From e7ad9a390584ac9df0f7c03dc687e38ca4e073e3 Mon Sep 17 00:00:00 2001
From: Bryan Newbold <bnewbold@robocracy.org>
Date: Wed, 17 Nov 2021 20:23:30 -0800
Subject: initial implementation of editgroup 'diff' for review

---
 python/fatcat_web/entity_helpers.py             | 71 ++++++++++++++++++++++-
 python/fatcat_web/routes.py                     | 30 ++++++++++
 python/fatcat_web/templates/editgroup_diff.html | 77 +++++++++++++++++++++++++
 python/fatcat_web/templates/editgroup_view.html | 11 ++--
 4 files changed, 183 insertions(+), 6 deletions(-)
 create mode 100644 python/fatcat_web/templates/editgroup_diff.html

diff --git a/python/fatcat_web/entity_helpers.py b/python/fatcat_web/entity_helpers.py
index 86543ee3..bf81dfce 100644
--- a/python/fatcat_web/entity_helpers.py
+++ b/python/fatcat_web/entity_helpers.py
@@ -1,4 +1,5 @@
-from typing import Any, Tuple
+import difflib
+from typing import Any, Dict, Tuple
 
 from fatcat_openapi_client import (
     ContainerEntity,
@@ -17,6 +18,7 @@ from flask import abort
 
 from fatcat_tools.transforms import (
     container_to_elasticsearch,
+    entity_to_toml,
     file_to_elasticsearch,
     release_to_elasticsearch,
 )
@@ -188,7 +190,7 @@ def generic_get_entity_revision(entity_type: str, revision_id: str) -> Any:
         elif entity_type == "work":
             return enrich_work_entity(api.get_work_revision(revision_id))
         else:
-            raise NotImplementedError
+            raise NotImplementedError(f"entity_type: {entity_type}")
     except ApiException as ae:
         abort(ae.status)
     except ApiValueError:
@@ -258,3 +260,68 @@ def generic_get_editgroup_entity(
 
     entity.ident = ident
     return entity, edit
+
+
+def _entity_edit_diff(entity_type: str, entity_edit: EntityEdit) -> Dict[str, Any]:
+    """
+    entity_edit
+        ident
+        revision
+        prev_revision
+        redirect_ident
+    """
+    pop_fields = ["revision", "state"]
+    new_rev = generic_get_entity_revision(entity_type, entity_edit.revision)
+    new_toml = entity_to_toml(new_rev, pop_fields=pop_fields)
+    if entity_edit.prev_revision:
+        old_rev = generic_get_entity_revision(entity_type, entity_edit.prev_revision)
+        old_toml = entity_to_toml(old_rev, pop_fields=pop_fields)
+        fromdesc = f"/{entity_type}/rev/{entity_edit.prev_revision}.toml"
+    else:
+        old_toml = ""
+        fromdesc = "(created)"
+
+    # differ = difflib.HtmlDiff(tabsize=4)
+    # html_table = differ.make_table(
+    #    old_toml.split('\n'),
+    #    new_toml.split('\n'),
+    #    fromdesc=fromdesc,
+    #    todesc=entity_edit.revision,
+    #    context=True,
+    #    numlines=3,
+    # )
+    # return dict(html_table=html_table)
+    diff_lines = list(
+        difflib.unified_diff(
+            old_toml.split("\n"),
+            new_toml.split("\n"),
+            fromfile=fromdesc,
+            tofile=f"/{entity_type}/rev/{entity_edit.revision}.toml",
+        )
+    )
+    return dict(diff_lines=diff_lines)
+
+
+def editgroup_get_diffs(editgroup: Editgroup) -> Dict[str, Any]:
+    diffs: Dict[str, Any] = {}
+
+    for entity_type in [
+        "container",
+        "creator",
+        "release",
+        "work",
+        "file",
+        "fileset",
+        "webcapture",
+    ]:
+        edits = getattr(editgroup.edits, entity_type + "s") or []
+        diffs[entity_type] = {}
+        for ed in edits:
+            # only for creation and update
+            if ed.revision and not ed.redirect_ident:
+                diffs[entity_type][ed.ident] = _entity_edit_diff(entity_type, ed)
+            else:
+                diffs[entity_type][ed.ident] = None
+        # XXX:
+        print(diffs.keys())
+    return diffs
diff --git a/python/fatcat_web/routes.py b/python/fatcat_web/routes.py
index 3d2c68cd..f180e339 100644
--- a/python/fatcat_web/routes.py
+++ b/python/fatcat_web/routes.py
@@ -41,6 +41,7 @@ from fatcat_web.auth import (
 )
 from fatcat_web.cors import crossdomain
 from fatcat_web.entity_helpers import (
+    editgroup_get_diffs,
     generic_get_editgroup_entity,
     generic_get_entity,
     generic_get_entity_revision,
@@ -689,6 +690,35 @@ def editgroup_view(ident: str) -> AnyResponse:
     return render_template("editgroup_view.html", editgroup=eg, auth_to=auth_to)
 
