commit d075b14564a6eaf69a9f2e90c876be65e53def77
Author: droideparanoico <david.alvarez.81@gmail.com>
Date:   Sat Feb 13 11:47:33 2021 +0100

    Initial commit

diff --git a/.gitignore b/.gitignore
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index 0000000..e495677
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,6 @@
+/.gradle/
+/.idea/
+/build/
+/gradle/
+/gradlew.bat
+/gradlew
diff --git a/LICENSE.md b/LICENSE.md
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--- /dev/null
+++ b/LICENSE.md
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2021 droideparanoico
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
\ No newline at end of file
diff --git a/README.md b/README.md
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--- /dev/null
+++ b/README.md
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+
+<h1>Code Sharing Platform</h1>
+
+Web service to store syntax highlighted code snippets generating unique identifiers with the added possibility of configure its self-deletion based on time and views limitations.  
+
+There are two possible interfaces: API and web. The API interface returns data as `JSON`, while the web interface uses `HTML`, `JS`, and `CSS`.
+
+<h2>Web interface endpoints</h2>
+
+* `GET /` should return the starting page:
+  
+  ![](src/main/resources/img/index.png)
+* `GET /code/new` should return the page that allows to save a new snippet:
+  
+  ![](src/main/resources/img/new_snippet.png)
+* `GET /code/UUID` should return the page with associated code snippet:
+  
+  ![](src/main/resources/img/snippet.png)
+* `GET /code/latest` should return the page with 10 most recently uploaded unrestricted code snippets:
+  
+  ![](src/main/resources/img/latest.png)
+<h2>API interface endpoints</h2>
+  
+* `GET /api/code/new` should take a JSON object with a field `code` and two other fields:
+  
+  &nbsp;&nbsp;&nbsp;&nbsp;1. `time` field containing the time (in seconds) during which the snippet is accessible.
+  
+  &nbsp;&nbsp;&nbsp;&nbsp;2. `views` field containing a number of views allowed for this snippet.
+  
+  And return JSON with a single field id:
+  
+  ![](src/main/resources/img/api_new_snippet.png)
+* `GET /api/code/UUID` should return a JSON object with associated code snippet:
+  
+  ![](src/main/resources/img/api_snippet.png)
+* `GET /api/code/latest` should return a JSON array the 10 most recently uploaded unrestricted code snippets:
+  
+  ![](src/main/resources/img/api_latest.png)
\ No newline at end of file
diff --git a/build.gradle b/build.gradle
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--- /dev/null
+++ b/build.gradle
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+plugins {
+    id 'org.springframework.boot' version '2.3.3.RELEASE'
+    id 'java'
+}
+
+apply plugin: 'io.spring.dependency-management'
+
+sourceCompatibility = 11
+
+repositories {
+    mavenCentral()
+}
+
+sourceSets.main.resources.srcDirs = ["src/main/resources"]
+
+dependencies {
+    runtimeOnly 'com.h2database:h2'
+    implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
+    implementation 'org.springframework.boot:spring-boot-starter'
+    implementation 'org.springframework.boot:spring-boot-starter-actuator'
+    implementation 'org.springframework.boot:spring-boot-starter-freemarker'
+    compile("org.springframework.boot:spring-boot-starter-web")
+    compile group: 'com.fasterxml.jackson.core', name: 'jackson-annotations', version: '2.12.1'
+    testImplementation('org.springframework.boot:spring-boot-starter-test')
+}
\ No newline at end of file
diff --git a/src/main/java/com/droideparanoico/codesharingplatform/CodeSharingPlatform.java b/src/main/java/com/droideparanoico/codesharingplatform/CodeSharingPlatform.java
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index 0000000..e804351
--- /dev/null
+++ b/src/main/java/com/droideparanoico/codesharingplatform/CodeSharingPlatform.java
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+package com.droideparanoico.codesharingplatform;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class CodeSharingPlatform {
+
+    public static void main(String[] args) {
+        SpringApplication.run(CodeSharingPlatform.class, args);
+    }
+
+}
diff --git a/src/main/java/com/droideparanoico/codesharingplatform/controller/ApiController.java b/src/main/java/com/droideparanoico/codesharingplatform/controller/ApiController.java
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--- /dev/null
+++ b/src/main/java/com/droideparanoico/codesharingplatform/controller/ApiController.java
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+package com.droideparanoico.codesharingplatform.controller;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.web.bind.annotation.*;
