33 changed files with 1774 additions and 534 deletions
--- a/assets/images/background.webp
+++ b/assets/images/background.webp
--- a/config.toml
+++ b/config.toml
@ -43,16 +43,16 @@ enableRobotsTXT = true
 [params]
    ## Tagline of your site. Displays in the header,
    ## just below the title
-    tagline = ""
+    tagline = "Using the Midnight theme"
    ## Description of your site - for use in SEO
-    description = "Programming Website"
+    description = "A useful description for search engine results"
    ## 'authorbox' enables/disables the authorbox sitewide (can be disabled per page).
    ## 'author' is the name of the default author of all pages (can change per page).
    ## See also: https://bluestnight.com/docs/midnight/users/pages/authorbox/
-    authorbox = true
+    #authorbox = false
-    author = "Rohan Sircar"
+    #author = "Some Guy"
    ## Optimize site for HTTP/2. Recommended if your server supports it.
    http2 = true
@ -72,10 +72,10 @@ enableRobotsTXT = true
    #no_minimize = true
    ## Set a site-wide notice for all visitors to all pages.
-#     alert = """
+    alert = """
-# Interested in using Midnight? Check out the [getting started](https://bluestnight.com/guides/midnight/getting-started/)
+Interested in using Midnight? Check out the [getting started](https://bluestnight.com/guides/midnight/getting-started/)
-# guide and the [user documentation](https://bluestnight.com/docs/midnight/users/) for more information.
+guide and the [user documentation](https://bluestnight.com/docs/midnight/users/) for more information.
-#     """
+    """
 ## Midnight can integrate custom shortcodes into the theme. For more
 ## about this, see https://bluestnight.com/docs/midnight/developers/
@ -183,7 +183,7 @@ enableRobotsTXT = true
 ## See also: https://bluestnight.com/docs/midnight/users/site/social-icons/
 [params.social]
    gitlab = "BluestNight/Midnight"
-    gitea = "nova"
+    gitea = "nova99"
 ## Options used while generating server configuration files.
 ## See https://bluestnight.com/docs/midnight/users/server/ for more.
@ -192,7 +192,6 @@ enableRobotsTXT = true
    #hsts = true
    #root = "/var/www/example.com
 ## Enable/disable sidebar widgets
 ## Enable/disable sidebar widgets
 [params.sidebar]
    ## Specify the order you want sidebar widgets to appear in.
@ -225,7 +224,6 @@ enableRobotsTXT = true
    #[params.sidebar.patreon]
        #username = "username"
 ## Define output formats for different kinds of pages
 [outputs]
    ## CSS is required in order for Midnight to generate your stylesheet
--- a/content/about.md
+++ b/content/about.md
@ -1,18 +1,19 @@
 +++
-title = "About"
+title = "About Hugo"
-hide_authorbox = true
+date = "2014-04-09"
 disable_comments = true
 menu = "main"
 weight = 4
 draft = false
 +++
-Hi, I'm Rohan Sircar and this is my website. I like programming, and building cool stuff. 
+Hugo is the **world’s fastest framework for building websites**. It is written in Go.
-I am interested in building fast, efficient, robust, fault-tolerant systems, for which I lean on the functional programming paradigm. My languages of choice are Scala and Rust.
+It makes use of a variety of open source projects including:
-I like making GUIs, web applications, desktop applications and devops.
+* https://github.com/russross/blackfriday
 * https://github.com/alecthomas/chroma
 * https://github.com/muesli/smartcrop
 * https://github.com/spf13/cobra
 * https://github.com/spf13/viper
-I like learning new things and experimenting. I am currently studying reactive programming in Play framework and Spring Reactive Web, and microservice development.
+Learn more and contribute on [GitHub](https://github.com/gohugoio).
 I have a Master's Degree in Computer Science from a reputed Indian College.
--- a/content/post/_index.md
+++ b/content/post/_index.md
@ -2,5 +2,9 @@
 title = "Posts"
 menu = "main"
 weight = 1
 hide_list = false
 +++
 Index page
 ```
 $ sudo apt update
 # this is a comment
 ```
--- a/content/post/a-tale-of-decision-trees-java-opencl.md
+++ b/content/post/a-tale-of-decision-trees-java-opencl.md
@ -1,63 +0,0 @@
 +++
 title = " A tale of Decision Trees, Java and OpenCL"
 date = "2019-10-02T17:53:52+05:30"
 hide_authorbox = false
 disable_comments = false
 draft = false
 categories = [
    "Development"
 ]
 tags = [
    "opencl",
    "java",
    "ai",
    "Machine Learning",
    "id3",
    "Decision Tree",
    "gpgpu"
 ]
 opacity = false
 sidebar =  { "disable" = true }
 featured_image = "/img/decisiontree.webp"
 +++
 I worked on a decision tree program in java for my final year MSc project. In a series of posts such as this one, I'll be highlighting some of the aspects of it's creation and implementation.
 A bit of background - this project is of great signficance to me, one reason being that it had many firsts - my first proper java project, my first foray into machine learning and GPGPU programming, my first GUI program, to mention a few. It was also when I realized that I could actually enjoy programming.
 I also had to face significant adversities while working on it, none of which I'd disclose publicly. But yeah, I was going through a bad time, and yet I still managed to finish my project, clear all my exams and get my master's degree - a fact that I'm proud of.
 Now for the project itself.. 
 ### Decision Tree 
 Decision Tree is a machine learning algorithm which creates a model of the given data set in the form a tree. This tree can then be used for prediction.
 ![Decison Tree](/img/decisiontree.webp)
 #### <p align="center"> Figure - A Decision Tree</p>
 A major challenge in implementing this form of decision tree was that the number of children of the nodes is not constant. Thus a simple binary tree wouldn't suffice. I had to use an n-ary tree data structure that I also had to create myself.
 ### ID3
 I used ID3 as the algorithm for partitioning the data set and creating the decision tree. ID3 is a greedy algorithm that uses the concept of entropy to decide where to split the data in order to partition it. ID3 splits the data set recursively until it reaches the terminating condition(s), and each split point becomes a node of the tree.
