Merge pull request #18 from lxsang/master

use quicktalk as comment API

Makefile

@@ -1,5 +1,5 @@
 BUILDDIR?=./build
-PROJS?=grs info blog os doc ci
+PROJS?=grs info blog os doc ci talk
 copyfiles =  index.ls mimes.json
 main:  copy
 	for f in $(PROJS); do  BUILDDIR=$(BUILDDIR)/"$${f}" make -C  "$${f}" ; done

blog/views/default/layout.ls

@@ -21,6 +21,10 @@
         <link rel="stylesheet" type="text/css" href="<?=HTTP_ROOT?>/rst/font-awesome.css" />
         <link rel="stylesheet" type="text/css" href="<?=HTTP_ROOT?>/rst/afx.css" />
         <link rel="stylesheet" type="text/css" href="<?=HTTP_ROOT?>/assets/style.css" />
+
+        <link rel="stylesheet" type="text/css" href="https://chat.iohub.dev/assets/quicktalk.css" />
+        <script src="https://chat.iohub.dev/assets/quicktalk.js"> </script>
+
         <script src="<?=HTTP_ROOT?>/rst/afx.js"> </script>
         <script src="<?=HTTP_ROOT?>/rst/gscripts/jquery-3.2.1.min.js"> </script>
         <script src="<?=HTTP_ROOT?>/assets/main.js"></script>
@@ -54,6 +58,15 @@
                   hljs.highlightBlock(block);
                   hljs.lineNumbersBlock(block);
                 });
+                // comment
+                
+                var options = {
+                    target: "quick_talk_comment_thread",
+                    api_uri: "https://chat.iohub.dev/comment",
+                    uri: "<?=url?>",
+                    page: $("#desktop")[0]
+                };
+                new QuickTalk(options);
               });
 <?lua end ?>
             window.twttr = (function(d, s, id) {

blog/views/default/post/detail.ls

@@ -52,44 +52,10 @@
             end
             echo("</ul>")
         end?>
-        <h1 class = "commentsec"></h1>
+        <h1 class = "commentsec">Comments</h1>
-        <div id="disqus_thread"></div>
+        <div>
-        <script>
+        The comment editor supports <b>Markdown</b> document format. Your email is necessary to notify you of further updates on the discussion. It will be hidden from the public.
-
-            /**
-            *  RECOMMENDED CONFIGURATION VARIABLES: EDIT AND UNCOMMENT THE SECTION BELOW TO INSERT DYNAMIC VALUES FROM YOUR PLATFORM OR CMS.
-            *  LEARN WHY DEFINING THESE VARIABLES IS IMPORTANT: https://disqus.com/admin/universalcode/#configuration-variables*/
-            
-            var disqus_config = function () {
-                this.page.url = "<?=url?>";  // Replace PAGE_URL with your page's canonical URL variable
-                this.page.identifier = "<?=std.md5(url)?>"; // Replace PAGE_IDENTIFIER with your 
-            };
-        
-            (function() { // DON'T EDIT BELOW THIS LINE
-            var d = document, s = d.createElement('script');
-            s.src = 'https://https-blog-lxsang-me.disqus.com/embed.js';
-            s.setAttribute('data-timestamp', +new Date());
-            (d.head || d.body).appendChild(s);
-            })();
-        </script>
-        <noscript>Please enable JavaScript to view the <a href="https://disqus.com/?ref_noscript">comments powered by Disqus.</a></noscript>
-
-        <!--div class = "commentform">
-            <div  class = "inputbox">
-                <div class = "label">Name:</div>
-                <input data-class = "data" type = "text" name = "name" />
         </div>
-            
+        <div id="quick_talk_comment_thread"></div>
-            <div  class = "inputbox">
-                <div  class = "label">Email:</div>
-                <input data-class = "data" type = "text" name = "email" />
-            </div>
-            
-            <textarea data-class = "data"  name = "content"></textarea>
-            <div class = "inputboxbt">
-                <div data-id="status"></div>
-                <button data-id = "send" >Comment</button>
-            </div>
-        </div-->
     </div>
 </div>

silk/BaseModel.lua

@@ -1,40 +1,31 @@
-
 -- create class
 BaseObject:subclass("BaseModel", {registry = {}})
 
