Add crate for common types and code

+# This is from the webpage:
+# https://www.developer.com/languages/creating-an-api-with-rust-and-sqlite/
+# I have fixed some things manually as the code on that page did not compile
+# without.
+
+# Additional informations at https://actix.rs/docs/databases/ assume one
+# should use web::block to access the database...
+# TODO check what is the difference to this approach.
+#  - well, we use web::block already for write actions.
+
+# Introduction to rust async:
+# https://gruberbastian.com/posts/rust_async/
+# https://blog.logrocket.com/a-practical-guide-to-async-in-rust/
+# https://os.phil-opp.com/async-await/
+
+# Simple explanation on technical terms synchronous, asynchronous, concurrent
+# and parallel.
+# https://medium.com/plain-and-simple/synchronous-vs-asynchronous-vs-concurrent-vs-parallel-4342bfb8b9f2
+
+[package]
+name = "artshop-common"
+version = "0.1.0"
+workspace = ".."
+edition = "2018"
+
+[dependencies]
+serde = "^1.0"

+pub mod types;

+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Clone, Deserialize, Serialize)]
+pub enum Either<L, R> {
+    Left(L),
+    Reight(R)
+}
+
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct MarkdownJson {
+    pub name: String,
+    pub content: String,
+    pub number_of_versions: i32,
+    pub date_created: String,
+    pub date_updated: String,
+}

@@ -27,6 +27,7 @@ edition = "2018"
 actix-files = "0.2"
 actix-files = "0.2"
 actix-web = "2.0"
 actix-web = "2.0"
 actix-rt = "1.1.1"
 actix-rt = "1.1.1"
+artshop-common = { path = "../common" }
 diesel = { version = "1.4.7", features = ["sqlite", "r2d2"]}
 diesel = { version = "1.4.7", features = ["sqlite", "r2d2"]}
 r2d2 = "0.8.9"
 r2d2 = "0.8.9"
 dotenv = "0.15.0"
 dotenv = "0.15.0"

@@ -2,6 +2,7 @@ use std::sync::Arc;
 use crate::schema::*;
 use crate::schema::*;
 use crate::error::Error;
 use crate::error::Error;
 use crate::Pool;
 use crate::Pool;
+use artshop_common::types::MarkdownJson;
 use diesel::prelude::*;
 use diesel::prelude::*;
 use diesel::{
 use diesel::{
     dsl::{delete, insert_into, update},
     dsl::{delete, insert_into, update},
@@ -14,7 +15,7 @@ use flate2::Compression;
 use flate2::write::{DeflateEncoder, DeflateDecoder};
 use flate2::write::{DeflateEncoder, DeflateDecoder};
 
 
 
 
-#[derive(Debug, Serialize, Deserialize, Queryable, Identifiable)]
+#[derive(Debug, Clone, Serialize, Deserialize, Queryable, Identifiable)]
 pub struct Markdown {
 pub struct Markdown {
     pub id: i32,
     pub id: i32,
     pub name: String,
     pub name: String,
@@ -55,12 +56,23 @@ pub struct MarkdownDiffNew<'a> {
 
 
 #[derive(Debug, Serialize, Deserialize, AsChangeset)]
 #[derive(Debug, Serialize, Deserialize, AsChangeset)]
 #[table_name="markdowns"]
 #[table_name="markdowns"]
-pub struct MarkdownJson {
-    pub name: String,
-    pub content: String,
+struct MarkdownChange<'a> {
+    pub name: &'a str,
+    pub content: &'a str,
     pub number_of_versions: i32,
     pub number_of_versions: i32,
-    pub date_created: String,
-    pub date_updated: String,
+    pub date_created: &'a str,
+    pub date_updated: &'a str,
+}
+
+impl<'a> From<&'a MarkdownJson> for MarkdownChange<'a> {
+    fn from(md: &'a MarkdownJson) -> Self {
+        Self { name: md.name.as_str()
+             , content: md.content.as_str()
+             , number_of_versions: md.number_of_versions
+             , date_created: md.date_created.as_str()
+             , date_updated: md.date_updated.as_str()
+        }
+    }
 }
 }
 
