[CS2113-T16-3] Command Line Paper Trading

.gitignore

@@ -15,3 +15,5 @@ bin/
 
 /text-ui-test/ACTUAL.txt
 text-ui-test/EXPECTED-UNIX.TXT
+
+data/*.ser

_config.yml

@@ -0,0 +1 @@
+theme: jekyll-theme-midnight

build.gradle

@@ -7,11 +7,15 @@ plugins {
 
 repositories {
     mavenCentral()
+    maven {
+        url  "https://dl.bintray.com/patriques82/maven"
+    }
 }
 
 dependencies {
     testImplementation group: 'org.junit.jupiter', name: 'junit-jupiter-api', version: '5.5.0'
     testRuntimeOnly group: 'org.junit.jupiter', name: 'junit-jupiter-engine', version: '5.5.0'
+    compile 'org.patriques:alphavantage4j:1.4'
 }
 
 test {
@@ -29,18 +33,19 @@ test {
 }
 
 application {
-    mainClassName = "seedu.duke.Duke"
+    mainClassName = "seedu.duke.PaperTrade"
 }
 
 shadowJar {
-    archiveBaseName = "duke"
+    archiveBaseName = "paperTrade"
     archiveClassifier = null
 }
 
 checkstyle {
     toolVersion = '8.23'
 }
 
-run{
+run {
     standardInput = System.in
+    enableAssertions = true
 }

docs/AboutUs.md

@@ -1,9 +1,9 @@
-# About us
+# About us(in-progress)
 
 Display | Name | Github Profile | Portfolio 
 --------|:----:|:--------------:|:---------:
-![](https://via.placeholder.com/100.png?text=Photo) | John Doe | [Github](https://github.com/) | [Portfolio](docs/team/johndoe.md)
-![](https://via.placeholder.com/100.png?text=Photo) | Don Joe | [Github](https://github.com/) | [Portfolio](docs/team/johndoe.md)
-![](https://via.placeholder.com/100.png?text=Photo) | Ron John | [Github](https://github.com/) | [Portfolio](docs/team/johndoe.md)
-![](https://via.placeholder.com/100.png?text=Photo) | John Roe | [Github](https://github.com/) | [Portfolio](docs/team/johndoe.md)
-![](https://via.placeholder.com/100.png?text=Photo) | Don Roe | [Github](https://github.com/) | [Portfolio](docs/team/johndoe.md)
+![](https://via.placeholder.com/100.png?text=Photo) | Alvin | [Github](https://github.com/trolommonm) | [Portfolio](docs/team/alvin.md)
+![](https://via.placeholder.com/100.png?text=Photo) | Yoke Min | [Github](https://github.com/yokemin) | [Portfolio](docs/team/yokemin.md)
+![](https://via.placeholder.com/100.png?text=Photo) | Liang Yi | [Github](https://github.com/wly99) | [Portfolio](docs/team/liangyi.md)
+![](https://via.placeholder.com/100.png?text=Photo) | Jun Xian | [Github](https://github.com/JunxianAng) | [Portfolio](docs/team/junxian.md)
+![](https://via.placeholder.com/100.png?text=Photo) | Shao Jing | [Github](https://github.com/shaojingle) | [Portfolio](docs/team/shaojing.md)

docs/DeveloperGuide.md

@@ -1,29 +1,215 @@
 # Developer Guide
+It is recommended that you read through the user guide to familiarize yourself with the program before using the 
+developer guide.
+
+# Setting up PaperTrade
+Fork the repository and clone the fork into your computer.
+
+To set up the project:
+1. Ensure that you have JDK 11 installed.
+2. Import the project as a Gradle project.
+3. To build the project, run "./gradlew build" on a Unix machine or run "gradlew build" on Windows.
 