 function BaseModel:initialize()
     self.db = self.registry.db
-    if self.db and self.name and self.name ~= "" and self.fields and not self.db:available(self.name) then
+    if self.db and self.name and self.name ~= "" and self.fields and
+        not self.db:available(self.name) then
         self.db:createTable(self.name, self.fields)
     end
 end
 
 function BaseModel:create(m)
-    if self.db and m then
+    if self.db and m then return self.db:insert(self.name, m) end
-        return self.db:insert(self.name,m)
-    end
     return false
 end
 
 function BaseModel:update(m)
-    if self.db and m then
+    if self.db and m then return self.db:update(self.name, m) end
-        return self.db:update(self.name,m)
-    end
     return false
 end
 
 function BaseModel:delete(cond)
-    if self.db and cond then
+    if self.db and cond then return self.db:delete(self.name, cond) end
-        return self.db:delete(self.name,cond)
-    end
     return false
 end
 
-
 function BaseModel:find(cond)
-    if self.db and cond then
+    if self.db and cond then return self.db:find(self.name, cond) end
-        return self.db:find(self.name, cond)
-    end
     return false
 end
 
@@ -45,8 +36,16 @@ function BaseModel:get(id)
 end
 
 function BaseModel:findAll()
-    if self.db then
+    if self.db then return self.db:getAll(self.name) end
-        return self.db:getAll(self.name)
-    end
     return false
 end
+
+function BaseModel:query(sql)
+    if self.db then return self.db:query(sql) end
+    return false
+end
+
+function BaseModel:select(sel, sql_cnd)
+    if self.db then return self.db:select(self.name, sel, sql_cnd) end
+    return nil
+end

silk/DBHelper.lua

@@ -8,9 +8,7 @@ function DBHelper:createTable(tbl, m)
     if self:available(tbl) then return true end
     local sql = "CREATE TABLE " .. tbl .. "(id INTEGER PRIMARY KEY"
     for k, v in pairs(m) do
-		if k ~= "id" then
+        if k ~= "id" then sql = sql .. "," .. k .. " " .. v end
-			sql = sql..","..k.." "..v
-		end
     end
     sql = sql .. ");"
     return sqlite.query(self.db, sql) == 1
@@ -30,7 +28,8 @@ function DBHelper:insert(tbl, m)
             end
         end
     end
-	local sql = "INSERT INTO "..tbl.." ("..table.concat(keys,',')..') VALUES ('
+    local sql = "INSERT INTO " .. tbl .. " (" .. table.concat(keys, ',') ..
+                    ') VALUES ('
     sql = sql .. table.concat(values, ',') .. ');'
     return sqlite.query(self.db, sql) == 1
 end
@@ -51,9 +50,7 @@ end
 function DBHelper:find(tbl, cond)
     local cnd = "1=1"
     local sel = "*"
-	if cond.exp then
+    if cond.exp then cnd = self:gencond(cond.exp) end
-		cnd = self:gencond(cond.exp)
-	end
     if cond.order then
         cnd = cnd .. " ORDER BY "
         local l = {}
@@ -64,9 +61,7 @@ function DBHelper:find(tbl, cond)
         end
         cnd = cnd .. table.concat(l, ",")
     end
-	if cond.limit then
+    if cond.limit then cnd = cnd .. " LIMIT " .. cond.limit end
-		cnd = cnd.." LIMIT "..cond.limit
-	end
     if cond.fields then
         sel = table.concat(cond.fields, ",")
         -- print(sel)
@@ -79,10 +74,17 @@ function DBHelper:find(tbl, cond)
     return data, a
 end
 
-function DBHelper:query(sql)
+function DBHelper:select(tbl, sel, cnd)
-	return sqlite.query(self.db, sql) == 1
+    local data = sqlite.select(self.db, tbl, sel, cnd)
+    if data == nil then return nil end
+    local a = {}
+    for n in pairs(data) do table.insert(a, n) end
+    table.sort(a)
+    return data, a
 end
 
+function DBHelper:query(sql) return sqlite.query(self.db, sql) == 1 end
+
 function DBHelper:update(tbl, m)
     local id = m['id']
     if id ~= nil then
@@ -94,15 +96,14 @@ function DBHelper:update(tbl, m)
                 table.insert(lst, k .. "=\"" .. v:gsub('"', '""') .. "\"")
             end
         end
-		local sql = "UPDATE "..tbl.." SET "..table.concat(lst,",").." WHERE id="..id..";"
+        local sql = "UPDATE " .. tbl .. " SET " .. table.concat(lst, ",") ..
+                        " WHERE id=" .. id .. ";"
         return sqlite.query(self.db, sql) == 1
     end
     return false
 end
 