 
 pub(crate) enum Action {
 pub(crate) enum Action {
@@ -108,7 +120,7 @@ pub(crate) fn get_markdowns(pool: Arc<Pool>) -> Result<Vec<Markdown>, Error>
 
 
 pub(crate) fn get_markdown( pool:  Arc<Pool>
 pub(crate) fn get_markdown( pool:  Arc<Pool>
                           , ident: &str
                           , ident: &str
-                          , patch: Option<i32> ) -> Result<Markdown, Error>
+                          , patch: Option<i32> ) -> Result<Vec<Markdown>, Error>
 {
 {
     use crate::schema::markdowns::dsl::*;
     use crate::schema::markdowns::dsl::*;
     use crate::schema::markdown_diffs::dsl::*;
     use crate::schema::markdown_diffs::dsl::*;
@@ -118,6 +130,8 @@ pub(crate) fn get_markdown( pool:  Arc<Pool>
                      . filter(name.eq(ident))
                      . filter(name.eq(ident))
                      . first::<Markdown>(&db_connection)?;
                      . first::<Markdown>(&db_connection)?;
 
 
+    let mut mds = vec![markdown.clone()];
+
     if let Some(patch) = patch {
     if let Some(patch) = patch {
         let result = markdown_diffs . filter(markdown_id.eq(markdown.id))
         let result = markdown_diffs . filter(markdown_id.eq(markdown.id))
             . filter(diff_id.ge(patch))
             . filter(diff_id.ge(patch))
@@ -130,11 +144,13 @@ pub(crate) fn get_markdown( pool:  Arc<Pool>
             let decomp = decoder.reset(Vec::new()).unwrap();
             let decomp = decoder.reset(Vec::new()).unwrap();
             let decomp = Patch::from_str(
             let decomp = Patch::from_str(
                 std::str::from_utf8(decomp.as_ref()).unwrap()).unwrap();
                 std::str::from_utf8(decomp.as_ref()).unwrap()).unwrap();
-            markdown.content = apply(&mut markdown.content, &decomp).unwrap();
+            markdown.content = apply(&markdown.content, &decomp).unwrap();
+            markdown.date_updated = patch.date_created;
+            mds.push(markdown.clone());
         }
         }
     };
     };
 
 
-    Ok(markdown)
+    Ok(mds)
 }
 }
 
 
 pub(crate) fn delete_markdown( pool: Arc<Pool>
 pub(crate) fn delete_markdown( pool: Arc<Pool>
@@ -185,7 +201,7 @@ pub(crate) fn update_markdown( pool: Arc<Pool>
         insert_into(markdown_diffs) . values(&new_markdown_diff)
         insert_into(markdown_diffs) . values(&new_markdown_diff)
                                     . execute(&db_connection)?;
                                     . execute(&db_connection)?;
 
 
-        update(&markdown).set(&item).execute(&db_connection)?;
+        update(&markdown).set(MarkdownChange::from(&item)).execute(&db_connection)?;
 
 
         Ok(())
         Ok(())
     }).unwrap();
     }).unwrap();

@@ -3,6 +3,7 @@ use crate::Pool;
 
 
 use actix_web::{Error, HttpResponse, web};
 use actix_web::{Error, HttpResponse, web};
 use anyhow::Result;
 use anyhow::Result;
+use artshop_common::types::MarkdownJson;
 use serde::Deserialize;
 use serde::Deserialize;
 
 
 #[derive(Debug, Deserialize)]
 #[derive(Debug, Deserialize)]
@@ -38,7 +39,7 @@ pub async fn get_markdown( pool: web::Data<Pool>
 
 
 pub async fn update_markdown( pool: web::Data<Pool>
 pub async fn update_markdown( pool: web::Data<Pool>
                             , name: web::Path<String>
                             , name: web::Path<String>
-                            , item: web::Json<markdown::MarkdownJson> )
+                            , item: web::Json<MarkdownJson> )
     -> Result<HttpResponse, Error>
     -> Result<HttpResponse, Error>
 {
 {
     let pool = pool.into_inner();
     let pool = pool.into_inner();

