Improve entry flow a little

Reviewed-on: https://git.fsmi.org/paul/jon/pulls/6
Reviewed-by: Paul Brinkmeier <paul.brinkmeier@fsmi.uni-karlsruhe.de>

Dockerfile

@@ -0,0 +1,25 @@
+FROM debian:latest as builder
+
+RUN apt-get update 
+RUN apt-get upgrade -y
+RUN apt-get install -y elm-compiler make ca-certificates
+
+COPY . /app
+WORKDIR /app
+RUN rm -rf .venv venv
+
+RUN make frontend
+
+
+FROM python:3.11-alpine as runner
+COPY --from=builder /app /app
+
+WORKDIR /app
+RUN pip install -r requirements.txt
+RUN pip install gunicorn
+
+EXPOSE 5000
+ENV JON_DB_CONNECTION_STRING="host=fsmi-db.fsmi.org dbname=garfield"
+ENV JON_SECRET_KEY="changeme"
+
+CMD ["sh", "-c", "gunicorn -b '0.0.0.0:5000' --chdir /app 'jon:create_app()'"]

README.md

@@ -4,6 +4,11 @@
 
 ## Setup
 
+`jon` is a Python WSGI application written using Flask.
+This means you'll have to install a bunch of Python packages to get up and running.
+
+### Dependencies
+
 ```
 pip install -r requirements.txt
 ```
@@ -11,6 +16,14 @@ pip install -r requirements.txt
 You should probably use a virtualenv for that.
 I develop `jon` using Python 3.10 but it should work with older versions as well.
 
+#### Arch Linux
+
+If you're on Arch, these packages are required for running the server:
+
+```
+python python-flask python-flask-login python-psycopg2
+```
+
 ### Building Frontend JS
 
 Most of jon works without JS but there are some features that require it.
@@ -32,6 +45,20 @@ flask --app jon run --debug
 
 `--debug` restarts the server when a source file changes.
 
+## Running with docker
+When you prefer running the application using docker you can just use
+```
+docker compose up
+```
+
+In case your local username does not line up with your FSMI-username, you need to specify your FSMI-username
+using `USER=<username>`, e.g.:
+```
+USER=shirkanesi docker compose up
+```
+
+This can also be persisted by following the instructions in the docker-compose.yml
+
 ## fsmi-db forward
 
 ```
@@ -55,3 +82,4 @@ ssh -nNTvL 5432:fsmi-db.fsmi.org:5432 fsmi-login.fsmi.uni-karlsruhe.de
   - [x] Figure out/Add documentation about building `entry.js`
   - [ ] Clean up the code a little and add some comments
   - [ ] Needs good documentation for maintainability
+- [ ] Use cool new function for deactivating items

docker-compose.yml

@@ -0,0 +1,19 @@
+---
+version: '3.7'
+
+services:
+  jon:
+    container_name: jon
+    build: .
+    ports:
+      - "5000:5000"
+    volumes:
+      - ~/.pgpass:/root/.pgpass:ro
+    dns:
+      - 1.1.1.1
+      - 8.8.8.8
+    network_mode: bridge
+    environment:
+      # If your local user is different from your fsmi user, change $USER here!
+      - JON_DB_CONNECTION_STRING="host=fsmi-db.fsmi.org dbname=garfield user=$USER"
+      - JON_SECRET_KEY="changemetosomethingsuperrandomandsecure"

frontend/Entry.elm

@@ -133,8 +133,11 @@ type alias Context =
 
 type alias Globals =
   { locations : List Location
+  , defaultLocation : Location
   , groups : List Group
+  , defaultGroup : Group
   , taxGroups : List TaxGroup
+  , defaultTaxGroup : TaxGroup
   }
 
 type State
@@ -158,7 +161,7 @@ type Msg
   = SetSearchTerm String
   | SubmitSearch
   | ReceiveSearchResults (Result Http.Error (List SearchResult))
-  | GotoItemEditor SearchResult
+  | GotoItemEditor IEInit
   | SetBarcode String
   | SetName String
   | SetSalesUnits String
@@ -169,6 +172,10 @@ type Msg
   | SetLocation String
   | SetTaxGroup String
 
+type IEInit
+  = IEInitBarcode String
+  | IEInitSearchResult SearchResult
+
 -- Update logic: State machine etc.