-function DBHelper:available(tbl)
+function DBHelper:available(tbl) return sqlite.hasTable(self.db, tbl) == 1 end
-	return sqlite.hasTable(self.db, tbl) == 1
-end
 function DBHelper:deleteByID(tbl, id)
     local sql = "DELETE FROM " .. tbl .. " WHERE id=" .. id .. ";"
     return sqlite.query(self.db, sql) == 1
@@ -121,7 +122,9 @@ function DBHelper:gencond(o)
             for k1, v1 in pairs(v) do
                 local t = type(v1)
                 if (t == "string") then
-					return " ("..k1.." "..k..' "'..v1:gsub('"','""')..'") '
+                    return
+                        " (" .. k1 .. " " .. k .. ' "' .. v1:gsub('"', '""') ..
+                            '") '
                 end
                 return " (" .. k1 .. " " .. k .. " " .. v1 .. ") "
             end
@@ -133,17 +136,9 @@ function DBHelper:delete(tbl, cond)
     return sqlite.query(self.db, sql) == 1
 end
 
-function DBHelper:lastInsertID()
+function DBHelper:lastInsertID() return sqlite.lastInsertID(self.db) end
-	return sqlite.lastInsertID(self.db)
-end
 
-function DBHelper:close()
+function DBHelper:close() if self.db then sqlite.dbclose(self.db) end end
-	if self.db then
-		sqlite.dbclose(self.db)
-	end
-end
 function DBHelper:open()
-	if self.db ~= nil then
+    if self.db ~= nil then self.db = sqlite.getdb(self.db) end
-		self.db = sqlite.getdb(self.db)
-	end
 end

talk/Makefile

@@ -0,0 +1,6 @@
+copyfiles = router.lua models controllers assets
+
+main:
+	- mkdir -p $(BUILDDIR)
+	cp -rvf $(copyfiles) $(BUILDDIR)
+	- mkdir -p $(BUILDDIR)/log

talk/assets/quicktalk.css

@@ -0,0 +1,122 @@
+.quick-talk-compose {
+    display: block;
+    border: 1px solid #e5e5e5;
+    padding: 10px;
+}
+
+.quick-talk-compose input {
+    display: block;
+    width: 100%;
+    border: 0;
+    outline: 0;
+    font-style: italic;
+    border-bottom: 1px solid #e5e5e5;
+    font-size: 13px;
+    color: #878887;
+}
+
+.quick-talk-compose textarea {
+    display: block;
+    width: 100%;
+    min-height: 100px;
+    border: 0;
+    padding: 0;
+    outline: none;
+    margin: 0;
+    margin-top: 10px;
+    margin-bottom: 10px;
+    font-size: 13px;
+    color: #2c2c2c;
+}
+
+.quick-talk-compose .quick-talk-preview {
+    margin-top: 10px;
+    margin-bottom: 10px;
+}
+.quick-talk-compose .quick-talk-compose-footer {
+    display: flex;
+    flex-direction: row;
+}
+
+.quick-talk-compose .quick-talk-compose-footer div {
+    display: block;
+    flex: 1;
+    color: orangered;
+    font-style: italic;
+}
+
+.quick-talk-compose .quick-talk-compose-footer button,
+.quick-talk-compose-button {
+    color: white;
+    background-color: steelblue;
+    padding: 5px;
+    font-weight: bold;
+    border: 1px solid #e5e5e5;
+    outline: 0;
+    border-radius: 5px;
+    margin-left: 3px;
+}
+
+.quick-talk-compose-button {
+    margin-bottom: 10px;
+    margin-top: 10px;
+}
+.quick-talk-comment-thread {
+    display: block;
+}
+.quick-talk-comment-thread .quick-talk-comment {
+    margin-top: 10px;
+}
+
+.quick-talk-comment-thread .quick-talk-sub-comment {
+    margin-top: 10px;
+    margin-left: 20px;
+}
+
+.quick-talk-comment-thread .quick-talk-comment-header {
+    border-top: 1px solid #e5e5e5;
+    display: flex;
+    padding-top: 10px;
+    width: 100%;
+    flex-direction: row;
+}
+.quick-talk-comment-thread .quick-talk-comment-footer {
+    display: block;
+    margin: 0;
+    margin-left: 20px;
+    margin-bottom: 10px;
+    padding: 0;
+}
+.quick-talk-comment-thread .quick-talk-comment-footer span {
+    display: block;
+    color: steelblue;
+    cursor: pointer;
+    /* text-align: right; */
+    width: 100%;
+}
+.quick-talk-comment-thread .quick-talk-comment-footer span:hover {
+    text-decoration: underline;
+}
+.quick-talk-comment-thread .quick-talk-comment-user {
+    font-weight: bold;
+    color: steelblue;
+    padding-left: 3px;
+    padding-right: 3px;
+    padding-top: 1px;
+    padding-bottom: 1px;
+    border-radius: 5px;
+    background-color: #e1ecf4;
+}
+
+.quick-talk-comment-thread .quick-talk-comment-time {
+    font-style: italic;
+    color: steelblue;
+    margin-left: 5px;
+    padding-top: 1px;
+    font-size: 13px;
+}
+.quick-talk-comment-thread .quick-talk-comment-content {
+    display: block;
+    margin-left: 20px;
+    color: #2c2c2c;
+}