 ### OpenCL
 I also worked on incorporating GPU acceleration into this project. While I had an Nvidia GPU, I still chose to go with OpenCL over CUDA, and the major benefit was that I could prototype on my laptop despite it not having a  GPU(the code would just run on CPU) and then run it on my desktop which had a GPU.
 #### Other stuff - MySQL, Swing etc
 Some of the other stuff I used were mysql - for storing the data sets. I didn't know about hibernate at this point so I 'simply' used JDBC , and swing - for creating the GUI.
 That's it for now. In the next post I'll talk about the system overview and architecture. Stay tuned!
 ![System Architecture](/img/sysarch.webp)
 Cover image source: https://www.sciencemag.org/
--- a/content/post/chatto.md
+++ b/content/post/chatto.md
@ -1,51 +0,0 @@
 +++
 title = "Chatto"
 date = "2020-06-02T00:42:12+05:30"
 draft = false
 categories = [
    "Development"
 ]
 tags = [
    "java",
    "spring-boot",
    "hibernate",
    "self-hosted",
    "e2ee",
    "encryption",
    "typescript"
 ]
 featured_image = "/img/chatto.webp"
 +++
 Some time back while I was speaking with a friend of mine on Facebook, the topic of privacy came up - I no longer wanted to use Facebook. Unfortunately, he was kinda old school - he did not have a smartphone so we could not use Signal. So, inspired by Signal, I took it as a challenge to create an end to end encrypted messaging application. Yeah, I know I could use something like Matrix, but where's the fun in that.
 I started formulating the design goals and issues. The initial draft looked something like this 
 ### Design goals
 1. Messages must be encrypted end to end
 2. Should be open source and self hostable
 3. Must not require any personal, identifiable information like email
 4. Must not rely on any external services
 5. Should be easy to use, even for a lay person
 ### Design Issues
 1. Choice of language and framework - for both backend and frontend
 2. End to end encryption means JS must be used (privacy conscious users tend to keep JS disabled)
 3. Corollary to 2, the choice of encryption algorithm and JS library
 For point 1, I chose Spring Boot as the backend framework with JPA/Hibernate to communicate with the DB after experimenting with plain servlets and Struts. For the frontend, I first prototyped in JavaScript, and then eventually when it got unwieldy, I started modularizing it with browserify and eventually switched to TypeScript.
 For point 2, you can't have E2EE in a browser without JS. Fortunately, the app is open source so the code can be audited, and it can be self hosted so you don't have to suspect someone rigging the source code. Also, I implemented the chat functionality using a JSON API, so non browser clients can be created that don't use JS.
 For point 3, I heard good things about SJCL so I went with it, but it's not maintained any more. I eventually plan to replace it with the browser native WebCrypto API.
 You can find the app homepage [here](/projects/chatto-a-self-hosted-e2ee-chat-application/)
--- a/content/post/creating-a-new-theme.md
+++ b/content/post/creating-a-new-theme.md
--- a/content/post/dsl-based-sql-libraries.md
+++ b/content/post/dsl-based-sql-libraries.md
@ -1,185 +0,0 @@
 +++
 title = "Dsl Based Sql Libraries"
 date = "2020-06-04T12:11:16+05:30"
 featured_image="/img/dsl-based-sql-libraries.webp"
 categories = ["Development"]
 tags = [
    "slick", "scala","rust","diesel","kotlin","jOOQ"
 ]
 draft = false
 +++
 Note: This article is a work in progress
 > Databases are the heart of a web application
 When looking for relational database SQL libraries, there are various options to choose from:
 1. Object Relation Mappers(ORMs)
 2. DSL based
 3. String interpolation based
 Each approach has it's pro's and cons. ORM's are perhaps the most common/widely used, and their drawbacks are well documented and talked about, such as Object-Relational impedance mismatch, lack of control over generated SQL leading to performance problems, n+1 queries problem, and the promise of not having to deal with SQL only shifts that burden to having to maintain and configure the ORM itself.
 I used Hibernate(an ORM) for my project Chatto and it worked out fine, mostly. However while learning other programming languages like Scala and Rust, I came across the SQL libraries used in their ecosystem, and it really opened my eyes to the possibilities. In this article, I document my experience in learning these libraries.
 What these libraries have in common is that they 
 * Offer a DSL to write SQL queries in the host programming language
 * Offer code generation to generate table mappings from sql schema files
 * Most importantly, they offer the opportunity to write parts of query separately, and then compose them together to create larger queries.
 Let me explain that last point because it really is what's potentially amazing about this approach, and it is not offered by neither ORM's nor String interpolation based libraries.
 In JPQL, we'd write a query like this - 
 ``` 
 select u.id, u.name, u.join_date from User u where u.age > ?
 ```
 and then we need to repeat the select part again in another query -
 ``` 
 select u.id, u.name, u.join_date from User u where u.address = ?
 ```
 Not only is this not DRY, if we ever need to change the select statement, and we forget to update any one of the queries, it would lead to an error at runtime, not compile time.
 In a DSL based library, we could isolate the select portion like this - 
 ``` scala
 val selectUsers = Users.map(u => (u.id, u.name, u.join_date))
 ```
 and then we could use that fragment everywhere we need it - 
 ```scala 
 val users = selectUsers.filter(_.age > 10)
 val users2 = selectUsers.filter(_.address === "Some Address")
 ``` 
 So we were able to isolate the common portion out. If we need to update the select statement, we only need to update it at one place. If we forget to update any of the return types, we'll get an error at compile time. So we enforced type safety at compile time as well. Great!
 The benefits of this style is summarized best in this post I found on [Hacker News](https://news.ycombinator.com/item?id=14915156) - 
 > You can slice and dice a schema however you like, building up queries from other queries, none of which are run until you execute them. Basically you get semantically the same query plans as you'd get writing plain sql, but it's all type checked, sql injection safe, and compiled (queries generally are generated at compile time, not run time).
 The above code snippets are from Slick, which is a Scala library, and I'll talk about it now.
 ### Slick (Scala)
 Slick is a Functional Relational Mapper(FRM). It's aim is to enable writing SQL as if it were Scala collections.
 Slick offers code generation(using an sbt plugin), query composition, and an asynchronous API(although the underlying JDBC library is still blocking).
