[appimage] improvement -> manual file installation: trying to auto-fill the 'Name' and 'Version' fields

CHANGELOG.md

@@ -7,7 +7,9 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 ## [0.9.7] 2020
 ### Improvements
 - AppImage
-    - Manual file installation default search path set to '~/Downloads'
+    - Manual file installation:
+        - default search path set to '~/Downloads'
+        - trying to auto-fill the 'Name' and 'Version' fields
 - Arch
     - upgrade summary: displaying the reason a given package must be installed
      <p align="center">

bauh/api/abstract/view.py

@@ -1,6 +1,6 @@
 from abc import ABC
 from enum import Enum
-from typing import List, Set
+from typing import List, Set, Optional
 
 
 class MessageType:
@@ -9,12 +9,22 @@ class MessageType:
     ERROR = 2
 
 
+class ViewObserver:
+
+    def on_change(self, change):
+        pass
+
+
 class ViewComponent(ABC):
     """
     Represents a GUI component
     """
-    def __init__(self, id_: str):
+    def __init__(self, id_: str, observers: List[ViewObserver] = None):
         self.id = id_
+        self.observers = observers if observers else []
+
+    def add_observer(self, obs):
+        self.observers.append(obs)
 
 
 class SpacerComponent(ViewComponent):
@@ -157,6 +167,14 @@ class TextInputComponent(ViewComponent):
         else:
             return ''
 
+    def set_value(self, val: Optional[str], caller: object = None):
+        self.value = val
+
+        if self.observers:
+            for o in self.observers:
+                if caller != o:
+                    o.on_change(val)
+
     def get_int_value(self) -> int:
         if self.value is not None:
             val = self.value.strip() if isinstance(self.value, str) else self.value
@@ -191,6 +209,13 @@ class FileChooserComponent(ViewComponent):
         self.max_width = max_width
         self.search_path = search_path
 
+    def set_file_path(self, fpath: str):
+        self.file_path = fpath
+
+        if self.observers:
+            for o in self.observers:
+                o.on_change(self.file_path)
+
 
 class TabComponent(ViewComponent):
 

bauh/gems/appimage/controller.py

@@ -23,7 +23,7 @@ from bauh.api.abstract.handler import ProcessWatcher, TaskManager
 from bauh.api.abstract.model import SoftwarePackage, PackageHistory, PackageUpdate, PackageSuggestion, \
     SuggestionPriority, CustomSoftwareAction
 from bauh.api.abstract.view import MessageType, ViewComponent, FormComponent, InputOption, SingleSelectComponent, \
-    SelectViewType, TextInputComponent, PanelComponent, FileChooserComponent
+    SelectViewType, TextInputComponent, PanelComponent, FileChooserComponent, ViewObserver
 from bauh.commons import resource
 from bauh.commons.config import save_config
 from bauh.commons.html import bold
@@ -42,6 +42,28 @@ DESKTOP_ENTRIES_PATH = '{}/.local/share/applications'.format(str(Path.home()))
 RE_DESKTOP_EXEC = re.compile(r'Exec\s*=\s*.+\n')
 RE_DESKTOP_ICON = re.compile(r'Icon\s*=\s*.+\n')
 RE_ICON_ENDS_WITH = re.compile(r'.+\.(png|svg)$')
+RE_APPIMAGE_NAME = re.compile(r'(.+)\.appimage', flags=re.IGNORECASE)
+
+
+class ManualInstallationFileObserver(ViewObserver):
+
+    def __init__(self, name: TextInputComponent, version: TextInputComponent):
+        self.name = name
+        self.version = version
+
+    def on_change(self, file_path: str):
+        if file_path:
+            name_found = RE_APPIMAGE_NAME.findall(file_path.split('/')[-1])
+
+            if name_found:
+                name_split = name_found[0].split('-')
+                self.name.set_value(name_split[0].strip())
+
+                if len(name_split) > 1:
+                    self.version.set_value(name_split[1].strip())
+        else:
+            self.name.set_value(None)
+            self.version.set_value(None)
 
 
 class AppImageManager(SoftwareManager):
@@ -74,9 +96,13 @@ class AppImageManager(SoftwareManager):
         if not os.path.isdir(default_path):
             default_path = None
 