talk/assets/quicktalk.js

@@ -0,0 +1,248 @@
+class QuickTalk {
+    constructor(opt) {
+        this.options = opt;
+        if (typeof this.options.target === "string") {
+            this.options.target = document.getElementById(this.options.target);
+        }
+        this.preview_on = false;
+        this.instant_compose = undefined;
+        let editor = document.createElement("div");
+        let compose_button = document.createElement("button");
+        compose_button.setAttribute("class", "quick-talk-compose-button");
+        compose_button.textContent = "Write a comment";
+        this.options.target.appendChild(compose_button);
+        this.options.target.appendChild(editor);
+        let container = this.load_thread(this.options.target);
+        compose_button.addEventListener("click", (event) => {
+            if (this.instant_compose) {
+                this.instant_compose.parentNode.removeChild(this.instant_compose);
+            }
+            this.instant_compose = this.compose(editor, 0, true, (data) => {
+                this.show_comment(container, data, true).scrollIntoView();
+            });
+        });
+    }
+    request(uri, data, callback) {
+        let xhttp = new XMLHttpRequest();
+        xhttp.open("POST", uri, true);
+        xhttp.setRequestHeader("Content-type", "application/json");
+        xhttp.onreadystatechange = () => {
+            if (xhttp.readyState == 4) {
+                if (xhttp.status == 200) {
+                    if (callback) {
+                        callback(JSON.parse(xhttp.responseText));
+                    }
+                }
+                else {
+                    this.error(xhttp.statusText);
+                }
+            }
+        };
+        if (data) {
+            xhttp.send(JSON.stringify(data));
+        }
+        else {
+            xhttp.send();
+        }
+    }
+    set_status(type, msg) {
+        if (this.status_el) {
+            this.status_el.innerHTML = type + ": " + msg;
+        }
+        else {
+            console.log(type + ": " + msg);
+        }
+    }
+    clear_status() {
+        this.status_el.innerHTML = "";
+    }
+    info(msg) {
+        this.set_status("INFO", msg);
+    }
+    error(obj) {
+        console.log(obj);
+        this.set_status("ERROR", obj.toString());
+    }
+    compose(at, cid, auto_hide, callback) {
+        let preview = document.createElement("div");
+        preview.setAttribute("class", "quick-talk-preview");
+        preview.style.display = "none";
+        let container = document.createElement("div");
+        container.setAttribute("class", "quick-talk-compose");
+        let name = document.createElement("input");
+        name.value = "Name";
+        name.addEventListener("focus", (event) => {
+            if (name.value == "Name") {
+                name.value = "";
+            }
+        });
+        name.addEventListener("blur", (event) => {
+            if (name.value.trim() == "") {
+                name.value = "Name";
+            }
+        });
+        let email = document.createElement("input");
+        email.value = "Email";
+        email.addEventListener("focus", (event) => {
+            if (email.value == "Email") {
+                email.value = "";
+            }
+        });
+        email.addEventListener("blur", (event) => {
+            if (email.value.trim() == "") {
+                email.value = "Email";
+            }
+        });
+        let ta = document.createElement("textarea");
+        let footer = document.createElement("div");
+        footer.setAttribute("class", "quick-talk-compose-footer");
+        this.status_el = document.createElement("div");
+        let bt_preview = document.createElement("button");
+        bt_preview.textContent = "Preview";
+        bt_preview.addEventListener("click", (event) => {
+            let md = { data: ta.value };
+            if (!this.preview_on && ta.value.trim() != "") {
+                this.request(this.options.api_uri + "/preview", md, (ret) => {
+                    if (ret.result) {
+                        ta.style.display = "none";
+                        preview.innerHTML = ret.result;
+                        preview.style.display = "block";
+                        bt_preview.textContent = "Edit";
+                        this.preview_on = !this.preview_on;
+                    }
+                    else {
+                        this.error(ret.error);
+                    }
+                });
+            }
+            else {
+                ta.style.display = "block";
+                preview.style.display = "none";
+                bt_preview.textContent = "Preview";
+                this.preview_on = !this.preview_on;
+            }
+        });
+        let bt_submit = document.createElement("button");
+        bt_submit.textContent = "Send";
+        bt_submit.addEventListener("click", (event) => {
+            this.clear_status();
+            if (name.value.trim() == "" ||