 Together with Flyway, it becomes really simple to get started. All we need to do is write the sql schema migration files, run flyway migration task, run slick codegen, and we can start writing SQL code in Scala. Slick puts the generated code in a Tables.Scala file that must be imported into DAOs.
 I found a really nice pattern of achieving query composition in slick [here](https://www.becompany.ch/en/blog/2016/12/15/slick-dos-and-donts). A potential pitfall of query composition is sharing the internals too much, and this pattern helps avoid that.
 What we do is constrain the query fragments inside an inner companion Object of an outer DBIO class - 
 ```scala
 case class UserDTO(id: Int, name: String, joinDate: Instant)
 class UserDBIO {
    ...
    object Query {
        val selectUsers = Users
            .map(u => (u.id, u.name, u.join_date).mapTo[UserDTO])
    }
 }
 ```
 and then inside the DBIO class, we write methods that return DBIOs - 
 ``` scala
    def getUserByAge(age: Int): DBIO[UserDTO] = {
        Query.selectUsers.filter(_.age > age).result
    }
    def getUserByAddress(address: String): DBIO[UserDTO] = {
        Query.selectUsers.filter(_.address === address).result
    }
 ```
 and then inside a service class, we can compose those DBIOs if we need -
 ```scala 
 class UserService @Inject() (dbio: UserDBIO) {
    def isSamePerson(age: Int, address: String): Future[Boolean] = {
        val action = for {
            user1 <- dbio.getUserByAge(age)
            user2 <- dbio.getUserByAddress(address)
        } yield (user1.id == user2.id)
        db.run(action.transactionally)       
    }
 }
 ``` 
 This is a very contrived example, but it does show how to compose two DBIOs into a single action, that run in a single transaction. Slick is asynchronous by default, so it returns a future which would eventually contain the result, instead of returning the result itself.
 ### Diesel (Rust)
 Diesel calls itself an ORM which means it must be similar to Hibernate but as we'll see, it's nothing like Hibernate and resembles Slick much more. Apparently, Diesel's design was influenced by Slick ([proof](https://news.ycombinator.com/item?id=14913517)).
 Diesel wraps code generation and migration in a single library. The set up phase is very similar to the Slick + Flyway method - write sql schema files, run migration, then run code generation. Diesel puts the generated code in a schema.rs file. 
 Query composition in Diesel works as follows - 
 ```rust
 mod query {
    use diesel::prelude::*;
    use diesel::sql_types::Text;
    use diesel::sql_types::Timestamp;
    use diesel::sqlite::Sqlite;
    /// <'a, B, T> where a = lifetime, B = Backend, T = SQL data types
    type Query<'a, B, T> = crate::schema::users::BoxedQuery<'a, B, T>;
    pub fn _get_user_by_name<'a>(
        user_name: &'a String,
    ) -> Query<'a, Sqlite, (Text, Timestamp)> {
        use crate::schema::users::dsl::*;
        users
            .select((name, created_at))
            .filter(name.eq(user_name))
            .into_boxed()
    }
 }
 ```
 and then this fragment can be used anywhere in the same file - 
 ``` rust
 let user =
    query::_get_user_by_name(&nu.name).first::<models::UserDTO>(conn)?;
 ```
 Since the query module is not public, it cannot be imported outside of the file it is defined in, and we achieve the same encapsulation behavior as we did in Slick. 
 Note that we need to write `` `into_boxed()` ``, unlike Slick. This is because Scala is an interpreted language and can automatically handle the conversion. Since Rust is a low-level language, we need to be explicit about the conversion. At least, that's my understanding :)
 You can find the full example [here](https://git.arcusiridis.com/nova/Actix-Demo/src/branch/master/src/actions/users.rs).
 ### JOOQ (Java, Kotlin, Scala)
 JOOQ is a type safe query building library with a fluent API. It supports all three of Java, Kotlin and Scala, however for some variety I'll be using Kotlin here.
 Setup works similarly as in Slick, with flyway for migration leading to code generation. The query API however is significantly different from Slick. The design goal of JOOQ is to put SQL at the forefront, and it shows in the API. Composition in JOOQ works as follows- 
 ``` kotlin
 class UserService(dsl: DSLContext) {
    suspend fun getUser(): Flow<String> = dsl
            .select(Query.selectUsers)
            .from(USERS)
            .where(Query.complexClause)
            .fetch()
            .map {it.get(USERS.NAME)}
            .asFlow()
    private object Query {
        val selectUsers = listOf(USERS.NAME, USERS.JOIN_DATE)
        // much complex wow
        val complexClause: Condition = USERS.AGE.gt(20)
    }
 }
 ```
 We follow the same query encapsulating pattern as earlier. We also make use of kotlin's suspend function feature and coroutine flow to work asynchronously.
--- a/content/post/goisforlovers.md
+++ b/content/post/goisforlovers.md
@ -0,0 +1,344 @@
 +++
 title = "(Hu)go Template Primer"
 description = ""
 tags = [
    "go",
    "golang",
    "templates",
    "themes",
    "development",
 ]
 date = "2014-04-02"
 categories = [
    "Development",
    "golang",
 ]
 +++
 Hugo uses the excellent [Go][] [html/template][gohtmltemplate] library for
 its template engine. It is an extremely lightweight engine that provides a very
 small amount of logic. In our experience that it is just the right amount of
 logic to be able to create a good static website. If you have used other
 template systems from different languages or frameworks you will find a lot of
 similarities in Go templates.
 This document is a brief primer on using Go templates. The [Go docs][gohtmltemplate]
 provide more details.
 ## Introduction to Go Templates
 Go templates provide an extremely simple template language. It adheres to the
 belief that only the most basic of logic belongs in the template or view layer.
 One consequence of this simplicity is that Go templates parse very quickly.
 A unique characteristic of Go templates is they are content aware. Variables and
 content will be sanitized depending on the context of where they are used. More
 details can be found in the [Go docs][gohtmltemplate].
 ## Basic Syntax
 Golang templates are HTML files with the addition of variables and
 functions.
