initial browser/installer commit, injector get_tab and stateful utils

- Integrated plugin downloader/installer. It accepts POST requests at /browser/install_plugin, containing an artifact (basically an author/repo string like you'd find on github), and a release version, then fetches the zip file from the repo releases and unzips it inside the plugin dir, after asking for user confirmation (pop-up message in the plugin menu).
- Injector get_tab method. Basically get_tabs with the usual search for a specific tab. Decided to implement this because it was needed again and again, and we kept pasting the same list search one-liner.
- Utilities now have access to the main PluginManager class

plugin_loader/browser.py

@@ -0,0 +1,76 @@
+from injector import get_tab
+from logging import getLogger
+from os import path, rename
+from shutil import rmtree
+from aiohttp import ClientSession, web
+from io import BytesIO
+from zipfile import ZipFile
+from concurrent.futures import ProcessPoolExecutor
+from asyncio import get_event_loop
+from time import time
+
+class PluginInstallContext:
+    def __init__(self, gh_url, version) -> None:
+        self.gh_url = gh_url
+        self.version = version
+
+class PluginBrowser:
+    def __init__(self, plugin_path, server_instance, store_url) -> None:
+        self.log = getLogger("browser")
+        self.plugin_path = plugin_path
+        self.store_url = store_url
+        self.install_requests = {}
+
+        server_instance.add_routes([
+            web.post("/browser/install_plugin", self.install_plugin),
+            web.get("/browser/iframe", self.redirect_to_store)
+        ])
+
+    def _unzip_to_plugin_dir(self, zip, name):
+        zip_file = ZipFile(zip)
+        zip_file.extractall(self.plugin_path)
+        (rename(path.join(self.plugin_path, zip_file.namelist()[0]), path.join(self.plugin_path, name)))
+
+    async def _install(self, artifact, version):
+        name = artifact.split("/")[-1]
+        rmtree(path.join(self.plugin_path, name), ignore_errors=True)
+        self.log.info("Installing {} (Version: {})".format(artifact, version))
+        async with ClientSession() as client:
+            url = "https://github.com/{}/archive/refs/tags/{}.zip".format(artifact, version)
+            self.log.debug("Fetching {}".format(url))
+            res = await client.get(url)
+            if res.status == 200:
+                self.log.debug("Got 200. Reading...")
+                data = await res.read()
+                self.log.debug("Read {} bytes".format(len(data)))
+                res_zip = BytesIO(data)
+                with ProcessPoolExecutor() as executor:
+                    self.log.debug("Unzipping...")
+                    await get_event_loop().run_in_executor(
+                        executor,
+                        self._unzip_to_plugin_dir,
+                        res_zip,
+                        name
+                    )
+                    self.log.info("Installed {} (Version: {})".format(artifact, version))
+            else:
+                self.log.fatal("Could not fetch from github. {}".format(await res.text()))
+
+    async def redirect_to_store(self, request):
+        return web.Response(status=302, headers={"Location": self.store_url})
+    
+    async def install_plugin(self, request):
+        data = await request.post()
+        get_event_loop().create_task(self.request_plugin_install(data["artifact"], data["version"]))
+        return web.Response(text="Requested plugin install")
+
+    async def request_plugin_install(self, artifact, version):
+        request_id = str(time())
+        self.install_requests[request_id] = PluginInstallContext(artifact, version)
+        tab = await get_tab("QuickAccess")
+        await tab.open_websocket()
+        await tab.evaluate_js("addPluginInstallPrompt('{}', '{}', '{}')".format(artifact, version, request_id))
+    
+    async def confirm_plugin_install(self, request_id):
+        request = self.install_requests.pop(request_id)
+        await self._install(request.gh_url, request.version)

plugin_loader/injector.py

@@ -79,21 +79,25 @@ async def get_tabs():
         else:
             raise Exception("/json did not return 200. {}".format(await res.text()))
 
