From 5a03734b6767fed04c0913384584d8f59dc597ea Mon Sep 17 00:00:00 2001
From: jelemux <jeremias.weber@protonmail.com>
Date: Tue, 24 Nov 2020 21:58:51 +0100
Subject: add traits for viewmodel and view

---
 src/view/main.rs | 335 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 335 insertions(+)
 create mode 100644 src/view/main.rs

(limited to 'src/view/main.rs')

diff --git a/src/view/main.rs b/src/view/main.rs
new file mode 100644
index 0000000..e1753b4
--- /dev/null
+++ b/src/view/main.rs
@@ -0,0 +1,335 @@
+use crate::view::telephone::TelephoneView;
+use std::collections::HashSet;
+use super::name::{NameView};
+use super::address::AddressView;
+use genpdf::Element as _;
+use genpdf::{elements, style, fonts};
+use qrcodegen::QrCode;
+use qrcodegen::QrCodeEcc;
+use yew::prelude::*;
+use vcard::{VCard, VCardError};
+use super::input_objects::utility::*;
+use super::input_objects::name::Name;
+use super::input_objects::address::Address;
+use super::input_objects::telephone::Telephone;
+use super::input_objects::VCardPropertyInputObject;
+
+
+pub struct MainView {
+    link: ComponentLink<Self>,
+    error: Vec<String>,
+    name: Name,
+    address: Address,
+    telephone: Telephone,
+    download: Option<Download>,
+    selected_option: DownloadOption,
+}
+
+pub enum Msg {
+    UpdateName(Name),
+    UpdateAddress(Address),
+    UpdateTelephone(Telephone),
+    Generate(DownloadOption),
+    Nope,
+}
+
+impl Component for MainView {
+    type Message = Msg;
+    type Properties = ();
+
+    fn create(_props: Self::Properties, link: ComponentLink<Self>) -> Self {
+        MainView { 
+            link, 
+            error: vec![], 
+            name: Name::new(), 
+            address: Address::new(),
+            telephone: Telephone::new(),
+            download: None, 
+            selected_option: DownloadOption::VCard 
+        }
+    }
+
+    fn update(&mut self, msg: Self::Message) -> ShouldRender {
+        self.error.clear();
+        match msg {
+            Msg::UpdateName(value) => {
+                self.name = value;
+                self.link.send_message(Msg::Generate(self.selected_option));
+            },
+            Msg::UpdateAddress(value) => {
+                self.address = value;
+                self.link.send_message(Msg::Generate(self.selected_option));
+            },
+            Msg::UpdateTelephone(value) => {
+                self.telephone = value;
+                self.link.send_message(Msg::Generate(self.selected_option));
+            },
+            Msg::Generate(option) => {
+                self.selected_option = option;
+
+                let vcard_content = match self.generate_vcard() {
+                    Ok(vcard) => Some(vcard.to_string()),
+                    Err(VCardError::FormatError(err)) => {
+                        self.error.push(err.to_string());
+                        None
+                    }
+                    Err(VCardError::EmptyFormatName) => {
+                        self.error.push(String::from("At least one of the name fields should be filled out."));
+                        None
+                    }
+                };
+
+                match option {
+                    DownloadOption::VCard => {
+                        if vcard_content.is_some() {
+                            self.download = Some(
+                                Download { 
+                                    file_name: format!("{}.vcs", self.name.formatted_name()), 
+                                    content: vcard_content.unwrap().to_string(), 
+                                    mime_type: MimeType::VCard,
+                                }
+                            )
+                        }
+                    }
+                    DownloadOption::QrCode => {
+                        if vcard_content.is_some() {
+                            match QrCode::encode_text(vcard_content.as_ref().unwrap(), QrCodeEcc::Low) {
+                                Ok(qr) => self.download = Some(
+                                    Download {
+                                        file_name: format!("QR-Code VCard {}.svg", self.name.formatted_name()),
+                                        content: qr.to_svg_string(4),
+                                        mime_type: MimeType::SVG,
+                                    }
+                                ),
+                                Err(_) => self.error.push(String::from("Sorry, VCard is too long!")),
+                            };
+                        }
+                    }