@@ -12,6 +12,7 @@ crate-type = ["cdylib", "rlib"]
 default = ["console_error_panic_hook"]
 default = ["console_error_panic_hook"]
 
 
 [dependencies]
 [dependencies]
+artshop-common = { path = "../common" }
 katex = { version = "0.4", default-features = false, features = ["wasm-js"] }
 katex = { version = "0.4", default-features = false, features = ["wasm-js"] }
 pulldown-cmark = "0.9"
 pulldown-cmark = "0.9"
 console_log = "^0.1"
 console_log = "^0.1"

 mod data;
 mod data;
 
 
+use artshop_common::types::MarkdownJson;
 use js_sys::JsString;
 use js_sys::JsString;
 use log::Level;
 use log::Level;
 use mogwai::prelude::*;
 use mogwai::prelude::*;
@@ -25,22 +26,13 @@ fn md_to_html(source: &str) -> String {
     html_output
     html_output
 }
 }
 
 
-#[derive(Clone, Debug, Serialize, Deserialize)]
-pub struct MarkdownJson {
-    pub name: String,
-    pub content: String,
-    pub number_of_versions: i32,
-    pub date_created: String,
-    pub date_updated: String,
-}
-
-async fn md_from_db() -> MarkdownJson {
+async fn md_from_db() -> Vec<MarkdownJson> {
     let window = web_sys::window().unwrap();
     let window = web_sys::window().unwrap();
     let mut opts = RequestInit::new();
     let mut opts = RequestInit::new();
     opts.method("GET").mode(RequestMode::Cors);
     opts.method("GET").mode(RequestMode::Cors);
 
 
     let request = Request::new_with_str_and_init(
     let request = Request::new_with_str_and_init(
-          "/api/v0/markdowns/md-example?patch=3"
+          "/api/v0/markdowns/md-example?patch=1" // patch=1 always gets all patches.
         , &opts ).unwrap();
         , &opts ).unwrap();
     request.headers().set("Accept", "application/json").unwrap();
     request.headers().set("Accept", "application/json").unwrap();
 
 
@@ -51,9 +43,9 @@ async fn md_from_db() -> MarkdownJson {
                            . await.unwrap()
                            . await.unwrap()
                            . dyn_into::<JsString>().unwrap()
                            . dyn_into::<JsString>().unwrap()
                            );
                            );
-    let data :MarkdownJson = serde_json::from_str(data.as_str()).unwrap();
+    let data :Vec<MarkdownJson> = serde_json::from_str(data.as_str()).unwrap();
 
 
-    data.clone()
+    data
 }
 }
 
 
 async fn md_to_db(md :MarkdownJson) {
 async fn md_to_db(md :MarkdownJson) {
@@ -80,7 +72,7 @@ async fn md_to_db(md :MarkdownJson) {
 async fn editor_logic( mut rx_logic: broadcast::Receiver<AppLogic>
 async fn editor_logic( mut rx_logic: broadcast::Receiver<AppLogic>
                      , tx_view: broadcast::Sender<String>
                      , tx_view: broadcast::Sender<String>
                      , mut rx_dom: broadcast::Receiver<Dom>
                      , mut rx_dom: broadcast::Receiver<Dom>
-                     , md :MarkdownJson ) {
+                     , md :Vec<MarkdownJson> ) {
     let dom = rx_dom.next().await.unwrap();
     let dom = rx_dom.next().await.unwrap();
     let mut show_edit = false;
     let mut show_edit = false;
 
