[proofing] Add partial work for search+replace

## Tests

1. built container with make docker-start
2. checked Texts, Dictionaries, and Proofing pages.
3. tested `proofing > project > edit > search` page
4. tested `proofing > project > edit > search and replace` page

## To do

1. Test actual `search and replace`. I could not find a pre-existing
text in db to test this feature.
2. add support in translation files

ambuda/templates/proofing/projects/edit.html

@@ -15,12 +15,14 @@
 {{ m.project_nav(project=project, active='edit') }}
 
 {% set search_url = url_for("proofing.project.search", slug=project.slug)  %}
+{% set replace_url = url_for("proofing.project.replace", slug=project.slug)  %}
 {% set ocr_url = url_for("proofing.project.batch_ocr", slug=project.slug)  %}
 
 <div class="prose">
 
 <ul>
   <li><a href="{{ search_url }}">{{ _('Search the project') }}</a></li>
+  <li><a href="{{ replace_url }}">{{ _('Search & replace in the project') }}</a></li>
   <li><a href="{{ ocr_url }}">{{ _('Run batch OCR') }}</a></p>
 </ul>
 

ambuda/templates/proofing/projects/replace.html

@@ -0,0 +1,47 @@
+{% extends 'proofing/base.html' %}
+{% from "macros/forms.html" import field %}
+{% import "macros/proofing.html" as m %}
+
+{% block title %}Search and Replace {{ project.title }} | Ambuda{% endblock %}
+
+{% block content %}
+
+{{ m.project_header_nested('Search and Replace', project) }}
+{{ m.project_nav(project=project, active='edit') }}
+
+<div class="prose">
+  <p>Use this simple search and replace form to make edits across this project.</p>
+</div>
+
+<form method="GET" class="bg-slate-100 p-4 my-4">
+  {{ field(form.query) }}
+  {{ field(form.replace) }}
+  <input class="btn btn-submit" type="submit" value="Project-wide Search & Replace">
+</form>
+
+{% if query %}
+<div class="prose">
+
+{% macro sp(s, p, n) %}{% if n == 1 %}{{ s }}{% else %}{{ p }}{% endif %}{% endmacro %}
+
+{% set nr = results|length %}
+<p>Found {{ nr }} {{ sp("page", "pages", nr) }} that {{ sp("contains", "contain", nr) }} <kbd>{{ query }}</kbd>.</p>
+
+<ul>
+{% for page in results %}
+{% set page_url = url_for("proofing.page.edit", project_slug=project.slug, page_slug=page.slug) %}
+<li>
+    <a href="{{ page_url }}">{{ project.title }}/{{ page.slug }}</a>
+    <div class="p-2 border-l my-2">
+    {% for match in page.matches %}
+    <pre class="p-0.5">{{ match.query }}</pre>
+    <pre class="p-0.5">{{ match.update }}</pre>
+    {%- endfor %}
+    </div>
+</li>
+{% endfor %}
+</ul>
+
+</div>
+{% endif %}
+{% endblock %}

ambuda/views/proofing/project.py

@@ -96,6 +96,13 @@ class DeleteProjectForm(FlaskForm):
     slug = StringField("Slug", validators=[DataRequired()])
 
 
+class ReplaceForm(SearchForm):
+    class Meta:
+        csrf = False
+
+    replace = StringField(_l("Replace"), validators=[DataRequired()])
+
+
 @bp.route("/<slug>/")
 def summary(slug):
     """Show basic information about the project."""
@@ -279,6 +286,64 @@ def search(slug):
     )
 
 
+@bp.route("/<slug>/replace")
+@login_required
+def replace(slug):
+    """Search and replace a string across all of the project's pages.
+
+    This is useful to replace a string across the project in one shot.
+    """
+    project_ = q.project(slug)
+    if project_ is None:
+        abort(404)
+
+    form = ReplaceForm(request.args)
+    if not form.validate():
+        return render_template(
+            "proofing/projects/replace.html", project=project_, form=form
+        )
+
+    # search for "query" string and replace with "update" string
+    query = form.query.data
+    update = form.replace.data
+
+    results = []
+    for page_ in project_.pages:
+        if not page_.revisions:
+            continue
+
+        matches = []
+
+        latest = page_.revisions[-1]
+        for line in latest.content.splitlines():
+            if query in line:
+                matches.append(
+                    {
+                        "query": escape(line).replace(
+                            query, Markup(f"<mark>{escape(query)}</mark>")
+                        ),
+                        "update": escape(line).replace(
+                            query, Markup(f"<mark>{escape(update)}</mark>")
+                        ),
+                    }
+                )
+        if matches:
+            results.append(
+                {
+                    "slug": page_.slug,
+                    "matches": matches,
+                }
+            )
+    return render_template(
+        "proofing/projects/replace.html",
+        project=project_,
+        form=form,
+        query=query,
+        update=update,
+        results=results,
+    )
+
+
 @bp.route("/<slug>/batch-ocr", methods=["GET", "POST"])
 @p2_required
 def batch_ocr(slug):