-async def inject_to_tab(tab_name, js):
+async def get_tab(tab_name):
     tabs = await get_tabs()
     tab = next((i for i in tabs if i.title == tab_name), None)
     if not tab:
-        raise ValueError("Tab {} not found in running tabs".format(tab_name))
+        raise ValueError("Tab {} not found".format(tab_name))
+    return tab    
+
+async def inject_to_tab(tab_name, js):
+    tab = await get_tab(tab_name)
     logger.debug(f"Injected JavaScript Result: {await tab.evaluate_js(js)}")
 
 async def tab_has_element(tab_name, element_name):
-    tabs = await get_tabs()
-    tab = next((i for i in tabs if i.title == tab_name), None)
-    if not tab:
+    try:
+        tab = await get_tab(tab_name)
+    except ValueError:
         return False
     res = await tab.evaluate_js(f"document.getElementById('{element_name}') != null")
     
     if not "result" in res or not "result" in res["result"] or not "value" in res["result"]["result"]:
-        return False;
+        return False
 
     return res["result"]["result"]["value"]

plugin_loader/loader.py

@@ -7,7 +7,7 @@ from os import path, listdir
 from importlib.util import spec_from_file_location, module_from_spec
 from logging import getLogger
 
-from injector import get_tabs
+from injector import get_tabs, get_tab
 
 class FileChangeHandler(FileSystemEventHandler):
     def __init__(self, loader, plugin_path) -> None:
@@ -190,6 +190,6 @@ class Loader:
         return {"plugins": self.plugins.values()}
 
     async def refresh_iframe(self):
-        tab = next((i for i in await get_tabs() if i.title == "QuickAccess"), None)
+        tab = await get_tab("QuickAccess")
         await tab.open_websocket()
         return await tab.evaluate_js("reloadIframe()")

plugin_loader/main.py

@@ -6,8 +6,10 @@ CONFIG = {
     "server_host": getenv("SERVER_HOST", "127.0.0.1"),
     "server_port": int(getenv("SERVER_PORT", "1337")),
     "live_reload": getenv("LIVE_RELOAD", "1") == "1",
-    "log_level": {"CRITICAL": 50, "ERROR": 40, "WARNING":30, "INFO": 20, "DEBUG": 10}[getenv("LOG_LEVEL", "INFO")]
+    "log_level": {"CRITICAL": 50, "ERROR": 40, "WARNING":30, "INFO": 20, "DEBUG": 10}[getenv("LOG_LEVEL", "INFO")],
+    "store_url": getenv("STORE_URL", "https://sdh.tzatzi.me/browse")
 }
+
 basicConfig(level=CONFIG["log_level"], format="[%(module)s][%(levelname)s]: %(message)s")
 
 from aiohttp.web import Application, run_app, static
@@ -18,8 +20,9 @@ from asyncio import get_event_loop, sleep
 from json import loads, dumps
 
 from loader import Loader
-from injector import inject_to_tab, get_tabs, tab_has_element
-from utilities import util_methods
+from injector import inject_to_tab, get_tab, tab_has_element
+from utilities import Utilities
+from browser import PluginBrowser
 
 
 logger = getLogger("Main")
@@ -29,6 +32,8 @@ class PluginManager:
         self.loop = get_event_loop()
         self.web_app = Application()
         self.plugin_loader = Loader(self.web_app, CONFIG["plugin_path"], self.loop, CONFIG["live_reload"])
+        self.plugin_browser = PluginBrowser(CONFIG["plugin_path"], self.web_app, CONFIG["store_url"])
+        self.utilities = Utilities(self)
 
         jinja_setup(self.web_app, loader=FileSystemLoader(path.join(path.dirname(__file__), 'templates')))
         self.web_app.on_startup.append(self.inject_javascript)
@@ -64,7 +69,7 @@ class PluginManager:
                 )
                 res["success"] = True
             else:
-                r = await util_methods[method["method"]](**method["args"])
+                r = await self.utilities.util_methods[method["method"]](**method["args"])
                 res["result"] = r
                 res["success"] = True
         except Exception as e:
@@ -74,7 +79,7 @@ class PluginManager:
             await self.resolve_method_call(tab, method["id"], res)
 