 
+@app.route("/editgroup/<string(length=26):ident>/diff", methods=["GET"])
+def editgroup_diff_view(ident: str) -> AnyResponse:
+    try:
+        eg = api.get_editgroup(str(ident))
+        eg.editor = api.get_editor(eg.editor_id)
+        eg.annotations = api.get_editgroup_annotations(eg.editgroup_id, expand="editors")
+    except ApiException as ae:
+        abort(ae.status)
+    # TODO: idomatic check for login?
+    auth_to = dict(
+        submit=False,
+        accept=False,
+        edit=False,
+        annotate=False,
+    )
+    if session.get("editor"):
+        user = load_user(session["editor"]["editor_id"])
+        auth_to["annotate"] = True
+        if user.is_admin or user.editor_id == eg.editor_id:
+            auth_to["submit"] = True
+            auth_to["edit"] = True
+        if user.is_admin:
+            auth_to["accept"] = True
+    diffs = editgroup_get_diffs(eg)
+    return render_template(
+        "editgroup_diff.html", editgroup=eg, auth_to=auth_to, editgroup_diffs=diffs
+    )
+
+
 @app.route("/editgroup/<string(length=26):ident>/annotation", methods=["POST"])
 @login_required
 def editgroup_create_annotation(ident: str) -> AnyResponse:
diff --git a/python/fatcat_web/templates/editgroup_diff.html b/python/fatcat_web/templates/editgroup_diff.html
new file mode 100644
index 00000000..de6a800d
--- /dev/null
+++ b/python/fatcat_web/templates/editgroup_diff.html
@@ -0,0 +1,77 @@
+{% extends "editgroup_view.html" %}
+
+{% macro edit_diff_list(auth_to, editgroup, edits, diffs, entity_type, entity_name) -%}
+{% if edits %}
+  <h3>{{ entity_name }} Edits ({{ edits|count }})</h3>
+  <hr>
+  <div class="ui divided list">
+    {% for edit in edits %}
+    <div class="item">
+      <div class="content" style="padding-bottom: 0.5em;">
+        <div style="float: right; font-weight: bold;">
+          <a href="/editgroup/{{ editgroup.editgroup_id }}/{{ entity_type }}/{{ edit.ident }}">[view]</a>
+          {% if auth_to.edit and not editgroup.changelog_index and not editgroup.submitted %}
+            <br><a href="/editgroup/{{ editgroup.editgroup_id }}/{{ entity_type }}/{{ edit.ident }}/edit" style="color: green;">[re-edit]</a>
+            <br>
+            <form id="submit_edit_delete" method="POST" action="/editgroup/{{ editgroup.editgroup_id }}/{{ entity_type }}/edit/{{ edit.edit_id }}/delete" style="display:inline;">
+                <input type="hidden" name="csrf_token" value="{{ csrf_token() }}"/>
+                <input type="submit" value="[delete]" style="background:none; color: red; border: none; font-weight:bold; cursor:pointer; padding: 0;"></input>
+            </form>
+          {% endif %}
+        </div>
+        <div class="header">
+          <a href="/{{ entity_type }}/{{ edit.ident }}">{{ entity_type }}_{{ edit.ident }}</a>
+          {% if edit.redirect_ident %}
+            =&gt; redirect to <a href="/{{ entity_type }}/{{ edit.redirect_ident }}">{{ entity_type }}/{{ edit.redirect_ident }}</a>
+          {% elif not edit.revision %}
+            deleted
+          {% elif not edit.prev_revision %}
+            created
+          {% else %}
+            updated
+          {% endif %}
+        </div>
+        {% if edit.revision %}
+          Revision: <small><code><a href="/{{ entity_type }}/rev/{{ edit.revision }}">{{ edit.revision }}</a></code></small>
+        {% endif %}
+        {% if edit.extra %}
+          {{ entity_macros.extra_metadata(edit.extra) }}
+        {% endif %}
+        {% if edit.revision and not edit.redirect_ident and edit.ident in diffs %}
+          <div style="border: 2px solid black; overflow-x:scroll; margin: 0.5em;">
+          {% for line in diffs[edit.ident]['diff_lines'] %}
+            {% set line_space = false %}
+            {% if line.startswith('@@') or line.startswith('---') or line.startswith('+++') %}
+              {% set line_color = "lightblue" %}
+            {% elif line.startswith('+') %}
+              {% set line_color = "lightgreen" %}
+            {% elif line.startswith('-') %}
+              {% set line_color = "#ffa3a3" %}
+            {% else %}
+              {% set line_color = "#ddd" %}
+              {% set line_space = true %}
+            {% endif %}
+            <pre style="background-color: {{ line_color }}; margin: 0px;">{% if line_space %} {% endif %}{{ line.strip() }}</pre>
+          {% endfor %}
+          </div>
+        {% endif %}
+      </div>
+    </div>
+    {% endfor %}
+  </div>
+{% endif %}
+{%- endmacro %}
+
+{% block title %}Editgroup diff{% endblock %}
+
+{% block editgroupedits %}
+<h3 class="ui header">All Entity Change Diffs</h3>
+{{ edit_diff_list(auth_to, editgroup, editgroup.edits.releases, editgroup_diffs.release, "release", "Release") }}
+{{ edit_diff_list(auth_to, editgroup, editgroup.edits.works, editgroup_diffs.work, "work", "Work") }}
+{{ edit_diff_list(auth_to, editgroup, editgroup.edits.containers, editgroup_diffs.container, "container", "Container") }}
+{{ edit_diff_list(auth_to, editgroup, editgroup.edits.creators, editgroup_diffs.creator, "creator", "Creator") }}
+{{ edit_diff_list(auth_to, editgroup, editgroup.edits.files, editgroup_diffs.file, "file", "File") }}
+{{ edit_diff_list(auth_to, editgroup, editgroup.edits.filesets, editgroup_diffs.fileset, "fileset", "File Set") }}
+{{ edit_diff_list(auth_to, editgroup, editgroup.edits.webcaptures, editgroup_diffs.webcapture, "webcapture", "Web Capture") }}
+{% endblock %}
+
diff --git a/python/fatcat_web/templates/editgroup_view.html b/python/fatcat_web/templates/editgroup_view.html
index e1af719d..de904c2a 100644
--- a/python/fatcat_web/templates/editgroup_view.html
+++ b/python/fatcat_web/templates/editgroup_view.html
@@ -1,10 +1,6 @@
 {% extends "base.html" %}
 {% import "entity_macros.html" as entity_macros %}
 