+import com.droideparanoico.codesharingplatform.model.CodeSnippet;
+import com.droideparanoico.codesharingplatform.service.CodeSnippetService;
+
+import java.util.Collection;
+import java.util.Map;
+
+@RestController
+@RequestMapping("/api/code")
+public class ApiController {
+
+    private CodeSnippetService codeSnippetService;
+
+    @Qualifier("codeSnippetService")
+    @Autowired
+    public void setService(CodeSnippetService service) {
+        this.codeSnippetService = service;
+    }
+
+    @GetMapping(path = "/{uuid}")
+    public CodeSnippet getCodeApi(@PathVariable String uuid) {
+        return codeSnippetService.getCodeSnippetById(uuid);
+    }
+
+    @GetMapping(path = "/latest")
+    public Collection<CodeSnippet> getLatestCodeApi() {
+        return codeSnippetService.findLatestUnrestricted();
+    }
+
+    @PostMapping(path = "/new", produces = "application/json;charset=UTF-8")
+    public Map<String, String> createNewCodeApi(@RequestBody CodeSnippet codeSnippet) {
+        CodeSnippet responseCode = codeSnippetService.saveCodeSnippet(codeSnippet);
+        return Map.of("id", responseCode.getUuid());
+    }
+}
diff --git a/src/main/java/com/droideparanoico/codesharingplatform/controller/WebController.java b/src/main/java/com/droideparanoico/codesharingplatform/controller/WebController.java
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index 0000000..c79cc40
--- /dev/null
+++ b/src/main/java/com/droideparanoico/codesharingplatform/controller/WebController.java
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+package com.droideparanoico.codesharingplatform.controller;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.*;
+import com.droideparanoico.codesharingplatform.model.CodeSnippet;
+import com.droideparanoico.codesharingplatform.service.CodeSnippetService;
+
+import java.util.*;
+
+@Controller
+@RequestMapping("/")
+public class WebController {
+
+    private CodeSnippetService codeSnippetService;
+
+    @Qualifier("codeSnippetService")
+    @Autowired
+    public void setService(CodeSnippetService service) {
+        this.codeSnippetService = service;
+    }
+
+    @GetMapping(path = "/", produces = "text/html")
+    public String index() {
+        return "index";
+    }
+
+    @GetMapping(path = "/code/{uuid}", produces = "text/html")
+    public String getCodeWeb(Model model, @PathVariable String uuid) {
+        model.addAttribute("codeSnippet", codeSnippetService.getCodeSnippetById(uuid));
+        return "snippet";
+    }
+
+    @GetMapping(path = "/code/latest", produces = "text/html")
+    public String getLatestCodeWeb(Model model) {
+        if (codeSnippetService.findLatestUnrestricted() != null) {
+            Collection<CodeSnippet> snippetCollection = codeSnippetService.findLatestUnrestricted();
+            List<CodeSnippet> snippetList = new ArrayList<>(snippetCollection);
+            model.addAttribute("codeSnippets",snippetList);
+        }
+        return "latest";
+    }
+
+    @GetMapping(path = "/code/new", produces = "text/html")
+    public String createNewCodeWeb() {
+        return "new_snippet";
+    }
+}
diff --git a/src/main/java/com/droideparanoico/codesharingplatform/model/CodeSnippet.java b/src/main/java/com/droideparanoico/codesharingplatform/model/CodeSnippet.java
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--- /dev/null
+++ b/src/main/java/com/droideparanoico/codesharingplatform/model/CodeSnippet.java
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+package com.droideparanoico.codesharingplatform.model;
+
+import com.fasterxml.jackson.annotation.JsonGetter;
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+import javax.persistence.*;
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+import java.time.temporal.ChronoUnit;
+
+@Entity
+@Table(name="snippets")
+public class CodeSnippet {
+
+    @Id
+    @JsonProperty(access = JsonProperty.Access.WRITE_ONLY)
+    private String uuid;
+    private LocalDateTime date;
+    @Lob
+    @Column
+    private String code;
+    private Long time = 0L;
+    private Integer views = 0;
+    @JsonProperty(access = JsonProperty.Access.WRITE_ONLY)
+    private boolean timeRestricted;
+    @JsonProperty(access = JsonProperty.Access.WRITE_ONLY)
+    private boolean viewRestricted;
+
+    static DateTimeFormatter formatter = DateTimeFormatter.ofPattern("dd/MM/yyyy HH:mm:ss");
+
+    public String getUuid() {
+        return uuid;
+    }
+
+    public void setUuid(String uuid) {
+        this.uuid = uuid;
+    }
+
+    public LocalDateTime getDate() {
+        return date;
+    }
+
+    @JsonProperty("date")
+    public String getFormattedDate() {