 
@@ -98,11 +90,11 @@ async fn editor_logic( mut rx_logic: broadcast::Receiver<AppLogic>
     fn update(dom: &Dom) {
     fn update(dom: &Dom) {
         if let Either::Left(dom_js) = dom.inner_read() {
         if let Either::Left(dom_js) = dom.inner_read() {
             dom_js . to_owned()
             dom_js . to_owned()
-                . dyn_into::<Node>().unwrap()
-                . child_nodes().get(1).unwrap()
-                . child_nodes().get(1).unwrap()
-                . dyn_into::<HtmlElement>().unwrap()
-                . set_inner_html(md_to_html(get_md(dom).as_str()).as_str())
+                   . dyn_into::<Node>().unwrap()
+                   . child_nodes().get(1).unwrap()
+                   . child_nodes().get(1).unwrap()
+                   . dyn_into::<HtmlElement>().unwrap()
+                   . set_inner_html(md_to_html(get_md(dom).as_str()).as_str())
         };
         };
     }
     }
 
 
@@ -137,7 +129,7 @@ async fn editor_logic( mut rx_logic: broadcast::Receiver<AppLogic>
     while let Some(msg) = rx_logic.next().await {
     while let Some(msg) = rx_logic.next().await {
         match msg {
         match msg {
             AppLogic::Store => {
             AppLogic::Store => {
-                let mut new_md = md.clone();
+                let mut new_md = md[0].clone();
                 new_md.content = get_md(&dom);
                 new_md.content = get_md(&dom);
                 md_to_db(new_md).await;
                 md_to_db(new_md).await;
             },
             },
@@ -158,7 +150,7 @@ async fn editor_logic( mut rx_logic: broadcast::Receiver<AppLogic>
 fn editor_view( tx_logic: broadcast::Sender<AppLogic>
 fn editor_view( tx_logic: broadcast::Sender<AppLogic>
               , rx_view: broadcast::Receiver<String>
               , rx_view: broadcast::Receiver<String>
               , tx_dom: broadcast::Sender<Dom>
               , tx_dom: broadcast::Sender<Dom>
-              , md: &MarkdownJson
+              , md: &Vec<MarkdownJson>
 ) -> ViewBuilder<Dom> {
 ) -> ViewBuilder<Dom> {
     let ns = "http://www.w3.org/2000/svg";
     let ns = "http://www.w3.org/2000/svg";
 
