style(core.*, health.lua): better code style and backend strategy

lua/Trans/core/translate.lua

@@ -1,20 +1,34 @@
-local M = require('Trans')
-local util = M.util
+local Trans = require('Trans')
+local util = Trans.util
 
+local backends = {
+    'offline',
+    'baidu',
+}
 
-local process
-process = function(opts)
+local function new_data(opts)
     opts = opts or {}
-    local mode = opts.mode or vim.api.nvim_get_mode().mode
-    local str = util.get_str(mode)
+    local method = opts.method or ({
+        n = 'normal',
+        v = 'visual',
+    })(vim.api.nvim_get_mode().mode)
+
+    local str = util.get_str(method)
     if str == '' then return end
 
+    local strategy = Trans.conf.strategy[method] or Trans.conf.strategy
     local data = {
         str = str,
-        view = opts.view or M.conf.view[mode],
-        mode = mode,
+        method = method,
+        frontend = strategy.frontend,
     }
 
+    local backend = strategy.backend
+    if type(backend) == 'string' then
+        backend = backend == '*' and backends or { backend }
+    end
+    data.backend = backend
+
     if util.is_English(str) then
         data.from = 'en'
         data.to = 'zh'
@@ -22,8 +36,10 @@ process = function(opts)
         data.from = 'zh'
         data.to = 'en'
     end
+    return data
+end
 
-
+local function set_result(data)
     require('Trans.backend').baidu.query(data)
     local thread = coroutine.running()
     local resume = function()
@@ -38,8 +54,22 @@ process = function(opts)
         coroutine.yield()
     end
     vim.pretty_print(data)
+end
 
-    M.translate = coroutine.wrap(process)
+local function render_window()
+    
+end
+
+local function process(opts)
+    Trans.translate = coroutine.wrap(process)
+
+    local data = new_data(opts)
+    if not data then return end
+
+    set_result(data)
+    if data.result == false then return end
+
+    render_window()
 end
 
 return coroutine.wrap(process)