refactor: better source code framework

lua/Trans/backend/baidu.lua

@@ -0,0 +1,65 @@
+local baidu     = require('Trans').conf.engine.baidu
+local appid     = baidu.appid
+local appPasswd = baidu.appPasswd
+local salt      = tostring(math.random(bit.lshift(1, 15)))
+local uri       = 'https://fanyi-api.baidu.com/api/trans/vip/translate'
+
+if appid == '' or appPasswd == '' then
+    error('请查看README, 实现在线翻译或者设置将在线翻译设置为false')
+end
+
+local post = require('Trans.util.curl').POST
+
+local function get_field(word, isEn)
+    local to   = isEn and 'zh' or 'en'
+    local tmp  = appid .. word .. salt .. appPasswd
+    local sign = require('Trans.util.md5').sumhexa(tmp)
+
+    return {
+        q     = word,
+        from  = 'auto',
+        to    = to,
+        appid = appid,
+        salt  = salt,
+        sign  = sign,
+    }
+end
+
+---返回一个channel
+---@param word string
+---@return table
+return function(word)
+    local isEn = word:isEn()
+    local query = get_field(word, isEn)
+    local result = {}
+
+    post(uri, {
+        data = query,
+        headers = {
+            content_type = "application/x-www-form-urlencoded",
+        },
+        callback = function(str)
+            local ok, res = pcall(vim.json.decode, str)
+            if ok and res and res.trans_result then
+                result[1] = {
+                    title = { word = word },
+                    [isEn and 'translation' or 'definition'] = res.trans_result[1].dst,
+                }
+
+                if result.callback then
+                    result.callback(result[1])
+                end
+            else
+                result[1] = false
+            end
+        end,
+    })
+
+    return result
+end
+
+
+
+-- NOTE :free tts:
+-- https://zj.v.api.aa1.cn/api/baidu-01/?msg=我爱你&choose=0&su=100&yd=5
+-- 选择转音频的人物，女生1 输入0 ｜ 女生2输入：5｜男生1 输入：1｜男生2 输入：2｜男生3 输入：3

lua/Trans/backend/offline.lua

@@ -0,0 +1,47 @@
+local _, db = pcall(require, 'sqlite.db')
+if not _ then
+    error('Please check out sqlite.lua')
+end
+
+-- INFO : init database
+local path = require('Trans').conf.db_path
+local dict = db:open(path)
+
+vim.api.nvim_create_autocmd('VimLeavePre', {
+    once = true,
+    callback = function()
+        if db:isopen() then
+            db:close()
+        end
+    end
+})
+
+
+return function(word)
+    local res = (dict:select('stardict', {
+        where = { word = word, },
+        keys = {
+            'word',
+            'phonetic',
+            'definition',
+            'translation',
+            'pos',
+            'collins',
+            'oxford',
+            'tag',
+            'exchange',
+        },
+        limit = 1,
+    }))[1]
+
+    if res then
+        res.title = {
+            word = res.word,
+            oxford = res.oxford,
+            collins = res.collins,
+            phonetic = res.phonetic,
+        }
+    end
+
+    return res
+end

lua/Trans/backend/youdao.lua

@@ -0,0 +1,74 @@
+local GET = require("Trans.util.curl").GET
+
+return function(word)
+    local isEn = word:isEn()
+    local result = {}
+
+    local uri = ('https://v.api.aa1.cn/api/api-fanyi-yd/index.php?msg=%s&type=%d'):format(word, isEn and 2 or 1)
+    GET(uri, {
+        callback = function(str)
+            local ok, res = pcall(vim.json.decode, str)
+            if not ok or not res or not res.text or isEn and res.text:isEn() then
+                result[1] = false
+                return
+            end
+
+            result[1] = {
+                title = { word = word },
+                [isEn and 'translation' or 'definition'] = res.text,
+            }
+
+            if result.callback then
+                result.callback(result[1])
+            end
+        end
+    })
+
+    return result
+end
+
+-- local youdao    = require("Trans").conf.engine.youdao
+-- local uri       = 'https://openapi.youdao.com/api'
+-- local salt      = tostring(math.random(bit.lshift(1, 15)))
+-- local appid     = youdao.appid
+-- local appPasswd = youdao.appPasswd
+
+-- local post = require('Trans.util.curl').POST
+
+-- local function get_field(word)
+--     -- local to = isEn and 'zh-'
+--     local len     = #word
+--     local curtime = tostring(os.time())
+--     local input   = len > 20 and
+--         word:sub(1, 10) .. len .. word:sub(-10) or word
+
+--     -- sign=sha256(应用ID+input+salt+curtime+应用密钥)；
+--     local hash = appid .. input .. salt .. curtime .. appPasswd
+--     local sign = vim.fn.sha256(hash)
+
+--     return {
+--         q        = word,
+--         from     = 'auto',
+--         to       = 'zh-CHS',
+--         signType = 'v3',
+--         appKey   = appid,
+--         salt     = salt,
+--         curtime  = curtime,
+--         sign     = sign,
+--     }
+-- end
+
+-- return function(word)
+--     -- return result
+--     -- local field  = get_field(word)
+--     -- local output = post(uri, {
+--     --     body = field,
+--     -- })
+
+--     -- if output.exit == 0 and output.status == 200 then
+--     --     local result = vim.fn.json_decode(output.body)
+--     --     if result and result.errorCode == 0 then
+--     --         --- TODO :
+--     --     end
+--     -- end
+-- end