 **Go variables and functions are accessible within {{ }}**
 Accessing a predefined variable "foo":
    {{ foo }}
 **Parameters are separated using spaces**
 Calling the add function with input of 1, 2:
    {{ add 1 2 }}
 **Methods and fields are accessed via dot notation**
 Accessing the Page Parameter "bar"
    {{ .Params.bar }}
 **Parentheses can be used to group items together**
    {{ if or (isset .Params "alt") (isset .Params "caption") }} Caption {{ end }}
 ## Variables
 Each Go template has a struct (object) made available to it. In hugo each
 template is passed either a page or a node struct depending on which type of
 page you are rendering. More details are available on the
 [variables](/layout/variables) page.
 A variable is accessed by referencing the variable name.
    <title>{{ .Title }}</title>
 Variables can also be defined and referenced.
    {{ $address := "123 Main St."}}
    {{ $address }}
 ## Functions
 Go template ship with a few functions which provide basic functionality. The Go
 template system also provides a mechanism for applications to extend the
 available functions with their own. [Hugo template
 functions](/layout/functions) provide some additional functionality we believe
 are useful for building websites. Functions are called by using their name
 followed by the required parameters separated by spaces. Template
 functions cannot be added without recompiling hugo.
 **Example:**
    {{ add 1 2 }}
 ## Includes
 When including another template you will pass to it the data it will be
 able to access. To pass along the current context please remember to
 include a trailing dot. The templates location will always be starting at
 the /layout/ directory within Hugo.
 **Example:**
    {{ template "chrome/header.html" . }}
 ## Logic
 Go templates provide the most basic iteration and conditional logic.
 ### Iteration
 Just like in Go, the Go templates make heavy use of range to iterate over
 a map, array or slice. The following are different examples of how to use
 range.
 **Example 1: Using Context**
    {{ range array }}
        {{ . }}
    {{ end }}
 **Example 2: Declaring value variable name**
    {{range $element := array}}
        {{ $element }}
    {{ end }}
 **Example 2: Declaring key and value variable name**
    {{range $index, $element := array}}
        {{ $index }}
        {{ $element }}
    {{ end }}
 ### Conditionals
 If, else, with, or, & and provide the framework for handling conditional
 logic in Go Templates. Like range, each statement is closed with `end`.
 Go Templates treat the following values as false:
 * false
 * 0
 * any array, slice, map, or string of length zero
 **Example 1: If**
    {{ if isset .Params "title" }}<h4>{{ index .Params "title" }}</h4>{{ end }}
 **Example 2: If -> Else**
    {{ if isset .Params "alt" }}
        {{ index .Params "alt" }}
    {{else}}
        {{ index .Params "caption" }}
    {{ end }}
 **Example 3: And & Or**
    {{ if and (or (isset .Params "title") (isset .Params "caption")) (isset .Params "attr")}}
 **Example 4: With**
 An alternative way of writing "if" and then referencing the same value
 is to use "with" instead. With rebinds the context `.` within its scope,
 and skips the block if the variable is absent.
 The first example above could be simplified as:
    {{ with .Params.title }}<h4>{{ . }}</h4>{{ end }}
 **Example 5: If -> Else If**
    {{ if isset .Params "alt" }}
        {{ index .Params "alt" }}
    {{ else if isset .Params "caption" }}
        {{ index .Params "caption" }}
    {{ end }}
 ## Pipes
 One of the most powerful components of Go templates is the ability to
 stack actions one after another. This is done by using pipes. Borrowed
 from unix pipes, the concept is simple, each pipeline's output becomes the
 input of the following pipe.
 Because of the very simple syntax of Go templates, the pipe is essential
 to being able to chain together function calls. One limitation of the
 pipes is that they only can work with a single value and that value
 becomes the last parameter of the next pipeline.
 A few simple examples should help convey how to use the pipe.
 **Example 1 :**
    {{ if eq 1 1 }} Same {{ end }}
 is the same as
    {{ eq 1 1 | if }} Same {{ end }}
 It does look odd to place the if at the end, but it does provide a good
 illustration of how to use the pipes.
 **Example 2 :**
    {{ index .Params "disqus_url" | html }}
 Access the page parameter called "disqus_url" and escape the HTML.
 **Example 3 :**
    {{ if or (or (isset .Params "title") (isset .Params "caption")) (isset .Params "attr")}}
    Stuff Here
    {{ end }}
 Could be rewritten as
    {{  isset .Params "caption" | or isset .Params "title" | or isset .Params "attr" | if }}
    Stuff Here
    {{ end }}
 ## Context (aka. the dot)
 The most easily overlooked concept to understand about Go templates is that {{ . }}
 always refers to the current context. In the top level of your template this
 will be the data set made available to it. Inside of a iteration it will have
 the value of the current item. When inside of a loop the context has changed. .
 will no longer refer to the data available to the entire page. If you need to
 access this from within the loop you will likely want to set it to a variable
 instead of depending on the context.
 **Example:**
      {{ $title := .Site.Title }}
      {{ range .Params.tags }}
        <li> <a href="{{ $baseurl }}/tags/{{ . | urlize }}">{{ . }}</a> - {{ $title }} </li>
      {{ end }}
 Notice how once we have entered the loop the value of {{ . }} has changed. We
 have defined a variable outside of the loop so we have access to it from within
 the loop.
 # Hugo Parameters
 Hugo provides the option of passing values to the template language
 through the site configuration (for sitewide values), or through the meta
 data of each specific piece of content. You can define any values of any
 type (supported by your front matter/config format) and use them however
 you want to inside of your templates.
 ## Using Content (page) Parameters
 In each piece of content you can provide variables to be used by the
 templates. This happens in the [front matter](/content/front-matter).
 An example of this is used in this documentation site. Most of the pages
 benefit from having the table of contents provided. Sometimes the TOC just
 doesn't make a lot of sense. We've defined a variable in our front matter
 of some pages to turn off the TOC from being displayed.
 Here is the example front matter:
 ```
 ---
 title: "Permalinks"
 date: "2013-11-18"
 aliases:
  - "/doc/permalinks/"
 groups: ["extras"]
 groups_weight: 30
 notoc: true
 ---
 ```
 Here is the corresponding code inside of the template:
      {{ if not .Params.notoc }}
        <div id="toc" class="well col-md-4 col-sm-6">
        {{ .TableOfContents }}
        </div>
      {{ end }}
 ## Using Site (config) Parameters
 In your top-level configuration file (eg, `config.yaml`) you can define site
 parameters, which are values which will be available to you in chrome.