 
 update msg { globals, state } =
@@ -190,7 +197,21 @@ updateState msg globals state = case state of
       )
     ReceiveSearchResults (Ok searchResults) ->
       (ItemSearch { model | searchResults = searchResults }, Cmd.none)
-    GotoItemEditor searchResult ->
+    GotoItemEditor (IEInitBarcode barcode) ->
+      ( ItemEditor
+        { barcode = barcode
+        , name = ""
+        , calculator = Calculator.init 0
+        , netUnitPrice = NumberInput.fromFloat 0
+        , grossUnitPrice = NumberInput.fromFloat 0
+        , salesUnits = NumberInput.fromInt 0
+        , group = Select.init (.id >> String.fromInt) (.name) globals.defaultGroup globals.groups
+        , location = Select.init (.id >> String.fromInt) (.name) globals.defaultLocation globals.locations
+        , taxGroup = Select.init (.id >> String.fromInt) (.description) globals.defaultTaxGroup globals.taxGroups
+        }
+      , Cmd.none
+      )
+    GotoItemEditor (IEInitSearchResult searchResult) ->
       case find (\tg -> tg.id == searchResult.taxGroupId) globals.taxGroups of
         Nothing -> (state, Cmd.none)
         Just taxGroup ->
@@ -245,14 +266,21 @@ suggestedGrossPrice netPrice percentage =
 
 view { globals, state } = case state of
   ItemSearch model ->
-    fieldset []
-      [ legend [] [ text "Vorlage für Auftrag wählen" ]
-      , Html.form [ onSubmit SubmitSearch ]
-        [ div [ class "form-input" ]
-          [ label [ for "search-term", title "Barcode oder Name" ] [ text "Suchbegriff" ]
-          , input [ onInput SetSearchTerm, value model.searchTerm, id "search-term" ] []
+    div []
+      [ div []
+        [ if model.searchTerm == ""
+          then button [ disabled True ] [ text "Neuer Artikel" ]
+          else button [ onClick <| GotoItemEditor <| IEInitBarcode model.searchTerm  ] [ text <| "Neuer Artikel mit Barcode " ++ model.searchTerm ]
+        ]
+      , fieldset []
+        [ legend [] [ text "Vorlage für Auftrag wählen" ]
+        , Html.form [ onSubmit SubmitSearch ]
+          [ div [ class "form-input" ]
+            [ label [ for "search-term", title "Barcode oder Name" ] [ text "Suchbegriff" ]
+            , input [ onInput SetSearchTerm, value model.searchTerm, id "search-term" ] []
+            ]
+          , table [] <| searchResultHeaders :: List.map viewSearchResult model.searchResults
           ]
-        , table [] <| searchResultHeaders :: List.map viewSearchResult model.searchResults
         ]
       ]
   ItemEditor model ->
@@ -385,7 +413,7 @@ viewSearchResult model =
     , td [] [ text model.locationName ]
     , td [] [ text <| showBool model.available ]
     , td []
-      [ Html.form [ onSubmit <| GotoItemEditor model ]
+      [ Html.form [ onSubmit <| GotoItemEditor <| IEInitSearchResult model ]
         [ button [] [ text "Als Vorlage verwenden" ]
         ]
       ]

jon/__init__.py

@@ -20,14 +20,10 @@ def create_app():
     # You don't need a config.json. If you don't provide one, default-config.json
     # is used.
     app.config.from_file("config.json", load=json.load, silent=True)
+    app.config.from_prefixed_env(prefix="JON")
 
     db.init_app(app)
-
-    # This function denies every request until `auth.ACCESS_TOKEN`
-    # is passed using `?token=` to authenticate the session.
-    @app.before_request
-    def before_req_fun():
-        return auth.before_request()
+    auth.init_app(app)
 
     @app.context_processor
     def utility_processor():

jon/auth.py

@@ -1,7 +1,10 @@
 import secrets
 import string
 
-from flask import Blueprint, request, redirect, render_template, session
+from flask import Blueprint, request, redirect, render_template
+from flask_login import current_user, login_user, logout_user, LoginManager
+from typing import Any, Dict, List, Optional
+
 
 bp = Blueprint("auth", __name__, url_prefix="/auth")
 
@@ -15,27 +18,67 @@ ALLOWED_PATHS = [
 ]
 
 
-def before_request():
-    """
-    If the correct token query parameter is passed along with any request,
-    we mark this session authenticated by setting `session["authenticated"]`.