+                    DownloadOption::PDF => {
+                        match self.generate_pdf() {
+                            Ok(pdf) => self.download = Some(
+                                Download {
+                                    file_name: format!("Visitenkarten {}.pdf", self.name.formatted_name()),
+                                    content: pdf,
+                                    mime_type: MimeType::PDF,
+                                }
+                            ),
+                            Err(_) => self.error.push(String::from("Unexpected error while generating the PDF. Please contact me about it.")),
+                        }
+                    }
+                }
+            }
+            Msg::Nope => return false,
+        };
+        if self.error.len() > 0 {
+            self.download = None;
+        }
+        true
+    }
+
+    fn change(&mut self, _props: Self::Properties) -> ShouldRender {
+        false
+    }
+
+    fn view(&self) -> Html {
+
+        let download_options = self.link.callback(|e: ChangeData|
+            match e {
+                ChangeData::Select(v) => match v.value().as_str() {
+                    "vcard" => Msg::Generate(DownloadOption::VCard),
+                    "pdf" => Msg::Generate(DownloadOption::PDF),
+                    "qrcode" => Msg::Generate(DownloadOption::QrCode),
+                    _ => Msg::Nope,
+                },
+                _ => Msg::Nope,
+            }
+        );
+
+        html!{
+            <>
+                <main>
+                    <section class="hero">
+                        <div class="hero-body">
+                            <div class="container is-max-widescreen">
+                                <h1 class="title">{ "A Generator for vCards" }</h1>
+                                <h2 class="subtitle">{ "Supports generating vCards (.vcf), print-ready PDF business cards and QR Codes" }</h2>
+                            </div>
+                        </div>
+                    </section>
+
+                    <section class="section">
+                        <div class="container is-max-widescreen">
+
+                            { self.render_errors() }
+
+                            <NameView oninput=self.link.callback(|n: Name| Msg::UpdateName(n)) />
+
+                            <AddressView oninput=self.link.callback(|a: Address| Msg::UpdateAddress(a)) />
+
+                            <TelephoneView oninput=self.link.callback(|t: Telephone| Msg::UpdateTelephone(t)) />
+
+                            <div class="block level-left">
+                                <div class="select level-item">
+                                    <select id="download_options" onchange=download_options>
+                                        <option value="vcard">{ "VCard (.vcf)" }</option>
+                                        <option value="pdf">{ "Print-ready PDF" }</option>
+                                        <option value="qrcode">{ "QR Code" }</option>
+                                    </select>
+                                </div>
+                                
+                                { self.render_download() }
+                            </div>
+
+                            <div class="block">
+                                { self.render_preview() }
+                            </div>
+
+                        </div>
+                    </section>
+                </main>
+
+                <footer class="footer">
+                    <div class="content has-text-centered">
+                        <p>
+                            <strong>{ "VCard Generator" }</strong> { " by " } <a href="https://jelemux.dev">{ "Jeremias Weber" }</a>{ ". "}
+                            { "The source code is licenced " } <a href="http://opensource.org/licenses/mit-license.php">{ "MIT" }</a>{"."}
+                        </p>
+                    </div>
+                </footer>
+            </>
+        }
+    }
+}
+
+impl MainView {
+    fn render_errors(&self) -> Html {
+        html!{
+            <>
+                {
+                    for self.error.iter().map(|err| 
+                        html!{
+                            <div class="notification is-danger is-light">
+                                { err }
+                            </div>
+                        }
+                    ) 
+                }
+            </>
+        }
+    }
+    fn render_download(&self) -> Html {
+        if self.download.is_some() {