+                name.value.trim() == "Name" ||
+                email.value.trim() == "" ||
+                email.value.trim() == "Email" ||
+                ta.value.trim() == "") {
+                this.info("Please enter all the fields");
+                return;
+            }
+            // check for email
+            let re = /^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
+            if (!re.test(String(email.value).toLowerCase()))
+                return this.info("Email is not correct");
+            // send the post request
+            let data = {
+                page: {
+                    uri: this.options.uri,
+                },
+                comment: {
+                    name: name.value,
+                    email: email.value,
+                    rid: cid,
+                    content: ta.value,
+                },
+            };
+            this.request(this.options.api_uri + "/post", data, (ret) => {
+                if (ret.result) {
+                    // TODO: more check goes here
+                    name.value = "Name";
+                    email.value = "Email";
+                    ta.value = "";
+                    if (auto_hide) {
+                        at.removeChild(container);
+                        this.instant_compose = undefined;
+                    }
+                    if (callback) {
+                        callback(ret.result);
+                    }
+                }
+                else {
+                    this.error(ret.error);
+                }
+            });
+        });
+        footer.appendChild(this.status_el);
+        footer.appendChild(bt_preview);
+        footer.appendChild(bt_submit);
+        container.appendChild(name);
+        container.appendChild(email);
+        container.appendChild(ta);
+        container.appendChild(preview);
+        container.appendChild(footer);
+        at.appendChild(container);
+        container.scrollIntoView();
+        return container;
+    }
+    load_thread(at) {
+        let container = document.createElement("div");
+        container.setAttribute("class", "quick-talk-comment-thread");
+        at.appendChild(container);
+        this.request(this.options.api_uri, { page: this.options.uri }, (ret) => {
+            if (ret.result) {
+                ret.result.forEach((comment) => {
+                    this.show_comment(container, comment, true);
+                });
+            }
+            else {
+                this.error(ret.error);
+            }
+        });
+        return container;
+    }
+    show_comment(at, comment, show_footer) {
+        let container = document.createElement("div");
+        container.setAttribute("class", "quick-talk-comment");
+        let header = document.createElement("div");
+        header.setAttribute("class", "quick-talk-comment-header");
+        let username = document.createElement("span");
+        username.setAttribute("class", "quick-talk-comment-user");
+        let time = document.createElement("span");
+        time.setAttribute("class", "quick-talk-comment-time");
+        let content = document.createElement("div");
+        content.setAttribute("class", "quick-talk-comment-content");
+        username.innerHTML = comment.name;
+        let date = new Date(parseInt(comment.time) * 1000);
+        time.innerHTML = `on ${date.getDate()}/${date.getMonth()}/${date.getFullYear()} ${date.getHours()}:${date.getMinutes()}:${date.getSeconds()}, wrote:`;
+        content.innerHTML = comment.content;
+        header.appendChild(username);
+        header.appendChild(time);
+        container.appendChild(header);
+        container.appendChild(content);
+        let sub_comments = document.createElement("div");
+        sub_comments.setAttribute("class", "quick-talk-sub-comment");
+        if (comment.children && comment.children.length > 0) {
+            comment.children.forEach((cmt) => {
+                this.show_comment(sub_comments, cmt, false);
+            });
+        }
+        container.appendChild(sub_comments);
+        if (show_footer) {
+            let footer = document.createElement("div");
+            footer.setAttribute("class", "quick-talk-comment-footer");
+            let span = document.createElement("span");
+            span.innerText = "Reply";
+            footer.appendChild(span);
+            let editor = document.createElement("div");
+            footer.appendChild(editor);
+            span.addEventListener("click", (event) => {
+                if (this.instant_compose) {
+                    this.instant_compose.parentNode.removeChild(this.instant_compose);
+                }
+                this.instant_compose = this.compose(editor, parseInt(comment.id), true, (data) => {
+                    this.show_comment(sub_comments, data, false);
+                });
+            });
+            container.appendChild(footer);
+        }
+        at.appendChild(container);
+        return container;
+    }
+}