-    Unless the session is authenticated, all requests result in a 403 FORBIDDEN.
-    """
-    if "token" in request.args:
-        if request.args["token"] == ACCESS_TOKEN:
-            session["authenticated"] = ()
-        # Reload the page without query parameters
-        return redirect(request.path)
+# A poor man's replacement for memory-backed session solution.
+# We keep exactly one User (and the corresponding UserData) in
+# memory and use that to store session data.
+class UserData:
+    location: Optional[Dict[str, Any]]
+    orders: List[Dict[str, Any]]
 
-    # Don't deny any paths in `ALLOWED_PATHS`
-    if request.path in ALLOWED_PATHS:
-        return
+    def __init__(self):
+        self.location = None
+        self.orders = []
 
-    if not "authenticated" in session:
-        return render_template("auth/denied.html"), 403
+
+class User:
+    is_authenticated: bool
+    is_active: bool
+    is_anonymous: bool
+
+    data: UserData
+
+    def __init__(self):
+        self.is_authenticated = True
+        self.is_active = True
+        self.is_anonymous = False
+
+        self.data = UserData()
+
+    def get_id(self) -> str:
+        return ""
+
+
+def init_app(app):
+    login_manager = LoginManager(app)
+    the_one_and_only_user = User()
+
+    @login_manager.user_loader
+    def load_user(user_id: str) -> User:
+        assert user_id == ""
+        return the_one_and_only_user
+
+    # This function denies every request until `auth.ACCESS_TOKEN`
+    # is passed using `?token=` to authenticate the user.
+    # We use this instead of @login_required because otherwise we'd have
+    # to add that annotation to all routes.
+    # See also: https://flask-login.readthedocs.io/en/latest/#flask_login.login_required
+    @app.before_request
+    def before_request():
+        if "token" in request.args:
+            if request.args["token"] == ACCESS_TOKEN:
+                login_user(the_one_and_only_user)
+            # Reload the page without query parameters
+            return redirect(request.path)
+
+        # Never deny any paths in `ALLOWED_PATHS`
+        if request.path in ALLOWED_PATHS:
+            return
+
+        if not current_user.is_authenticated:
+            return render_template("auth/denied.html"), 403
 
 
 @bp.get("/logout")
 def logout():
-    session.pop("authenticated", None)
+    logout_user()
     return redirect("/")

jon/db/add_views.sql

@@ -58,3 +58,56 @@ FROM garfield.inventory_items
   ) m USING (item_id)
 ORDER BY inventory_items.name;
 
+-- How many *other* active inventory lines exist with the same barcode in the same location that are newer?
+CREATE TEMPORARY VIEW more_recent_inventory_lines_with_same_barcode AS
+SELECT
+  a.item_id,
+  -- It's important not to count(*) here because item_id is NULL
+  -- when no other inventory lines exist.
+  count(b.item_id) AS other_lines_count
+FROM garfield.inventory_items AS a
+LEFT JOIN garfield.inventory_items AS b
+       ON a.item_barcode = b.item_barcode
+      AND a.item_id != b.item_id
+      AND a.location = b.location
+      AND b.available
+      AND b.bought > a.bought
+GROUP BY a.item_id;
+
+-- We need to create this table so that we can put an index on it
+-- Otherwise the join in the consumption graph query becomes much slower
+-- Perhaps it would be nicer to use a materialized view instead
+DROP TABLE IF EXISTS last_n_days;
+CREATE TEMPORARY TABLE last_n_days AS (
+  SELECT
+    generate_series(now() - interval '14 days', now(), interval '1 day')::date AS sale_date
+);
+CREATE UNIQUE INDEX last_n_days_sale_date ON last_n_days (sale_date);
+
+-- Get an array of how often items were sold over the last 14 days
+CREATE TEMPORARY VIEW inventory_last_n_days_sales AS
+WITH
+sales_by_date AS (
+  SELECT
+    inventory_line AS item_id,
+    date_trunc('day', snack_sales_log_timestamp AT TIME ZONE 'UTC+1') AS sale_date,
+    count(*)::int AS sales
+  FROM garfield.snack_sales_log
+  GROUP BY item_id, sale_date
+),
+beeg AS (
+  SELECT item_id, sale_date, count(snack_sales_log_timestamp)::int AS sales
+  FROM garfield.inventory_items
+  CROSS JOIN last_n_days
+  LEFT JOIN garfield.snack_sales_log
+         ON inventory_line = item_id
+-- snack_sales_log has an index on snack_sales_log_timestamp to speed up this query
+-- If that index doesn't exist the query takes much longer.
