.route("/destroy/<list_id>", methods=['GET', 'POST'])
@@ -44,17 +78,8 @@ def list_destroy(list_id: int):
 @bp.route("/new/<group_id>", methods=['GET', 'POST'])
 def list_new(group_id=None):
     form = NewMirrorListForm()
-    form.provider.choices = [
-        ("github", "GitHub"),
-        ("gitlab", "GitLab"),
-        ("s3", "AWS S3"),
-    ]
-    form.format.choices = [
-        ("bc2", "Bypass Censorship v2"),
-        ("bc3", "Bypass Censorship v3"),
-        ("bca", "Bypass Censorship Analytics"),
-        ("bridgelines", "Tor Bridge Lines")
-    ]
+    form.provider.choices = [(k, v) for k, v in MirrorList.providers_supported]
+    form.format.choices = [(k, v) for k, v in MirrorList.formats_supported]
     if form.validate_on_submit():
         list_ = MirrorList()
         list_.provider = form.provider.data