+        return date == null ? "" : formatter.format(date);
+    }
+
+    public void setDate(LocalDateTime date) {
+        this.date = date;
+    }
+
+    public String getCode() {
+        return code;
+    }
+
+    public void setCode(String code) {
+        this.code = code;
+    }
+
+    public Long getTime() {
+        return time;
+    }
+
+    @JsonGetter("time")
+    public Long getTimeAvailable() {
+        return time == 0 ? 0 : time - date.until(LocalDateTime.now(), ChronoUnit.SECONDS);
+    }
+
+    public void setTime(Long time) {
+        this.time = time;
+    }
+
+    public Integer getViews() {
+        return views;
+    }
+
+    public void setViews(Integer views) {
+        this.views = views;
+    }
+
+    public boolean isTimeRestricted() {
+        return timeRestricted;
+    }
+
+    public void setTimeRestricted(boolean timeRestricted) {
+        this.timeRestricted = timeRestricted;
+    }
+
+    public boolean isViewRestricted() {
+        return viewRestricted;
+    }
+
+    public void setViewRestricted(boolean viewRestricted) {
+        this.viewRestricted = viewRestricted;
+    }
+}
diff --git a/src/main/java/com/droideparanoico/codesharingplatform/repository/CodeSnippetRepository.java b/src/main/java/com/droideparanoico/codesharingplatform/repository/CodeSnippetRepository.java
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--- /dev/null
+++ b/src/main/java/com/droideparanoico/codesharingplatform/repository/CodeSnippetRepository.java
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+package com.droideparanoico.codesharingplatform.repository;
+
+import org.springframework.data.repository.CrudRepository;
+import com.droideparanoico.codesharingplatform.model.CodeSnippet;
+
+import java.util.Collection;
+
+public interface CodeSnippetRepository extends CrudRepository<CodeSnippet, String> {
+
+    Collection<CodeSnippet> findTop10ByTimeEqualsAndViewsEqualsOrderByDateDesc(Long time, Integer views);
+}
\ No newline at end of file
diff --git a/src/main/java/com/droideparanoico/codesharingplatform/service/CodeSnippetService.java b/src/main/java/com/droideparanoico/codesharingplatform/service/CodeSnippetService.java
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--- /dev/null
+++ b/src/main/java/com/droideparanoico/codesharingplatform/service/CodeSnippetService.java
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+package com.droideparanoico.codesharingplatform.service;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.stereotype.Service;
+import org.springframework.web.server.ResponseStatusException;
+import com.droideparanoico.codesharingplatform.model.CodeSnippet;
+import com.droideparanoico.codesharingplatform.repository.CodeSnippetRepository;
+
+import java.time.LocalDateTime;
+import java.util.Collection;
+import java.util.UUID;
+
+@Service("codeSnippetService")
+public class CodeSnippetService {
+
+    private final CodeSnippetRepository codeSnippetRepository;
+
+    public CodeSnippetService(CodeSnippetRepository codeSnippetRepository) {
+        this.codeSnippetRepository = codeSnippetRepository;
+    }
+
+    public CodeSnippet getCodeSnippetById(final String uuid) {
+        CodeSnippet codeSnippet = codeSnippetRepository.findById(uuid).orElseThrow(
+                () -> new ResponseStatusException(HttpStatus.NOT_FOUND));
+
+        if (codeSnippet.isViewRestricted()) {
+            checkViewsRestriction(codeSnippet);
+        }
+
+        if (codeSnippet.isTimeRestricted()) {
+            checkTimeRestriction(codeSnippet);
+        }
+
+        return codeSnippetRepository.save(codeSnippet);
+    }
+
+    public CodeSnippet saveCodeSnippet(final CodeSnippet codeSnippet) {
+        codeSnippet.setUuid(UUID.randomUUID().toString());
+        codeSnippet.setDate(LocalDateTime.now());
+        codeSnippet.setTimeRestricted(codeSnippet.getTime() > 0);
+        codeSnippet.setViewRestricted(codeSnippet.getViews() > 0);
+
+        return codeSnippetRepository.save(codeSnippet);
+    }
+
+    public Collection<CodeSnippet> findLatestUnrestricted() {
+        return codeSnippetRepository.findTop10ByTimeEqualsAndViewsEqualsOrderByDateDesc(0L, 0);
+    }
+
+    private void checkViewsRestriction(final CodeSnippet codeSnippet) {
+        if (codeSnippet.getViews() > 0) {
+            codeSnippet.setViews(codeSnippet.getViews() - 1);
+        } else {
+            deleteSnippet(codeSnippet);
+        }
+    }
+
+    private void checkTimeRestriction(final CodeSnippet codeSnippet) {
+        if (codeSnippet.getTimeAvailable() < 0) {
+            deleteSnippet(codeSnippet);
+        }
+    }
+
+    private void deleteSnippet(final CodeSnippet codeSnippet) {