+        AND sale_date = date_trunc('day', snack_sales_log_timestamp AT TIME ZONE 'UTC+1')
+  WHERE available
+  GROUP BY item_id, sale_date
+  ORDER BY item_id, sale_date
+)
+SELECT item_id, array_agg(sales) AS last_n_days_sales
+FROM beeg
+GROUP BY item_id

jon/db/get_inventory_overview.sql

@@ -1,6 +1,8 @@
 SELECT
   *
 FROM all_inventory_item_overview
+LEFT JOIN more_recent_inventory_lines_with_same_barcode USING (item_id)
+LEFT JOIN inventory_last_n_days_sales USING (item_id)
 WHERE (%(location_id)s IS NULL OR location = %(location_id)s)
   AND available
 ORDER BY

jon/db/get_inventory_report.sql

@@ -1,49 +1,43 @@
+-- parameters:
+--
+-- location_id: Location to generate the report for
+
 WITH
-most_recent_sales AS (
-  SELECT DISTINCT ON (inventory_line)
-    inventory_line, snack_sales_log_id, snack_sales_log_timestamp AS most_recent_sale
+sales_by_item_id AS (
+  SELECT
+    inventory_line AS item_id,
+    max(snack_sales_log_timestamp) AS last_sold,
+    count(*)::int AS units_sold
   FROM garfield.snack_sales_log
-  ORDER BY inventory_line ASC, snack_sales_log_timestamp DESC
+  WHERE type_id = 'SNACK_BUY'
+    AND inventory_line IS NOT NULL
+    AND snack_sales_log_timestamp > NOW() - INTERVAL '120 days'
+    AND location_id = %(location_id)s
+  GROUP BY item_id
 ),
-enhanced_overview1 AS (
+sales_by_barcode AS (
   SELECT
-    inventory_items.item_id,
-    inventory_items.item_barcode,
-    inventory_items.name,
-    units_left,
-    inventory_items.sales_units,
-    correction_delta,
-    location_name,
-    location,
-      CASE
-        WHEN snack_sales_log_id IS NULL THEN 0
-        ELSE sales / (EXTRACT(EPOCH FROM (
-          CASE
-            WHEN units_left <= 0 THEN most_recent_sale
-            ELSE NOW()
-          END
-        )) - EXTRACT(EPOCH FROM bought)) * 24 * 3600
-    END AS per_day
-  FROM garfield.inventory_item_overview
+    item_barcode,
+    max(name) AS name,
+    sum(units_sold) AS units_sold,
+    round(avg((units_sold / extract(epoch FROM (CASE WHEN available THEN now() ELSE last_sold END) - bought)) * 86400)::numeric, 2) AS sold_per_day
+  FROM sales_by_item_id
   LEFT JOIN garfield.inventory_items USING (item_id)
-  LEFT JOIN most_recent_sales ON item_id = inventory_line
+  GROUP BY item_barcode
 ),
-enhanced_overview2 AS (
+current_inventory AS (
   SELECT
-    *,
-    CASE
-      WHEN per_day = 0 THEN NULL
-      ELSE GREATEST(0, units_left / per_day)
-    END AS days_left
-  FROM enhanced_overview1
+    item_barcode,
+    sum(units_left)::int AS units_left
+  FROM all_inventory_item_overview
+  WHERE available
+    AND location = %(location_id)s
+  GROUP BY item_barcode
 )
 
 SELECT
-  *,
-  CASE
-    WHEN days_left IS NULL THEN NULL
-    ELSE GREATEST(0, (60 - days_left) * per_day)
-  END AS for_two_months
-FROM enhanced_overview2
-WHERE (%(location_id)s IS NULL OR location = %(location_id)s)
-ORDER BY days_left ASC, per_day DESC
+  sales_by_barcode.*,
+  COALESCE(current_inventory.units_left, 0)::int AS units_left
+FROM sales_by_barcode
+LEFT JOIN current_inventory USING (item_barcode)
+ORDER BY units_sold DESC

jon/entry.py

@@ -1,5 +1,5 @@
-from flask import Blueprint, flash, redirect, render_template, request, session
-
+from flask import Blueprint, flash, redirect, render_template, request
+from flask_login import current_user
 
 from . import db
 
@@ -9,22 +9,18 @@ bp = Blueprint("entry", __name__, url_prefix="/entry")
 
 @bp.route("/", methods=["GET", "POST"])
 def index():
-    cart = session.get("cart", default=[])
     return render_template(
-        "entry/index.html",
-        cart=cart
+        "entry/index.html"
     )
 
 
 @bp.post("/add-new-items")
 def add_new_entries():
-    print(session)
-
     i_know_what_im_doing = "i-know-what-im-doing" in request.form