 For instance, you might declare:
 ```yaml
 params:
  CopyrightHTML: "Copyright &#xA9; 2013 John Doe. All Rights Reserved."
  TwitterUser: "spf13"
  SidebarRecentLimit: 5
 ```
 Within a footer layout, you might then declare a `<footer>` which is only
 provided if the `CopyrightHTML` parameter is provided, and if it is given,
 you would declare it to be HTML-safe, so that the HTML entity is not escaped
 again.  This would let you easily update just your top-level config file each
 January 1st, instead of hunting through your templates.
 ```
 {{if .Site.Params.CopyrightHTML}}<footer>
 <div class="text-center">{{.Site.Params.CopyrightHTML | safeHtml}}</div>
 </footer>{{end}}
 ```
 An alternative way of writing the "if" and then referencing the same value
 is to use "with" instead. With rebinds the context `.` within its scope,
 and skips the block if the variable is absent:
 ```
 {{with .Site.Params.TwitterUser}}<span class="twitter">
 <a href="https://twitter.com/{{.}}" rel="author">
 <img src="/images/twitter.png" width="48" height="48" title="Twitter: {{.}}"
 alt="Twitter"></a>
 </span>{{end}}
 ```
 Finally, if you want to pull "magic constants" out of your layouts, you can do
 so, such as in this example:
 ```
 <nav class="recent">
  <h1>Recent Posts</h1>
  <ul>{{range first .Site.Params.SidebarRecentLimit .Site.Recent}}
    <li><a href="{{.RelPermalink}}">{{.Title}}</a></li>
  {{end}}</ul>
 </nav>
 ```
 [go]: https://golang.org/
 [gohtmltemplate]: https://golang.org/pkg/html/template/
--- a/content/post/hugoisforlovers.md
+++ b/content/post/hugoisforlovers.md
@ -0,0 +1,89 @@
 +++
 title = "Getting Started with Hugo"
 description = ""
 tags = [
    "go",
    "golang",
    "hugo",
    "development",
 ]
 date = "2014-04-02"
 categories = [
    "Development",
    "golang",
 ]
 +++
 ## Step 1. Install Hugo
 Go to [Hugo releases](https://github.com/spf13/hugo/releases) and download the
 appropriate version for your OS and architecture.
 Save it somewhere specific as we will be using it in the next step.
 More complete instructions are available at [Install Hugo](https://gohugo.io/getting-started/installing/)
 ## Step 2. Build the Docs
 Hugo has its own example site which happens to also be the documentation site
 you are reading right now.
 Follow the following steps:
 1. Clone the [Hugo repository](http://github.com/spf13/hugo)
 2. Go into the repo
 3. Run hugo in server mode and build the docs
 4. Open your browser to http://localhost:1313
 Corresponding pseudo commands:
    git clone https://github.com/spf13/hugo
    cd hugo
    /path/to/where/you/installed/hugo server --source=./docs
    > 29 pages created
    > 0 tags index created
    > in 27 ms
    > Web Server is available at http://localhost:1313
    > Press ctrl+c to stop
 Once you've gotten here, follow along the rest of this page on your local build.
 ## Step 3. Change the docs site
 Stop the Hugo process by hitting Ctrl+C.
 Now we are going to run hugo again, but this time with hugo in watch mode.
    /path/to/hugo/from/step/1/hugo server --source=./docs --watch
    > 29 pages created
    > 0 tags index created
    > in 27 ms
    > Web Server is available at http://localhost:1313
    > Watching for changes in /Users/spf13/Code/hugo/docs/content
    > Press ctrl+c to stop
 Open your [favorite editor](http://vim.spf13.com) and change one of the source
 content pages. How about changing this very file to *fix the typo*. How about changing this very file to *fix the typo*.
 Content files are found in `docs/content/`. Unless otherwise specified, files
 are located at the same relative location as the url, in our case
 `docs/content/overview/quickstart.md`.
 Change and save this file.. Notice what happened in your terminal.
    > Change detected, rebuilding site
    > 29 pages created
    > 0 tags index created
    > in 26 ms
 Refresh the browser and observe that the typo is now fixed.
 Notice how quick that was. Try to refresh the site before it's finished building. I double dare you.
 Having nearly instant feedback enables you to have your creativity flow without waiting for long builds.
 ## Step 4. Have fun
 The best way to learn something is to play with it.
--- a/content/post/migrate-from-jekyll.md
+++ b/content/post/migrate-from-jekyll.md
@ -0,0 +1,157 @@
 ---
 date: 2014-03-10
 linktitle: Migrating from Jekyll
 menu:
  main:
    parent: tutorials
 prev: /tutorials/mathjax
 title: Migrate to Hugo from Jekyll
 weight: 10
 ---
 ## Move static content to `static`
 Jekyll has a rule that any directory not starting with `_` will be copied as-is to the `_site` output. Hugo keeps all static content under `static`. You should therefore move it all there.
 With Jekyll, something that looked like
    ▾ <root>/
        ▾ images/
            logo.png
 should become
    ▾ <root>/
        ▾ static/
            ▾ images/
                logo.png
 Additionally, you'll want any files that should reside at the root (such as `CNAME`) to be moved to `static`.
 ## Create your Hugo configuration file
 Hugo can read your configuration as JSON, YAML or TOML. Hugo supports parameters custom configuration too. Refer to the [Hugo configuration documentation](/overview/configuration/) for details.
 ## Set your configuration publish folder to `_site`
 The default is for Jekyll to publish to `_site` and for Hugo to publish to `public`. If, like me, you have [`_site` mapped to a git submodule on the `gh-pages` branch](http://blog.blindgaenger.net/generate_github_pages_in_a_submodule.html), you'll want to do one of two alternatives:
 1. Change your submodule to point to map `gh-pages` to public instead of `_site` (recommended).
        git submodule deinit _site
        git rm _site
        git submodule add -b gh-pages git@github.com:your-username/your-repo.git public
 2. Or, change the Hugo configuration to use `_site` instead of `public`.
        {
            ..
            "publishdir": "_site",
            ..
        }
 ## Convert Jekyll templates to Hugo templates
 That's the bulk of the work right here. The documentation is your friend. You should refer to [Jekyll's template documentation](http://jekyllrb.com/docs/templates/) if you need to refresh your memory on how you built your blog and [Hugo's template](/layout/templates/) to learn Hugo's way.