+            let download = self.download.as_ref().unwrap();
+
+            html!{
+                <a href=download.as_data_link() download=download.file_name class="button is-primary level-item" >
+                    { "Download" }
+                </a>
+            }
+        } else {
+            html!{}
+        }
+    }
+    fn render_preview(&self) -> Html {
+        if self.download.is_some() {
+            let download = self.download.as_ref().unwrap();
+
+            match download.mime_type {
+                MimeType::PDF => html!{
+                    <iframe src=download.as_data_link() alt="PDF Preview" width="400" height="550"/>
+                },
+                MimeType::VCard => {
+                    html!{
+                        <pre>
+                            <code> { download.content.clone() } </code>
+                        </pre>
+                    }
+                }
+                MimeType::SVG => html!{
+                    <img src=download.as_data_link() alt="Image Preview" class="image is-square" width="300" height="300"/>
+                },
+            }
+        } else {
+            html!{}
+        }
+    }
+    fn generate_vcard(&self) -> Result<VCard, VCardError> {
+        match VCard::from_formatted_name_str(&self.name.formatted_name()) {
+            Ok(vcard) => {
+                let mut vcard = vcard;
+
+                let names = {
+                    let mut names = HashSet::new();
+                    names.insert(self.name.to_vcard_property().unwrap());
+
+                    names
+                };
+
+                let addresses = {
+                    let mut addresses = HashSet::new();
+                    addresses.insert(self.address.to_vcard_property().unwrap());
+
+                    addresses
+                };
+
+                let telephones = {
+                    let mut telephones = HashSet::new();
+                    telephones.insert(self.telephone.to_vcard_property().unwrap());
+                    
+                    telephones
+                };
+
+                vcard.names = Some(vcard::Set::from_hash_set(names).unwrap());
+                vcard.addresses = Some(vcard::Set::from_hash_set(addresses).unwrap());
+                vcard.telephones = Some(vcard::Set::from_hash_set(telephones).unwrap());
+
+                Ok(vcard)
+            }
+            Err(err) => Err(err),
+        }
+    }
+    fn generate_pdf(&self) -> Result<String, ()>{
+        let regular_bytes = include_bytes!("/usr/share/fonts/liberation/LiberationSans-Regular.ttf");
+        let regular_font_data = fonts::FontData::new(regular_bytes.to_vec(), Some(printpdf::BuiltinFont::Helvetica)).expect("font data should be correct");
+
+        let bold_bytes = include_bytes!("/usr/share/fonts/liberation/LiberationSans-Bold.ttf");
+        let bold_font_data = fonts::FontData::new(bold_bytes.to_vec(), Some(printpdf::BuiltinFont::HelveticaBold)).expect("font data should be correct");
+
+        let italic_bytes = include_bytes!("/usr/share/fonts/liberation/LiberationSans-Italic.ttf");
+        let italic_font_data = fonts::FontData::new(italic_bytes.to_vec(), Some(printpdf::BuiltinFont::HelveticaOblique)).expect("font data should be correct");
+
+        let bold_italic_bytes = include_bytes!("/usr/share/fonts/liberation/LiberationSans-BoldItalic.ttf");
+        let bold_italic_font_data = fonts::FontData::new(bold_italic_bytes.to_vec(), Some(printpdf::BuiltinFont::HelveticaBoldOblique)).expect("font data should be correct");
+
+        let font_family = fonts::FontFamily{ 
+            regular: regular_font_data, 
+            bold: bold_font_data, 
+            italic: italic_font_data, 
+            bold_italic: bold_italic_font_data 
+        };
+
+        let mut doc = genpdf::Document::new(font_family);
+
+        doc.set_title("BCard test");
+        doc.set_minimal_conformance();
+        doc.set_margins(10);
+        doc.set_line_spacing(1.25);
+
+        doc.push(
+            elements::Paragraph::new("genpdf Demo Document")
+                .aligned(elements::Alignment::Center)
+                .styled(style::Style::new().bold().with_font_size(20)),
+        );
+
+        // TODO fill doc with real data
+
+        let mut buf: Vec<u8> = Vec::new();
+        match doc.render(&mut buf) {
+            Ok(_) => Ok(match String::from_utf8(buf) {
+                Ok(s) => s,
+                Err(_) => return Err(()),
+            }),
+            Err(_) => Err(()),
+        }
+    }
+}
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