     if not i_know_what_im_doing:
         return "Du weißt nicht was du tust", 400
 
-    orders = session.get("cart", default=[])
+    orders = current_user.data.orders
     if not orders:
         return "Keine Aufträge", 404
     
@@ -36,7 +32,7 @@ def add_new_entries():
     db.get_db().commit()
 
     # Reset the cart
-    session["cart"] = []
+    current_user.data.orders = []
 
     return redirect(request.referrer)
 
@@ -48,9 +44,7 @@ def delete_order():
     except:
         return "Incomplete or mistyped form", 400
 
-    cart = session.get("cart", default=[])
-    del cart[order_index]
-    session["cart"] = cart
+    del current_user.data.orders[order_index]
 
     return redirect(request.referrer)
 
@@ -76,9 +70,7 @@ def new_order():
         except:
             return f"Incomplete or mistyped form", 400
         
-        cart = session.get("cart", default=[])
-        print(cart)
-        cart.append({
+        current_user.data.orders.append({
             "barcode": barcode,
             "name": name,
             "sales_units": sales_units,
@@ -91,7 +83,6 @@ def new_order():
             "net_unit_price": net_unit_price,
             "gross_unit_price": gross_unit_price
         })
-        session["cart"] = cart
         return redirect("/entry")
 
     with db.run_query("entry/get_groups.sql") as cursor:
@@ -103,10 +94,13 @@ def new_order():
     with db.run_query("entry/get_tax_groups.sql") as cursor:
         tax_groups = cursor.fetchall()
 
+    selected_location = current_user.data.location
+
     return render_template(
         "entry/new-order.html",
         groups=groups,
         locations=locations,
+        default_location=next(location for location in locations if location["id"] == selected_location["location_id"]) if selected_location is not None else locations[0],
         tax_groups=tax_groups
     )
 
@@ -122,10 +116,9 @@ def api_search_items():
     except:
         return {"error": "Missing query parameter `search-term`"}, 400
 
-    location = session.get("location", None)
-
+    location = current_user.data.location
     with db.run_query("search_items.sql", {
-        "location_id": None if location is None else location["location_id"],
+        "location_id": location["location_id"] if location else None,
         "search_term": search_term
     }) as cursor:
         items = cursor.fetchall()

jon/inventory.py

@@ -1,4 +1,5 @@
-from flask import Blueprint, redirect, render_template, request, session
+from flask import Blueprint, redirect, render_template, request
+from flask_login import current_user
 
 from . import db
 
@@ -8,7 +9,7 @@ bp = Blueprint("inventory", __name__, url_prefix="/inventory")
 
 @bp.get("/")
 def index():
-    location = session.get("location", None)
+    location = current_user.data.location
     items = db.run_query("get_inventory_overview.sql", {
         "location_id": None if location is None else location["location_id"]
     }).fetchall()
@@ -20,12 +21,18 @@ def index():
 
 @bp.get("/report")
 def read_report():
-    location = session.get("location", None)
+    location = current_user.data.location
+
+    if location is None:
+        # TODO: Error handling
+        return "please select a location in order to generate a report", 400
+
     items = db.run_query("get_inventory_report.sql", {
-        "location_id": None if location is None else location["location_id"]
+        "location_id": location["location_id"]
     }).fetchall()
 
     return render_template("inventory/read_report.html", **{
+        "location": location,
         "items": items
     })
 

jon/location.py

@@ -1,4 +1,5 @@
-from flask import Blueprint, render_template, request, session
+from flask import Blueprint, render_template, request
+from flask_login import current_user
 
 from . import db
 