+        codeSnippetRepository.delete(codeSnippet);
+        throw new ResponseStatusException(HttpStatus.NOT_FOUND);
+    }
+}
diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties
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+server.port=8889
+management.endpoints.web.exposure.include=*
+management.endpoint.shutdown.enabled=true
+
+spring.datasource.url=jdbc:h2:file:../snippets
+spring.datasource.driverClassName=org.h2.Driver
+spring.datasource.username=sa
+spring.datasource.password=password
+
+spring.jpa.database-platform=org.hibernate.dialect.H2Dialect
+spring.jpa.hibernate.ddl-auto=update
+
+spring.h2.console.enabled=true
+spring.h2.console.settings.trace=false
+spring.h2.console.settings.web-allow-others=false
diff --git a/src/main/resources/img/api_latest.png b/src/main/resources/img/api_latest.png
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diff --git a/src/main/resources/img/index.png b/src/main/resources/img/index.png
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diff --git a/src/main/resources/img/new_snippet.png b/src/main/resources/img/new_snippet.png
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diff --git a/src/main/resources/img/snippet.png b/src/main/resources/img/snippet.png
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diff --git a/src/main/resources/templates/index.ftlh b/src/main/resources/templates/index.ftlh
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+++ b/src/main/resources/templates/index.ftlh
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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <title>Code sharing platform</title>
+    <meta charset="UTF-8">
+    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css">
+    <link rel="stylesheet"
+          href="//cdn.jsdelivr.net/gh/highlightjs/cdn-release@10.2.1/build/styles/default.min.css">
+    <script src="//cdn.jsdelivr.net/gh/highlightjs/cdn-release@10.2.1/build/highlight.min.js"></script>
+</head>
+<body>
+<div class="jumbotron col-sm-8 mx-auto mt-4">
+    <h1 class="display-4">Code sharing platform</h1>
+    <p class="lead">Web service to store syntax highlighted code snippets generating unique identifiers with the added possibility of configure its self-deletion based on time and views limitations.</p>
+    <hr class="my-4">
+    <div class="row">
+        <div class="col">
+            <a class="btn btn-primary btn-lg d-flex justify-content-center" href="http://localhost:8889/code/new" role="button">Create new snippet</a>
+        </div>
+        <div class="col">
+            <a class="btn btn-primary btn-lg d-flex justify-content-center" href="http://localhost:8889/code/latest" role="button">See latest snippets</a>
+        </div>
+    </div>
+</div>
+</body>
+</html>
\ No newline at end of file
diff --git a/src/main/resources/templates/latest.ftlh b/src/main/resources/templates/latest.ftlh
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--- /dev/null
+++ b/src/main/resources/templates/latest.ftlh
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <title>Latest</title>
+    <meta charset="UTF-8">
+    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css">
+    <link rel="stylesheet"
+          href="//cdn.jsdelivr.net/gh/highlightjs/cdn-release@10.2.1/build/styles/default.min.css">
+    <script src="//cdn.jsdelivr.net/gh/highlightjs/cdn-release@10.2.1/build/highlight.min.js"></script>
+    <script>hljs.initHighlightingOnLoad();</script>
+</head>
+<body>
+<h1 class="col-sm-8 mx-auto mt-4">Latest snippets</h1>
+<#if codeSnippets??>
+    <#list codeSnippets as codeSnippet>
+        <div class="col-sm-8 mx-auto mt-4 d-flex">
+            <div class="card">
+                <div class="card-body">
+                    <span class="card-title" id="load_date">${codeSnippet.formattedDate}</span>
+                    <pre id="code_snippet" class="card-text"><code>${codeSnippet.code}</code></pre>
+                </div>
+            </div>
+        </div>
+    </#list>
+</#if>
+</body>
+</html>
\ No newline at end of file
diff --git a/src/main/resources/templates/new_snippet.ftlh b/src/main/resources/templates/new_snippet.ftlh
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--- /dev/null
+++ b/src/main/resources/templates/new_snippet.ftlh
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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css">
+    <title>Create</title>
+</head>
+<body>
+<h1 class="col-sm-8 mx-auto mt-4">New snippet</h1>
+<div class="col-sm-8 mx-auto mt-4 d-flex">
+    <div class="card" style="min-width: 100%">
+        <div class="card-body">
+            <form>
+                <div class="form-group">