 
@@ -190,22 +182,151 @@ fn editor_view( tx_logic: broadcast::Sender<AppLogic>
             <div contenteditable="true"
             <div contenteditable="true"
                  style:cursor="text"
                  style:cursor="text"
                  style:display=("none", rx_view)>
                  style:display=("none", rx_view)>
-                <pre on:click=store_filter>{md.content.clone()}</pre>
+                <pre on:click=store_filter>{md[0].content.clone()}</pre>
             </div>
             </div>
             <div>
             <div>
+                <div>
+                <button>
+                    <svg xmlns=ns viewBox="0 -1 24 24"
+                         style:width="1.5em" style:height="1.5em"
+                         style:fill="none">
+                        <path xmlns=ns
+                              style:fill="black"
+                              d="M9.17154 11.508
+                                 L7.75732 10.0938
+                                 L12 5.85113
+                                 L16.2426 10.0938
+                                 L14.8284 11.508
+                                 L12 8.67956
+                                 L9.17154 11.508Z"/>
+                        <path xmlns=ns
+                              style:fill="black"
+                              d="M9.17154 12.492
+                                 L7.75732 13.9062
+                                 L12 18.1489
+                                 L16.2426 13.9062
+                                 L14.8284 12.492
+                                 L12 15.3204
+                                 L9.17154 12.492Z"/>
+                        <path xmlns=ns
+                              style:fill="black"
+                              style:fill_rule="evenodd"
+                              style:clip_rule="evenodd"
+                              d="M1 5
+                                 C1 2.79086 2.79086 1 5 1
+                                 H19
+                                 C21.2091 1 23 2.79086 23 5
+                                 V19
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+                                 H5
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+                                 M5 3
+                                 H19
+                                 C20.1046 3 21 3.89543 21 5
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+                                 H5
+                                 C3.89543 21 3 20.1046 3 19
+                                 V5
+                                 C3 3.89543 3.89543 3 5 3Z"/>
+                    </svg>
+                </button>
+                <button>
+                    <svg xmlns=ns viewBox="0 -1 32 32"
+                         style:width="1.5em" style:height="1.5em"
+                         style:enable_background="new 0 0 32 32"
+                         style:fill="none"
+                         style:stroke="#000"
+                         style:stroke_width="2"
+                         style:stroke_linecap="round"
+                         style:stroke_linejoin="round"
+                         style:stroke_miterlimit="10">
+                        <ellipse xmlns=ns
+                                 cx="14" cy="8" rx="10" ry="5"/>
+                        <line xmlns=ns
+                              x1="24" y1="16" x2="24" y2="8"/>
+                        <path xmlns=ns
+                              d="M4,8 v8 c0,2.8,4.5,5,10,5
+                                  c1.2,0,2.3-0.1,3.4-0.3"/>
+                        <path xmlns=ns
+                              d="M4,16 v8 c0,2.8,4.5,5,10,5
+                                  c2,0,3.8-0.3,5.3-0.8"/>
+                        <circle xmlns=ns
+                                cx="24" cy="23" r="7"/>
+                        <line xmlns=ns
+                              x1="24" y1="16" x2="24" y2="26"/>
+                        <polyline xmlns=ns
+                                  points="21,23 24,26 27,23"/>
+                    </svg>
+                </button>
+                <button>
+                    <svg xmlns=ns viewBox="10.3 3.8 76.2 88.7"
+                         style:width="1.5em" style:height="1.5em">
+                        <g xmlns=ns id="_x37_0">
+                        <polygon xmlns=ns
+                                 points="35.4,18.1 31.1,4.3 31.1,16.3
+                                         24.5,16.3 24.5,10.9 18.3,18.9
+                                         13.8,23.7 17,23.7 19.8,31.8
+                                         27.9,34.1 27.9,37.8 38.7,41.8
+                                         38.7,34.1 38.7,30.4 38.7,25.2
+                                         46.8,25.2 "/>
+                        <path xmlns=ns
+                              d="M75.7,39.9 h-8.3 h-40.5 h-8.3 h-3 v9.5
+                                  v2 h4.7 c2.2,13.3,6.8,42.2,6.8,42.2 h40
+                                  c0,0,4.6-27.6,7-42.2 h4.7 v-2 v-9.5
+                                 H75.7z
+                                 M67.7,51.4 l-2.6,15.6 l-6.1-6.9 l8-8.7
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+                                 L31.4,69.6z
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+                                  l-5.8,6.4
+                                 H47.1z
+                                 M53.7,86.7 l2.9-3.2 l3,3.2
+                                 H53.7z"/>
+                        </g>
+                    </svg>
+                </button>
                 <button on:click=toggle_filter>
                 <button on:click=toggle_filter>
-                    <svg version="1.1" id="Capa_1" xmlns=ns
-                         x="0px" y="0px" viewBox="0 0 220.001 220.001"
+                    <svg xmlns=ns viewBox="0 0 220.001 220.001"
                          style:width="1.5em" style:height="1.5em">
                          style:width="1.5em" style:height="1.5em">
                         <g xmlns=ns>
                         <g xmlns=ns>
-                            <polygon xmlns=ns points="0,220 59.34,213.86 6.143,160.661"></polygon>
-                            <path xmlns=ns d="M132.018,34.787l53.197,53.197L69.568,203.631L16.37,
-                                     150.434L132.018,34.787z M212.696,60.502c9.738-9.738,9.742-25.527,
-                                     0-35.268l-17.93-17.93c-9.738-9.74-25.529-9.738-35.268,0l-17.346,
-                                     17.347l53.199,53.196L212.696,60.502z"></path>
+                            <polygon xmlns=ns
+                                     points="0,220 59.34,213.86 6.143,160.661"/>
+                            <path xmlns=ns
+                                  d="M132.018,34.787 l53.197,53.197
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+                                     L212.696,60.502z"/>
                         </g>
                         </g>
                     </svg>
                     </svg>
                 </button>
                 </button>
+                </div>
                 <div></div>
                 <div></div>
                 <div></div>
                 <div></div>
                 <div></div>
                 <div></div>