talk/controllers/CommentController.lua

@@ -0,0 +1,146 @@
+BaseController:subclass("CommentController",
+                        {registry = {}, models = {"comment", "pages"}})
+
+local function process_md(input)
+    local md = require("md")
+    local content = ""
+    local callback = function(s) content = content .. s end
+    md.to_html(input, callback)
+    return content
+end
+
+local function sendmail(to, subject, content)
+    local from = "From: contact@iohub.dev\n"
+    local suject = "Subject: " .. subject .. "\n"
+
+    local cmd = 'echo "' .. utils.escape(from .. suject .. content) ..
+                    '"| sendmail ' .. to
+    local r = os.execute(cmd)
+
+    if r then return true end
+    return false
+end
+function CommentController:index(...)
+    if (REQUEST.method == "OPTIONS") then
+        result("")
+        return false
+    end
+    local rq = (JSON.decodeString(REQUEST.json))
+    if (rq) then
+        local pages, order = self.pages:find({exp = {["="] = {uri = rq.page}}})
+        if not pages or #order == 0 then
+            fail("Be the first to comment")
+        else
+            local pid = pages[1].id
+            local comments, order = self.comment:find(
+                                        {
+                    exp = {
+                        ["and"] = {{["="] = {pid = pid}}, {[" = "] = {rid = 0}}}
+                    },
+                    order = {time = "ASC"},
+                    fields = {"id", "time", "name", "rid", "pid", "content"}
+                })
+            if not comments or #order == 0 then
+                fail("Be the first to comment")
+            else
+                for idx, v in pairs(order) do
+                    local data = comments[v]
+                    data.content = process_md(data.content)
+                    data.children = {}
+                    -- find all the replies to this thread
+                    local sub_comments, suborder =
+                        self.comment:find(
+                            {
+                                exp = {
+                                    ["and"] = {
+                                        {["="] = {pid = pid}},
+                                        {[" = "] = {rid = data.id}}
+                                    }
+                                },
+                                order = {time = "ASC"}
+
+                            })
+                    if sub_comments and #suborder ~= 0 then
+                        for i, subc in pairs(suborder) do
+                            sub_comments[subc].content =
+                                process_md(sub_comments[subc].content)
+                        end
+                        data.children = sub_comments
+                    end
+                end
+                result(comments)
+            end
+        end
+    else
+        fail("Invalid request")
+    end
+    return false
+end
+
+function CommentController:post(...)
+    if (REQUEST.method == "OPTIONS") then
+        result("")
+        return false
+    end
+    local rq = (JSON.decodeString(REQUEST.json))
+    if rq then
+        local pages, order = self.pages:find({exp = {["="] = rq.page}})
+        if not pages or #order == 0 then
+            -- insert data
+            if self.pages:create(rq.page) then
+                rq.comment.pid = self.pages.db:lastInsertID()
+            else
+                fail("Unable to initialize comment thread for page: " ..
+                         rq.page.uri)
+                return false
+            end
+        else
+            rq.comment.pid = pages[1].id
+        end
+        -- now insert the comment
+        rq.comment.time = os.time(os.date("!*t"))
+        if (self.comment:create(rq.comment)) then
+            rq.comment.id = self.comment.db:lastInsertID()
+
+            rq.comment.content = process_md(rq.comment.content)
+
+            -- send mail to all users of current page
+            local cmts, cmti = self.comment:select("MIN(id) as id,email",
+                                                   "pid=" .. rq.comment.pid ..
+                                                       " AND email != '" ..
+                                                       rq.comment.email ..
+                                                       "' GROUP BY email")
+            if cmts and #cmti > 0 then
+                for idx, v in pairs(cmti) do
+                    sendmail(cmts[v].email, rq.comment.name ..
+                                 " has written something on a page that you've commented on",
+                             rq.comment.name ..
+                                 " has written something on a page that you've commented. \nPlease visit this page: " ..
+                                 rq.page.uri ..
+                                 " for updates on the discussion.\nBest regard,\nEmail automatically sent by QuickTalk API")
+                end
+            end
+            rq.comment.email = ""
+            result(rq.comment)
+        else
+            fail("Unable to save comment")
+        end
+    else
+        fail("Invalid request")
+    end
+    return false
+end
+
+function CommentController:preview(...)
+    if (REQUEST.method == "OPTIONS") then
+        result("")
+        return false
+    end
+    local rq = (JSON.decodeString(REQUEST.json))
+    if (rq and rq.data) then
+        result(process_md(rq.data))
+    else
+        fail("Invalid request")
+    end
+    return false
+end