+                    <textarea class="form-control" rows="5" id="code_snippet" placeholder="// write your code here"></textarea>
+                </div>
+                <div class="container">
+                    <div class="row align-items-end">
+                        <div class="col">
+                            <label for="time_restriction">Expiration seconds:</label>
+                            <input type="number" min="0" class="form-control" style="max-width: 120px" id="time_restriction">
+                        </div>
+                        <div class="col">
+                            <label for="views_restriction">Expiration views:</label>
+                            <input type="number" min="0" class="form-control" style="max-width: 120px" id="views_restriction">
+                        </div>
+                        <div class="col">
+                            <div class="float-right">
+                                <button id="send_snippet" type="submit" class="btn btn-primary btn-lg" onclick="send();">Save snippet</button>
+                            </div>
+                        </div>
+                    </div>
+                </div>
+
+                <script>
+                    window.onload = function(){
+                        document.getElementById("time_restriction").value=0
+                        document.getElementById("views_restriction").value=0
+                    };
+                    function send() {
+                        let object = {
+                            "code": document.getElementById("code_snippet").value,
+                            "time": document.getElementById("time_restriction").value,
+                            "views": document.getElementById("views_restriction").value
+                        };
+                        let json = JSON.stringify(object);
+                        let xhr = new XMLHttpRequest();
+                        xhr.open("POST", '/api/code/new', false)
+                        xhr.setRequestHeader('Content-type', 'application/json; charset=utf-8');
+                        xhr.send(json);
+                        if (xhr.status === 200) {
+                            let uuid = xhr.responseText.substring(6, xhr.responseText.length - 1);
+                            alert("Success! new snippet: " + uuid);
+                            window.open("http://localhost:8889/code/" + uuid.replace(/"/g, ""));
+                        }
+                    }
+                </script>
+            </form>
+        </div>
+    </div>
+</div>
+</body>
+</html>
\ No newline at end of file
diff --git a/src/main/resources/templates/snippet.ftlh b/src/main/resources/templates/snippet.ftlh
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--- /dev/null
+++ b/src/main/resources/templates/snippet.ftlh
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <title>Code</title>
+    <meta charset="UTF-8">
+    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css">
+    <link rel="stylesheet"
+          href="//cdn.jsdelivr.net/gh/highlightjs/cdn-release@10.2.1/build/styles/default.min.css">
+    <script src="//cdn.jsdelivr.net/gh/highlightjs/cdn-release@10.2.1/build/highlight.min.js"></script>
+    <script>hljs.initHighlightingOnLoad();</script>
+</head>
+<body>
+<div class="col-sm-8 mx-auto mt-4 d-flex">
+    <div class="card">
+        <div class="card-body">
+            <#if codeSnippet??>
+                <span class="card-title" id="load_date">${codeSnippet.formattedDate}</span>
+                <pre id="code_snippet" class="card-text"><code>${codeSnippet.code}</code></pre>
+                <#if (codeSnippet.isViewRestricted())>
+                    <span id="views_restriction">${codeSnippet.views} more views allowed</span>
+                    <br>
+                </#if>
+                <#if (codeSnippet.isTimeRestricted())>
+                    <span id="time_restriction">This code will be available for ${codeSnippet.timeAvailable} seconds</span>
+                </#if>
+            </#if>
+        </div>
+    </div>
+</div>
+</body>
+</html>
\ No newline at end of file
diff --git a/src/test/java/com/droideparanoico/codesharingplatform/CodeSharingPlatformTest.java b/src/test/java/com/droideparanoico/codesharingplatform/CodeSharingPlatformTest.java
new file mode 100644
index 0000000..d2eb135
--- /dev/null
+++ b/src/test/java/com/droideparanoico/codesharingplatform/CodeSharingPlatformTest.java
@@ -0,0 +1,12 @@
+package com.droideparanoico.codesharingplatform;
+
+import org.springframework.boot.test.context.SpringBootTest;
+import org.junit.Test;
+
+@SpringBootTest
+public class CodeSharingPlatformTest {
+
+    @Test
+    public void contextLoads() {
+    }
+}