@@ -11,13 +12,12 @@ def index():
     if request.method == "POST":
         location_id = request.form.get("location_id", "")
         if location_id == "":
-            session.pop("location", None)
+            current_user.data.location = None
         else:
             location = db.run_query("get_location_by_id.sql", {
-                "location_id": location_id}
-            ).fetchone()
-            session["location"] = location
-        
+                "location_id": location_id
+            }).fetchone()
+            current_user.data.location = location
 
     locations = db.run_query("get_locations.sql").fetchall()
 

jon/static/jon.css

@@ -40,6 +40,9 @@ nav > ul > li + li:before {
 .--centered {
   text-align: center;
 }
+.--not-important {
+  color: #aaa;
+}
 @keyframes wiggle {
   0%, 100% { margin-top: 0; }
   50% { margin-top: -0.5em; }
@@ -55,6 +58,10 @@ th {
   body {
     font-size: 8px;
   }
+  /* hide the menu when printing */
+  header {
+    display: none;
+  }
 }
 .form-input > label {
   font-size: .8em;
@@ -71,3 +78,10 @@ th {
   display: block;
   width: 8em;
 }
+details {
+  font-size: 0.8em;
+}
+.consumption-graph {
+  display: block;
+  height: 1em;
+}

jon/templates/base.html

@@ -12,13 +12,14 @@
         <ul>
           <li{{ " class=current-page" if request.path == "/" else "" }}><a href="/">Home</a></li>
           <li{{ " class=current-page" if request.path.startswith("/inventory") else "" }}><a href="/inventory">Inventar</a></li>
+          <li><a href="/inventory/report">Einkäuferbericht</a></li>
           <li{{ " class=current-page" if request.path.startswith("/entry") else "" }}><a href="/entry">Eintragen</a></li>
           <li{{ " class=current-page" if request.path.startswith("/location") else "" }}>
             <a href="/location">
-            {% if "location" not in session %}
+            {% if not current_user.data.location %}
               Raum wählen
             {% else %}
-              Raum: {{ session.location.location_name }}
+              Raum: {{ current_user.data.location.location_name }}
             {% endif %}
             </a>
           </li>
@@ -30,6 +31,16 @@
       <details>
         <summary><code>config</code></summary>
         <pre>{% for key, value in config.items() %}{{ key }} = {{ value }}
+{% endfor %}</pre>
+      </details>
+      <details>
+        <summary><code>session</code></summary>
+        <pre>{% for key, value in session.items() %}{{ key }} = {{ value }}
+{% endfor %}</pre>
+      </details>
+      <details>
+        <summary><code>current_user.data</code></summary>
+        <pre>{% for key, value in current_user.data.__dict__.items() %}{{ key }} = {{ value }}
 {% endfor %}</pre>
       </details>
       {% endif %}

jon/templates/entry/index.html

@@ -15,7 +15,7 @@
     <th>VK-Preis (Brutto)</th>
     <th>Aktionen</th>
   </tr>
-  {% for cart_item in cart %}
+  {% for cart_item in current_user.data.orders %}
   <tr>
     <td><code>{{ cart_item.barcode }}</code></td>
     <td>{{ cart_item.name }}</td>

jon/templates/entry/new-order.html

@@ -8,8 +8,11 @@ Elm.Entry.init({
   node: document.querySelector('.entry-app'),
   flags: {
     locations: {{ to_json(locations) | safe }},
+    defaultLocation: {{ to_json(default_location) | safe }},
     groups: {{ to_json(groups) | safe }},
-    taxGroups: {{ to_json(tax_groups) | safe }}
+    defaultGroup: {{ to_json(groups[0]) | safe }},
+    taxGroups: {{ to_json(tax_groups) | safe }},
+    defaultTaxGroup: {{ to_json(tax_groups[0]) | safe }},
   }
 });
 </script>

jon/templates/inventory/index.html

@@ -1,9 +1,34 @@
+{% macro consumption_graph_svg(values) -%}
+{% set stroke_width = 8 %}
+{% set width = 300 %}
+{% set height = 100 %}
+{% set padding = 4 %}
+{% set dx = (width - 2 * padding) / ((values | length) + 1) %}