 As a single reference data point, converting my templates for [heyitsalex.net](http://heyitsalex.net/) took me no more than a few hours.
 ## Convert Jekyll plugins to Hugo shortcodes
 Jekyll has [plugins](http://jekyllrb.com/docs/plugins/); Hugo has [shortcodes](/doc/shortcodes/). It's fairly trivial to do a port.
 ### Implementation
 As an example, I was using a custom [`image_tag`](https://github.com/alexandre-normand/alexandre-normand/blob/74bb12036a71334fdb7dba84e073382fc06908ec/_plugins/image_tag.rb) plugin to generate figures with caption when running Jekyll. As I read about shortcodes, I found Hugo had a nice built-in shortcode that does exactly the same thing.
 Jekyll's plugin:
    module Jekyll
      class ImageTag < Liquid::Tag
        @url = nil
        @caption = nil
        @class = nil
        @link = nil
        // Patterns
        IMAGE_URL_WITH_CLASS_AND_CAPTION =
        IMAGE_URL_WITH_CLASS_AND_CAPTION_AND_LINK = /(\w+)(\s+)((https?:\/\/|\/)(\S+))(\s+)"(.*?)"(\s+)->((https?:\/\/|\/)(\S+))(\s*)/i
        IMAGE_URL_WITH_CAPTION = /((https?:\/\/|\/)(\S+))(\s+)"(.*?)"/i
        IMAGE_URL_WITH_CLASS = /(\w+)(\s+)((https?:\/\/|\/)(\S+))/i
        IMAGE_URL = /((https?:\/\/|\/)(\S+))/i
        def initialize(tag_name, markup, tokens)
          super
          if markup =~ IMAGE_URL_WITH_CLASS_AND_CAPTION_AND_LINK
            @class   = $1
            @url     = $3
            @caption = $7
            @link = $9
          elsif markup =~ IMAGE_URL_WITH_CLASS_AND_CAPTION
            @class   = $1
            @url     = $3
            @caption = $7
          elsif markup =~ IMAGE_URL_WITH_CAPTION
            @url     = $1
            @caption = $5
          elsif markup =~ IMAGE_URL_WITH_CLASS
            @class = $1
            @url   = $3
          elsif markup =~ IMAGE_URL
            @url = $1
          end
        end
        def render(context)
          if @class
            source = "<figure class='#{@class}'>"
          else
            source = "<figure>"
          end
          if @link
            source += "<a href=\"#{@link}\">"
          end
          source += "<img src=\"#{@url}\">"
          if @link
            source += "</a>"
          end
          source += "<figcaption>#{@caption}</figcaption>" if @caption
          source += "</figure>"
          source
        end
      end
    end
    Liquid::Template.register_tag('image', Jekyll::ImageTag)
 is written as this Hugo shortcode:
    <!-- image -->
    <figure {{ with .Get "class" }}class="{{.}}"{{ end }}>
        {{ with .Get "link"}}<a href="{{.}}">{{ end }}
            <img src="{{ .Get "src" }}" {{ if or (.Get "alt") (.Get "caption") }}alt="{{ with .Get "alt"}}{{.}}{{else}}{{ .Get "caption" }}{{ end }}"{{ end }} />
        {{ if .Get "link"}}</a>{{ end }}
        {{ if or (or (.Get "title") (.Get "caption")) (.Get "attr")}}
        <figcaption>{{ if isset .Params "title" }}
            {{ .Get "title" }}{{ end }}
            {{ if or (.Get "caption") (.Get "attr")}}<p>
            {{ .Get "caption" }}
            {{ with .Get "attrlink"}}<a href="{{.}}"> {{ end }}
                {{ .Get "attr" }}
            {{ if .Get "attrlink"}}</a> {{ end }}
            </p> {{ end }}
        </figcaption>
        {{ end }}
    </figure>
    <!-- image -->
 ### Usage
 I simply changed:
    {% image full http://farm5.staticflickr.com/4136/4829260124_57712e570a_o_d.jpg "One of my favorite touristy-type photos. I secretly waited for the good light while we were "having fun" and took this. Only regret: a stupid pole in the top-left corner of the frame I had to clumsily get rid of at post-processing." ->http://www.flickr.com/photos/alexnormand/4829260124/in/set-72157624547713078/ %}
 to this (this example uses a slightly extended version named `fig`, different than the built-in `figure`):
    {{%/* fig class="full" src="http://farm5.staticflickr.com/4136/4829260124_57712e570a_o_d.jpg" title="One of my favorite touristy-type photos. I secretly waited for the good light while we were having fun and took this. Only regret: a stupid pole in the top-left corner of the frame I had to clumsily get rid of at post-processing." link="http://www.flickr.com/photos/alexnormand/4829260124/in/set-72157624547713078/" */%}}
 As a bonus, the shortcode named parameters are, arguably, more readable.
 ## Finishing touches
 ### Fix content
 Depending on the amount of customization that was done with each post with Jekyll, this step will require more or less effort. There are no hard and fast rules here except that `hugo server --watch` is your friend. Test your changes and fix errors as needed.
 ### Clean up
 You'll want to remove the Jekyll configuration at this point. If you have anything else that isn't used, delete it.
 ## A practical example in a diff
 [Hey, it's Alex](http://heyitsalex.net/) was migrated in less than a _father-with-kids day_ from Jekyll to Hugo. You can see all the changes (and screw-ups) by looking at this [diff](https://github.com/alexandre-normand/alexandre-normand/compare/869d69435bd2665c3fbf5b5c78d4c22759d7613a...b7f6605b1265e83b4b81495423294208cc74d610).
