[IMP] runbot_merge: add color key to freeze wizard

Was difficult to understand what the colors meant on the required PRs.

Part of #718

runbot_merge/__manifest__.py

@@ -21,6 +21,7 @@
             'runbot_merge/static/scss/runbot_merge.scss',
         ],
         'web.assets_backend': [
+            'runbot_merge/static/scss/runbot_merge_backend.scss',
             'runbot_merge/static/project_freeze/index.js',
         ],
     },

runbot_merge/models/project_freeze/__init__.py

@@ -6,6 +6,8 @@ import logging
 import time
 from collections import Counter
 
+from markupsafe import Markup
+
 from odoo import models, fields, api, Command
 from odoo.exceptions import UserError
 from odoo.addons.runbot_merge.exceptions import FastForwardError
@@ -25,6 +27,17 @@ class FreezeWizard(models.Model):
         help="Pull requests which must have been merged before the freeze is allowed",
     )
 
+    pr_state_key = fields.Html(string="Color Key", compute='_compute_state_key', readonly=True)
+    def _compute_state_key(self):
+        s = dict(self.env['runbot_merge.pull_requests']._fields['state'].selection)
+        self.pr_state_key = Markup("""
+            <p>%s</p>
+        """) % Markup(" ").join(
+            Markup('<span class="badge border-0 fucking_color_key_{}">{}</span>').format(v, s[k])
+            for k, v in STATE_COLORMAP.items()
+            if v
+        )
+
     release_label = fields.Char(
         string="Find by label",
         help="Setting a (complete) PR label will automatically find and "
@@ -411,7 +424,7 @@ STATE_COLORMAP = {
     'merged': Colors.Green,
     'error': Colors.Red,
 }
-class PullRequestColor(models.Model):
+class PullRequest(models.Model):
     _inherit = 'runbot_merge.pull_requests'
 
     state_color = fields.Integer(compute='_compute_state_color')

runbot_merge/models/project_freeze/views.xml

@@ -14,6 +14,7 @@
                             <field name="branch_name"/>
                             <field name="required_pr_ids" widget="many2many_tags"
                                 options="{'color_field': 'state_color', 'no_create': True}"/>
+                            <field name="pr_state_key" readonly="1"/>
                         </group>
                     </group>
                     <group string="Release">

runbot_merge/static/scss/runbot_merge_backend.scss

@@ -0,0 +1,7 @@
+@for $item from 2 through length($o-colors) {
+    .fucking_color_key_#{$item - 1} {
+        $background-color: nth($o-colors, $item);
+        color: color-contrast($background-color);
+        background-color: $background-color;
+    }
+}