+{% set dy = (height - 2 * padding) / ((values + [1]) | max) %}
+<svg viewBox="0 0 {{ width }} {{ height }}" role="img" class="consumption-graph">
+  <polyline
+    points="
+    {% for value in values %}
+      {{ padding + loop.index * dx }}, {{ height - padding - value * dy }}
+    {% endfor %}
+    "
+    stroke="green"
+    stroke-width="{{ stroke_width }}"
+    stroke-linecap="round"
+    stroke-linejoin="round"
+    fill="none"
+  >
+</svg>
+{% endmacro -%}
+
 {% extends "base.html" %}
 
 {% block content %}
 <table>
   <tr>
+    <th>Stat</th>
     <th>ID</th>
+    <th>Graph</th>
     <th>Barcode</th>
     <th>Name</th>
     <th>Preis (Netto)</th>
@@ -17,7 +42,12 @@
   </tr>
 {% for item in items %}
   <tr>
+    <td>
+      {% if item.units_left == 0 %}<span title="Leerer aktiver Inventareintrag">🅾️</span>{% endif %}
+      {% if item.other_lines_count != 0 %}<span title="{% if item.other_lines_count == 1 %}Neuerer Eintrag mit demselben Barcode ist aktiv{% else %}{{ item.other_lines_count }} Einträge mit demselben Barcode sind aktiv{% endif %}">🔄</span>{% endif %}
+    </td>
     <td><a href="/inventory/item/{{ item.item_id }}">{{ item.item_id }}</a></td>
+    <td>{{ consumption_graph_svg(item.last_n_days_sales) }}</td>
     <td><code>{{ item.item_barcode }}</code></td>
     <td>{{ item.name }}</td>
     <td class="--align-right">{{ format_currency(item.unit_price) }}</td>

jon/templates/inventory/read_report.html

@@ -1,29 +1,29 @@
 {% extends "base.html" %}
 
 {% block content %}
+<h2>Einkäuferbericht für {{ location.location_name }}</h2>
+
 <table>
   <tr>
-    <th>ID</th>
     <th>Barcode</th>
     <th>Name</th>
     <th>Inventar</th>
-    <th>Gesamt</th>
-    <th>Raum</th>
+    <th title="In den letzten 4 Monaten verkauft">Verkauft</th>
     <th>Verbrauch [1/d]</th>
+    <th>Verbrauch [1/60d]</th>
+    <!--
     <th title="Estimated Time Until Empty">ETUE [d]</th>
     <th>Für 2m</th>
+    -->
   </tr>
 {% for item in items %}
-  <tr>
-    <td><a href="/inventory/item/{{ item.item_id }}">{{ item.item_id }}</a></td>
+<tr{% if item.units_left >= item.units_sold %} class="--not-important"{% endif %}>
     <td><code>{{ item.item_barcode }}</code></td>
     <td>{{ item.name }}</td>
     <td class="--align-right">{{ item.units_left }}</td>
-    <td class="--align-right">{{ item.sales_units + item.correction_delta }}</td>
-    <td>{{ item.location_name }}</td>
-    <td class="--align-right">{{ item.per_day|round(2) }}</td>
-    <td class="--align-right">{% if item.days_left != None %}{{ item.days_left|round(1) }}{% endif %}</td>
-    <td class="--align-right">{% if item.for_two_months %}{{ item.for_two_months|round(1) }}{% endif %}</td>
+    <td class="--align-right">{{ item.units_sold }}</td>
+    <td class="--align-right">{{ item.sold_per_day }}</td>
+    <td class="--align-right">{{ item.sold_per_day * 60 }}</td>
   </tr>
 {% endfor %}
 </table>

jon/templates/location/index.html

@@ -3,9 +3,9 @@
 {% block content %}
 <form method="POST">
   <select name="location_id">
-    <option value="" {{ "selected" if "location" not in session else ""}}>-</option>
+    <option value="" {{ "selected" if not current_user.data.location else ""}}>-</option>
   {% for location in locations %}
-    <option value="{{ location.location_id }}" {{ "selected" if "location" in session and session.location.location_id == location.location_id else "" }}>{{ location.location_name }}</option>
+    <option value="{{ location.location_id }}" {{ "selected" if current_user.data.location.location_id == location.location_id else "" }}>{{ location.location_name }}</option>
   {% endfor %}
   </select>
 

requirements.txt

@@ -1,6 +1,7 @@
 blinker==1.6.2
 click==8.1.3
 Flask==2.3.2
+Flask-Login==0.6.2
 itsdangerous==2.1.2
 Jinja2==3.1.2
 MarkupSafe==2.1.2