--- a/content/projects/_index.md
+++ b/content/projects/_index.md
@ -1,11 +0,0 @@
 +++
 title = "Projects"
 date = "2020-06-01T15:11:44+05:30"
 hide_authorbox = true
 disable_comments = true
 draft = true
 weight = 2
 hide_list = false
 menu = "main"
 +++
 hmm
--- a/content/projects/chatto-a-self-hosted-e2ee-chat-application.md
+++ b/content/projects/chatto-a-self-hosted-e2ee-chat-application.md
@ -1,100 +0,0 @@
 +++
 title = "Chatto - A Self Hosted E2EE Chat Application"
 date = "2020-06-01T15:02:07+05:30"
 disable_comments = true
 draft = false
 [sidebar]
    disable = true
 categories = [
    "Projects"
 ]
 tags = [
    "java",
    "spring-boot",
    "hibernate",
    "self-hosted",
    "e2ee",
    "encryption",
    "typescript"
 ]
 [menu]
    [menu.main]
    parent = "Projects"
    name = "Chatto"
 +++
 Chatto is a self hosted, end to end encrypted chat application. 
 [Repository](https://git.arcusiridis.com/nova/Chatto)
 [Documentation](https://git.arcusiridis.com/nova/Chatto/wiki)
 ## Key Features
 1. Open Source, Self Hosted
 2. Messages are encrypted end to end using AES GCM encryption (paramters like keysize can be configured)
 3. No personal information such as names or email required
 4. Does not rely on any external services like auth services, mail servers or captcha services
 5. You are in control of your data.
 6. Backend exposes a JSON API that can be used by third party clients
 7. The chat messages support markdown
 ## Technical Features
 1. Made with Java, Spring Boot and Hibernate
 2. Front end is made with Thymeleaf templates and uses AJAX(written in TypeScript) to provide dynamic functionality
 3. All password are stored hashed using Bcrypt
 4. Uses a custom token based authentication scheme making use of Spring Security. Tokens are cached using EhCache
 5. Care has been taken to safeguard against attacks like CSRF and XSS 
   * Server side cookies are protected against CSRF using CSRF tokens
   * To protect the JSON API auth token against XSS, DomPurify is used to sanitize any user provided HTML
   * Server side DTO validation is used to sanitize user input
 ## Tech Stack
 * **Backend** - Java, Spring Boot, Hibernate, Maven
 + Database migrations using flyway
 * Caching using EhCache
 * **Frontend** - 
  + Server side templating - Thymeleaf
  + JS - TypeScript, Browserify (and plugins like tsify), Terser, Grunt, Yarn
      * Templating using Handlebars
 ## Preview
 ### Design
 + **Full layout**
    <p align="center"> ![Preview](/img/projects/chatto/chatto-preview-main.png)
    Design adapted from [bootsnip](https://bootsnipp.com/snippets/nNg98)</p>
 + **Mobile layout** <br>
    The UI uses bootstrap grid system for a fully responsive layout. This is how it might look on a mobile screen -
    <p align="center">![chatto-on-mobile](/img/projects/chatto/chatto-preview-main-2.png)</p>
 <!-- <video autoplay loop style=" width: 100%    !important;
  height: auto   !important;">
    <source type="video/mp4" src="/img/projects/chatto/chatto-preview-infinite-scroll.mkv">
    </source>
 </video> -->
 ### Infinite scroll
 {{< apvid >}}/img/projects/chatto/chatto-preview-infinite-scroll-2.webm{{< /apvid >}}
 Decryption takes place on the fly on a background thread using the web worker API for a smooth user experience.
 ### E2EE Passphrase
 {{< avid >}}/img/projects/chatto/chatto-preview-passphrase.mp4{{</ avid>}}
 Note - passphrase is not stored on the server, or anywhere other than client's memory. The app simply checks whether decryption was successful to determine whether the passphrase is correct.
 ### Markdown in chat
 {{< avid >}}/img/projects/chatto/chatto-preview-markdown.webm{{</ avid>}}
 ### User search 
 {{< apvid >}}/img/projects/chatto/chatto-preview-usersearch.webm{{< /apvid >}}
--- a/data/members/nova.toml
+++ b/data/members/nova.toml
@ -1,13 +0,0 @@
 Name = "Rohan Sircar"
 # Img = "/path/to/picture/of/michael.jpg"
 Position = "Aspiring Software Developer"
 URL = "https://arcusiridis.com"
 Bio = """
  Hi, I'm Rohan Sircar. I am an aspiring software developer. 
  I really like programming in Scala and Rust, but I can also program in Java, Kotlin and
  TypeScript. I am especially interested in Web Application Development and working with 
  Microservices."""
 [social]
   gitea = "nova"
   gitlab = "rohan-sircar"
   github = "rohan-sircar"
--- a/layouts/_default/baseof_old.html
+++ b/layouts/_default/baseof_old.html
--- a/layouts/partials/foot.html
+++ b/layouts/partials/foot.html
@ -10,8 +10,8 @@
 </style>
 {{end}}
 <!--
 {{- partial "script" (dict "Asset" "js/jquery.slim.js" "Defer" true "Root" $) -}}
 <!--
 {{- partial "script" (dict "Asset" "js/foundation.js" "Defer" true "Root" $) -}}
 -->
--- a/layouts/partials/head.html
+++ b/layouts/partials/head.html
@ -10,19 +10,18 @@
 {{ partial "matomo/head.html" . }}
-<!-- {{ partial "styles" (dict "Asset" "css/foundation.css" "Root" $) }} -->
+{{ partial "styles" (dict "Asset" "css/foundation.css" "Root" $) }}
-<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.min.js" integrity="sha256-9/aliU8dGd2tb6OSsuzixeV4y/faTqgFtohetphbbj0=" crossorigin="anonymous"></script>
+<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
-<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/foundation/6.6.3/css/foundation.min.css" integrity="sha256-ogmFxjqiTMnZhxCqVmcqTvjfe1Y/ec4WaRj/aQPvn+I=" crossorigin="anonymous" />
+<link rel="stylesheet" type="text/css" href="https://cdnjs.cloudflare.com/ajax/libs/foundation/6.5.3/css/foundation.css">
 <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/lunr.js/2.3.6/lunr.min.js" defer=""></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/lunr.js/2.3.8/lunr.min.js" integrity="sha256-34Si1Y6llMBKM3G0jQILVeoQKEwuxjbk4zGWXXMT4ps=" crossorigin="anonymous"></script>
+<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/foundation/6.4.2/js/foundation.min.js"></script>