-{% block title %}Editgroup{% endblock %}
-
-{% block body %}
-
 {% macro edit_list(auth_to, editgroup, edits, entity_type, entity_name) -%}
 <div class="{% if edits %}active{% endif %} title">
   <h3><i class="dropdown icon"></i>{{ entity_name }} Edits ({{ edits|count }})</h3>
@@ -49,6 +45,9 @@
 </div>
 {%- endmacro %}
 
+{% block title %}Editgroup{% endblock %}
+
+{% block body %}
 {# extended by changelog_entry #}
 {% block editgroupheader %}
 
@@ -170,6 +169,7 @@
   {{ entity_macros.extra_metadata(editgroup.extra) }}
 {% endif %}
 
+{% block editgroupedits %}
 <h3 class="ui header">All Entity Changes</h3>
 <div class="ui styled fluid accordion">
   {{ edit_list(auth_to, editgroup, editgroup.edits.releases, "release", "Release") }}
@@ -183,8 +183,10 @@
 <div style="float: right; font-size: smaller;">
   <a href="{{ config.FATCAT_PUBLIC_API_HOST }}/editgroup/{{ editgroup.editgroup_id }}">As JSON via API</a>
 </div>
+{% endblock %}
 
 <br>
+{% block editgroupannotations %}
 <h3 class="ui header">Comments and Annotations</h3>
 {% for annotation in editgroup.annotations|reverse %}
   <div class="ui segments">
@@ -241,6 +243,7 @@
     </form><br>
   </div>
 {% endif %}
+{% endblock %}
 
 {% endblock %}
 
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