talk/controllers/IndexController.lua

@@ -0,0 +1,6 @@
+BaseController:subclass("IndexController", {registry = {}})
+
+function IndexController:index(...)
+    result("Quicktalk API")
+    return false
+end

talk/models/CommentModel.lua

@@ -0,0 +1,12 @@
+BaseModel:subclass("CommentModel", {
+    registry = {},
+    name = "comments",
+    fields = {
+        pid = "INTEGER",
+        name = "TEXT",
+        email = "TEXT",
+        content = "TEXT",
+        time = "NUMERIC",
+        rid = "INTEGER DEFAULT 0"
+    }
+})

talk/models/PagesModel.lua

@@ -0,0 +1,2 @@
+BaseModel:subclass("PagesModel",
+                   {registry = {}, name = "pages", fields = {uri = "TEXT"}})

talk/router.lua

@@ -0,0 +1,56 @@
+-- the rewrite rule for the framework
+-- should be something like this
+-- ^\/apps\/+(.*)$ = /apps/router.lua?r=<1>&<query>
+-- some global variables
+function fail(msg)
+    std.json()
+    std.t(JSON.encode({error = msg}))
+end
+
+function result(obj)
+    std.json()
+    std.t(JSON.encode({result = obj, error = false}))
+end
+DIR_SEP = "/"
+WWW_ROOT = __ROOT__ .. "/talk"
+if HEADER.Host then
+    HTTP_ROOT = "https://" .. HEADER.Host
+else
+    HTTP_ROOT = "https://talk.iohub.dev"
+end
+-- class path: path.to.class
+BASE_FRW = ""
+-- class path: path.to.class
+CONTROLLER_ROOT = BASE_FRW .. "talk.controllers"
+MODEL_ROOT = BASE_FRW .. "talk.models"
+-- file path: path/to/file
+VIEW_ROOT = WWW_ROOT .. DIR_SEP .. "views"
+LOG_ROOT = WWW_ROOT .. DIR_SEP .. "logs"
+
+-- require needed library
+require(BASE_FRW .. "silk.api")
+
+-- registry object store global variables
+local REGISTRY = {}
+-- set logging level
+REGISTRY.logger = Logger:new{
+    levels = {INFO = false, ERROR = false, DEBUG = false}
+}
+
+REGISTRY.layout = 'default'
+REGISTRY.fileaccess = true
+REGISTRY.db = DBHelper:new{db = "quicktalk"}
+REGISTRY.db:open()
+
+local router = Router:new{registry = REGISTRY}
+REGISTRY.router = router
+router:setPath(CONTROLLER_ROOT)
+-- router:route('edit', 'post/edit', "ALL" )
+
+std.header("Access-Control-Allow-Origin", "*")
+std.header("Access-Control-Allow-Methods", "POST")
+std.header("Access-Control-Allow-Headers", "content-type")
+
+-- router:route('default', nil)
+router:delegate()
+if REGISTRY.db then REGISTRY.db:close() end