multiple user support

README.md

@@ -9,19 +9,44 @@ Setup:
 - Write a data/config.json:
 
 ```
-{ "title": "My Labeler",
+{
-"labels": [
+  "title": "My Labeler",
+  "users": [
+    "user1",
+    "name2"
+  ],
+  "labels": [
     {
-    "type": "checkbox", "name": "my_check", "value": "off"},
+      "type": "checkbox",
-            {"type": "text", "name": "my_text", "value": "1.0"},
+      "name": "my_check",
+      "default": "off"
+    },
+    {
+      "type": "number",
+      "name": "my_number",
+      "default": "1.0"
+    },
+    {
+      "type": "text",
+      "name": "my_text",
+      "default": "some text"
+    },
     {
       "type": "range",
       "name": "my_slider",
-                "value": "75",
+      "default": "75",
       "min": "0",
-                "max": "100",
+      "max": "100"
+    },
+    {
+      "type": "select",
+      "name": "my_selection",
+      "default": "select2",
+      "options": [
+        "option1",
+        "select2"
+      ]
     }
   ]
 }
-
 ```

code/labeler.py

@@ -1,5 +1,3 @@
-import time
-import datetime
 import os
 import re
 import json
@@ -13,7 +11,6 @@ from flask import (
     url_for,
     abort,
     render_template,
-    flash,
 )
 from revprox import ReverseProxied
 
@@ -40,6 +37,7 @@ def before_request_func():
         with open(app.config["CONFIG_FILE"], "rt") as fp:
             g.config = json.load(fp)
             g.labels = g.config["labels"]
+            g.users = g.config["users"]
     except Exception as e:
         logging.warning(e)
         logging.warning("config.json could not be read. using defaults.")
@@ -55,9 +53,11 @@ def before_request_func():
             },
         ]
         g.config = {"title": "Labeler", "labels": g.labels}
+        g.users = ["user"]
 
     for label in g.labels:
-        label['value'] = label['default']
+        label["value"] = label["default"]
+
 
 def natural_key(string_):
     """See http://www.codinghorror.com/blog/archives/001018.html"""
@@ -66,7 +66,7 @@ def natural_key(string_):
 
 def get_metadata_path(image_path):
     base, ext = os.path.splitext(os.path.basename(image_path))
-    jsonpath = os.path.join(app.config["LABELDIR"], base + ".json")
+    jsonpath = os.path.join(app.config["LABELDIR"], get_user(), base + ".json")
     return jsonpath
 
 
@@ -126,9 +126,45 @@ def set_metadata(values, imagepath):
         return json.dump(values, fp, indent=2, sort_keys=True)
 
 
+def set_user(user_name):
+    if user_name not in g.users:
+        raise ValueError("No such user {}".format(user_name))
+    session["user"] = user_name
+    try:
+        os.makedirs(os.path.join(app.config["LABELDIR"], user_name))
+    except FileExistsError:
+        pass
+
+
+def get_user():
+
+    return session.get("user", None)
+
+
 @app.route("/", methods=["GET", "POST"])
+@app.route("/user:<int:user>", methods=["GET", "POST"])
+def main(user=None):
+
+    if request.method == "POST":
+        user_name = request.form["user_name"]
+        set_user(user_name)
+        return redirect(url_for("show_image"))
+
+    user_name = get_user()
+
+    return render_template(
+        "main.html",
+        current_user=user_name,
+        users=g.users,
+        title=g.config.get("title", "Labeler"),
+    )
+
+
+@app.route("/image", methods=["GET", "POST"])
 @app.route("/image:<int:id>", methods=["GET", "POST"])
 def show_image(id=None):
+    if get_user() is None:
+        return redirect(url_for("main"))
 
     if request.method == "POST":
         # parse form

code/templates/main.html

@@ -0,0 +1,19 @@
+{% extends "layout.html" %}
+{% block body %}
+<div class="entries">
+
+  <div class="center inputcontainer">
+  <form action="{{ url_for('main') }}" method=post class=add-entry>
+  <label>Choose user:</label>
+  <select name="user_name">
+    {% for user in users %}
+        <option value="{{user}}" {% if user == current_user %}SELECTED{% endif %}>{{user}}</option>
+    {% endfor %}
+  </select>
+  <br>
+  <input type=submit value="Choose" name=save class="button_save">
+  </form>
+  </div>
+</div>
+
+{% endblock %}