     async def method_call_listener(self):
-        tab = next((i for i in await get_tabs() if i.title == "QuickAccess"), None)
+        tab = await get_tab("QuickAccess")
         await tab.open_websocket()
         await tab._send_devtools_cmd({"id": 1, "method": "Runtime.discardConsoleEntries"})
         await tab._send_devtools_cmd({"id": 1, "method": "Runtime.enable"})
@@ -99,7 +104,7 @@ class PluginManager:
             pass
 
     def run(self):
-        return run_app(self.web_app, host=CONFIG["server_host"], port=CONFIG["server_port"], loop=self.loop)
+        return run_app(self.web_app, host=CONFIG["server_host"], port=CONFIG["server_port"], loop=self.loop, access_log=None)
 
 if __name__ == "__main__":
     PluginManager().run()

plugin_loader/static/plugin_page.js

@@ -16,6 +16,34 @@ function resolveMethodCall(call_id, result) {
     iframe.postMessage({'call_id': call_id, 'result': result}, "http://127.0.0.1:1337");
 }
 
+function installPlugin(request_id) {
+    let id = `${new Date().getTime()}`;
+    console.debug(JSON.stringify({
+        "id": id,
+        "method": "confirm_plugin_install",
+        "args": {"request_id": request_id}
+    }));
+    document.getElementById('plugin_install_list').removeChild(document.getElementById(`plugin_install_prompt_${request_id}`));
+}
+
+function addPluginInstallPrompt(artifact, version, request_id) {
+    let text = `
+    <div id="plugin_install_prompt_${request_id}" style="display: block; background: #304375; border-radius: 5px;">
+        <h3 style="padding-left: 1rem;">Install plugin</h3>
+        <ul style="padding-left: 10px; padding-right: 10px; padding-bottom: 20px; margin: 0;">
+            <li>${artifact}</li>
+            <li>${version}</li>
+        </ul>
+        <div style="text-align: center; padding-bottom: 10px;">
+            <button onclick="installPlugin('${request_id}')" style="display: inline-block; background-color: green;">Install</button>
+            <button onclick="document.getElementById('plugin_install_list').removeChild(document.getElementById('plugin_install_prompt_${request_id}'))" 
+            style="display: inline-block; background-color: red;">Ignore</button>
+        </div>
+    </div>
+    `;
+    document.getElementById('plugin_install_list').innerHTML += text;
+}
+
 (function () {
     const PLUGIN_ICON = `
         <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-plugin" viewBox="0 0 16 16">
@@ -35,6 +63,8 @@ function resolveMethodCall(call_id, result) {
         let pluginPage = pages.children[pages.children.length - 1];
         pluginPage.innerHTML = createTitle("Plugins");
 
+        pluginPage.innerHTML += `<div id="plugin_install_list" style="position: fixed; height: 100%; z-index: 99; transform: translate(5%, 0);"></div>`
+
         pluginPage.innerHTML += `<iframe id="plugin_iframe" style="border: none; width: 100%; height: 100%;" src="http://127.0.0.1:1337/plugins/iframe"></iframe>`;
     }
 

plugin_loader/utilities.py

@@ -1,18 +1,25 @@
 from aiohttp import ClientSession
 
-async def http_request(method="", url="", **kwargs):
-    async with ClientSession() as web:
-        res = await web.request(method, url, **kwargs)
-        return {
-            "status": res.status,
-            "headers": dict(res.headers),
-            "body": await res.text()
+class Utilities:
+    def __init__(self, context) -> None:
+        self.context = context
+        self.util_methods = {
+            "ping": self.ping,
+            "http_request": self.http_request,
+            "confirm_plugin_install": self.confirm_plugin_install
         }
 
-async def ping(**kwargs):
-    return "pong"
+    async def confirm_plugin_install(self, request_id):
+        return await self.context.plugin_browser.confirm_plugin_install(request_id)
 
-util_methods = {
-    "ping": ping,
-    "http_request": http_request
-}
+    async def http_request(self, method="", url="", **kwargs):
+        async with ClientSession() as web:
+            res = await web.request(method, url, **kwargs)
+            return {
+                "status": res.status,
+                "headers": dict(res.headers),
+                "body": await res.text()
+            }
+
+    async def ping(self, **kwargs):
+        return "pong"