-        file_chooser = FileChooserComponent(label=self.i18n['file'].capitalize(), allowed_extensions={'AppImage'}, search_path=default_path)
+        file_chooser = FileChooserComponent(label=self.i18n['file'].capitalize(),
+                                            allowed_extensions={'AppImage'},
+                                            search_path=default_path)
         input_name = TextInputComponent(label=self.i18n['name'].capitalize())
         input_version = TextInputComponent(label=self.i18n['version'].capitalize())
+        file_chooser.observers.append(ManualInstallationFileObserver(input_name, input_version))
+
         input_description = TextInputComponent(label=self.i18n['description'].capitalize())
 
         cat_ops = [InputOption(label=self.i18n['category.none'].capitalize(), value=0)]

bauh/view/qt/components.py

@@ -11,7 +11,7 @@ from PyQt5.QtWidgets import QRadioButton, QGroupBox, QCheckBox, QComboBox, QGrid
 
 from bauh.api.abstract.view import SingleSelectComponent, InputOption, MultipleSelectComponent, SelectViewType, \
     TextInputComponent, FormComponent, FileChooserComponent, ViewComponent, TabGroupComponent, PanelComponent, \
-    TwoStateButtonComponent, TextComponent, SpacerComponent, RangeInputComponent
+    TwoStateButtonComponent, TextComponent, SpacerComponent, RangeInputComponent, ViewObserver
 from bauh.view.qt import css
 from bauh.view.qt.colors import RED
 from bauh.view.util import resource
@@ -428,6 +428,15 @@ class ComboSelectQt(QGroupBox):
         self.layout().addWidget(FormComboBoxQt(model), 0, 1)
 
 
+class QLineEditObserver(QLineEdit, ViewObserver):
+
+    def __init__(self, **kwargs):
+        super(QLineEditObserver, self).__init__(**kwargs)
+
+    def on_change(self, change: str):
+        self.setText(change if change is not None else '')
+
+
 class TextInputQt(QGroupBox):
 
     def __init__(self, model: TextInputComponent):
@@ -440,7 +449,7 @@ class TextInputQt(QGroupBox):
         if self.model.max_width > 0:
             self.setMaximumWidth(self.model.max_width)
 
-        self.text_input = QLineEdit()
+        self.text_input = QLineEditObserver()
 
         if model.only_int:
             self.text_input.setValidator(QIntValidator())
@@ -457,10 +466,11 @@ class TextInputQt(QGroupBox):
 
         self.text_input.textChanged.connect(self._update_model)
 
+        self.model.observers.append(self.text_input)
         self.layout().addWidget(self.text_input, 0, 1)
 
     def _update_model(self, text: str):
-        self.model.value = text
+        self.model.set_value(val=text, caller=self)
 
 
 class MultipleSelectQt(QGroupBox):
@@ -754,7 +764,7 @@ class FormQt(QGroupBox):
         return tip_icon
 
     def _new_text_input(self, c: TextInputComponent) -> Tuple[QLabel, QLineEdit]:
-        line_edit = QLineEdit()
+        line_edit = QLineEditObserver()
 
         if c.only_int:
             line_edit.setValidator(QIntValidator())
@@ -773,9 +783,10 @@ class FormQt(QGroupBox):
             line_edit.setEnabled(False)
 
         def update_model(text: str):
-            c.value = text
+            c.set_value(val=text, caller=line_edit)
 
         line_edit.textChanged.connect(update_model)
+        c.observers.append(line_edit)
 
         label = QWidget()
         label.setSizePolicy(QSizePolicy.Minimum, QSizePolicy.Minimum)
@@ -819,7 +830,7 @@ class FormQt(QGroupBox):
         return field_container
 
     def _new_file_chooser(self, c: FileChooserComponent) -> Tuple[QLabel, QLineEdit]:
-        chooser = QLineEdit()
+        chooser = QLineEditObserver()
         chooser.setReadOnly(True)
 
         if c.max_width > 0:
@@ -828,6 +839,7 @@ class FormQt(QGroupBox):
         if c.file_path:
             chooser.setText(c.file_path)
 
+        c.observers.append(chooser)
         chooser.setPlaceholderText(self.i18n['view.components.file_chooser.placeholder'])
 
         def open_chooser(e):
@@ -848,14 +860,12 @@ class FormQt(QGroupBox):
             file_path, _ = QFileDialog.getOpenFileName(self, self.i18n['file_chooser.title'], cur_path, exts, options=options)
 
             if file_path:
-                c.file_path = file_path
-                chooser.setText(file_path)
+                c.set_file_path(file_path)
 
             chooser.setCursorPosition(0)
 
         def clean_path():
-            c.file_path = None
-            chooser.setText('')
+            c.set_file_path(None)
 
         chooser.mousePressEvent = open_chooser