 <link rel="stylesheet" type="text/css" href="https://cdnjs.cloudflare.com/ajax/libs/fork-awesome/1.1.7/css/fork-awesome.css">
 <script src="https://cdnjs.cloudflare.com/ajax/libs/foundation/6.6.3/js/foundation.min.js" integrity="sha256-pRF3zifJRA9jXGv++b06qwtSqX1byFQOLjqa2PTEb2o=" crossorigin="anonymous"></script>
 <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/fork-awesome/1.1.7/css/fork-awesome.min.css" integrity="sha256-gsmEoJAws/Kd3CjuOQzLie5Q3yshhvmo7YNtBG7aaEY=" crossorigin="anonymous" />
--- a/layouts/partials/list_item.html
+++ b/layouts/partials/list_item.html
@ -1,64 +0,0 @@
 <article itemprop="blogPosts" itemscope itemtype="http://schema.org/BlogPosting">
    {{- if .Page.Params.thumbnail -}}
    <div>
        <figure>
            <a href="{{ .Permalink }}">
                <img src="{{ partial "make_link" (dict "URL" .Page.Params.thumbnail "Root" $.Root) }}" alt="{{ .Title }}" />
            </a>
        </figure>
    </div>
    {{- end -}}
    <div>
        <header class="post-list-title">
            <a href="{{ partial "make_link" (dict "URL" .Page.RelPermalink "Root" $.Root) }}">
                <h2 itemprop="headline">{{ .Page.Title }}</h2>
            </a>
            <div class="metadata">
                {{- if not .Page.Date.IsZero -}}
                <div>
                <span class="far fa-clock" aria-hidden></span>
                <span class="sr-text">{{ i18n "publishedLabel" | title }}: </span>
                <time datetime="{{ .Date.Format "2006-01-02" }}" itemprop="datePublished">{{ .Page.Date.Format "January 02, 2006" }}</time>
                </div>
                {{- end -}}
                {{- if $.Root.Site.Data.members -}}
                    {{- if gt (len $.Root.Site.Data.members) 1 -}}
                        {{- $author := $.Root.Site.Params.author -}}
                        {{- with $.Page.Params.author -}}
                            {{- /* Verify author actually exists */ -}}
                            {{- $.Scratch.Set "member" "" -}}
                            {{- partial "get_member" (dict "Members" $.Root.Site.Data.members "Name" . "Scratch" $.Root.Scratch) -}}
                            {{- $author = ($.Root.Scratch.Get "member").Name -}}
                        {{- end -}}
                        {{- with $author -}}
                        <div>
                            <span class="fas fa-user" aria-hidden></span>
                            By: <span itemprop="author">{{ . }}</span>
                        </div>
                        {{- end -}}
                    {{- end -}}
                {{- end -}}
            </div>
        </header>
        {{- with .Page.Params.featured_image }}<img src="{{ . }}" style="border-radius: 50px;  padding: 20px;" >{{- end -}}
        <!-- <img{{ with .Page.Params.featured_image }} src="{{ . }}"{{ end }} alt="{{ .Page.Title }}" > -->
        <div class="post-list-summary" itemprop="description">
            <!-- style="border-radius: 50px;  padding: 20px; " -->
            <p>
                {{- with .Page.Description -}}
                    {{ . | plainify | htmlUnescape | replaceRE "(?m)(\\s+)" " " }}
                    <a href="{{ partial "make_link" (dict "URL" $.Page.RelPermalink "Root" $.Root) }}">
                        [{{ i18n "readMore" ($.Page.Title | title) | safeHTML }}...]
                    </a>
                {{- else -}}
                    {{ .Page.Summary | plainify | htmlUnescape | replaceRE "(?m)(\\s+)" " " }}
                    {{ if .Page.Truncated }}
                        <a href="{{ partial "make_link" (dict "URL" $.Page.RelPermalink "Root" $.Root) }}">
                            [{{ i18n "readMore" ($.Page.Title | title) | safeHTML }}...]
                        </a>
                    {{ end }}
                {{- end -}}
            </p>
        </div>
    </div>
 </article>
--- a/layouts/shortcodes/apvid.html
+++ b/layouts/shortcodes/apvid.html
@ -1,14 +0,0 @@
 <p align="center">
    <video autoPlay muted loop class="apvid">
        <source type="video/mp4" src="{{- .Inner -}}" />
    </video>
 </p>
 <style>
    @media only screen and (max-width: 600px) {
        .apvid {
            width: 100% !important;
            height: auto !important;
        }
    }
 </style>
--- a/layouts/shortcodes/avid.html
+++ b/layouts/shortcodes/avid.html
@ -1,4 +0,0 @@
 <video autoPlay muted loop style=" width: 100%    !important; height: auto   !important;">
    <source type="video/mp4" src="{{- .Inner -}}" />
 </video>
--- a/static/img/chatto.webp
+++ b/static/img/chatto.webp
--- a/static/img/decisiontree.webp
+++ b/static/img/decisiontree.webp
--- a/static/img/decisiontree_old.png
+++ b/static/img/decisiontree_old.png
--- a/static/img/dsl-based-sql-libraries.webp
+++ b/static/img/dsl-based-sql-libraries.webp
--- a/static/img/dtcover.webp
+++ b/static/img/dtcover.webp
--- a/static/img/projects/chatto/chatto-preview-infinite-scroll-2.mkv
+++ b/static/img/projects/chatto/chatto-preview-infinite-scroll-2.mkv
--- a/static/img/projects/chatto/chatto-preview-infinite-scroll-2.webm
+++ b/static/img/projects/chatto/chatto-preview-infinite-scroll-2.webm
--- a/static/img/projects/chatto/chatto-preview-main-2.png
+++ b/static/img/projects/chatto/chatto-preview-main-2.png
--- a/static/img/projects/chatto/chatto-preview-main.png
+++ b/static/img/projects/chatto/chatto-preview-main.png
--- a/static/img/projects/chatto/chatto-preview-markdown.webm
+++ b/static/img/projects/chatto/chatto-preview-markdown.webm
--- a/static/img/projects/chatto/chatto-preview-passphrase.mp4
+++ b/static/img/projects/chatto/chatto-preview-passphrase.mp4
--- a/static/img/projects/chatto/chatto-preview-usersearch.webm
+++ b/static/img/projects/chatto/chatto-preview-usersearch.webm
--- a/static/img/sysarch.webp
+++ b/static/img/sysarch.webp