 ## Design & implementation
 
-{Describe the design and implementation of the product. Use UML diagrams and short code snippets where applicable.}
+### Architecture
+
+![](./diagrams/Packages.png)
+
+The Package Diagram above gives a high level view of the project structure and the classes in each package. 
+
+![](./diagrams/Architecture.png)
+
+The Architecture Diagram above gives a high level design of PaperTrade. Below is a quick overview of each component.
+
+### Overview
+
+* `PaperTrade`: The main entry point into the program. It initializes the Controller object which then takes over the 
+execution of the program.
+* `Controller`: Acts as an interface between all the other classes, to process all the business logic incoming commands
+from the user. Manipulates the data through `PortfolioManager` and interact with `Ui` to display information to the 
+user.
+* `PortfolioManager`: Responsible for managing the persistency of the user's data through the `Storage` class and holds 
+all the data for the program at a point in time.
+* `Ui`: Responsible for displaying information to the user and getting input from the user.
+* `Parser`: Responsible for parsing the user input and returning a `Command` object corresponding to the user command 
+requested.
+* `StockPriceFetcher`: Responsible for calling the AlphaVantage API to retrieve stock information.
+* `Storage`: Responsible for managing the storing of data for persistency.
+
+### Lifecycle of PaperTrade
+The sequence diagram below shows how different packages and classes interact with each other throughout the lifecycle 
+of PaperTrade.
+
+![](./diagrams/Lifecycle.png)
+
+## Implementation
+
+### Buy/Sell Stock Feature
+
+#### Current implementation
+
+Buy and sell stock commands are largely similar, with the only difference being the way values of attributes in 
+the objects instantiated are updated and the condition for throwing exceptions. 
+Other than that, the way the functions work is the same.
+
+Below is the explanation of the implementation of based on buy stock command, 
+which can be applied to the sell stock command as well.
+
+Given below is an example usage scenario and how buy stock command behaves at each step.
+
+![](./diagrams/BuyStockState0.png)
+
+**Step 1** : The user calls the buy stock command from the `Parser`. 
+Buy stock command is instantiated by `Parser`, which calls the `buyParse` method to get the attribute values 
+for `symbol` and `quantity` required to instantiate `buyCommand`. The `Controller` instantiates `Ui`, `PortfolioManager`
+and `StockPriceFetcher`, which gets the `price` of stock. 
+In the `Controller`, we check for the instance of `buyCommand` object and calls the `buyStock` method.
+
+Below is a table of what each parameter corresponds to in the state diagram of the program.
+
+|Parameter|Corresponds to
+|:---:|:---:
+|`symbol`| Ticker symbol of Stock to buy
+|`quantity`| Integer number of shares to be 
+|`price`| Price of stock at current time 
+
+**Step 2** : `buyStock()` is called from the `PortfolioManager` with the values of `symbol` and `quantity` 
+and `price` passed to them. 
+
+**Step 3** : `Portfolio` is instantiated and its `buyStock` method is called as well. 
+
+ ![](./diagrams/BuyStockState1.png)
+
+
+**Step 4** : `Wallet` and `Stock` are instantiated. 
+It then checks if there is sufficient fund in the wallet. If so, `buyStock` method is called from the `wallet` instance.
+Then, new `Transaction` object is instantiated. 
+The `transaction` object stores details of the stock bought.
+Below is a table of what each attribute in `Transaction` corresponds to in the program.
+
+|Attribute|Corresponds to
+|:---:|:---:
+|`TransactionType`| Buy or Sell stock
+|`Quantity`| Integer number of shares to be bought
+|`BuyPrice`| Cost price of a stock at a specific time 
+|`LocalDateTime`| the time when the command is called 
+
+**Step 5** : Following that, _if a stock with the same symbol has not been instantiated before_, 
+a new 'Stock' object is also instantiated. Otherwise, the `Stock` object of that stock symbol will be used. 
+
+The method `addTransaction` in the `stock` object is then called, with the `transaction` object as a parameter, 
+to update the value of the attribute `totalQuantity` in `Stock`.
+
+![](./diagrams/BuyStockState2.png)
+
+**Step 6** : `Portfolio`, `Wallet`, `Transaction` and `Stock` are terminated first.
+The `save` method is then called. 
+
+**Step 7**: `Controller` then calls the relevant methods from `Ui` to print the information about the stock bought and 
+the amount left in the wallet. `StockPriceFetcher`, `Ui` and `PortfolioManager` are then terminated.
+
+![](./diagrams/BuyStockState3.png)
+
+The following sequence diagram summarizes what happens when the user executes an `BuyCommand` :
+
+![](./diagrams/BuyStockSequence.png)
+
+#### Design consideration
+
+The following explains the design considerations when implementing commands:
+
+* Make `BuyCommand` As a class by itself
+    * Reason: Increases modularity of code, higher overall code quality 
+* Alternatives: have a `buyCommand` method, increases coupling and reduces testability
+
+### View Portfolio feature
+
+#### Current implementation
+
+View portfolio command is executed by `Controller`. It allows users to access, retrieve and view array list of stocks 
+owned and their historical transactions. This is done by instantiating a new `PortfolioManager` which is able to 
+access `Portfolio`. The `Portfolio` object encapsulates `Stock` and `Transaction`.
+
+Addtionally, `Stock` object is able to retrieve latest live prices by instantiating `StockPriceFetcher` to call 
+AlphaVantage API. This allows users to view not only their stocks historial transactions, but to see their profit/loss  
+based on current latest price. 
+
+Given below is an example usage scenario and how view portfolio command behaves at each step.
+
+![](./diagrams/ViewPortfolioState0.png)
+
+**Step 1**: `Parser` will initialise `ViewCommand` and call `viewPortfolio()` command from the `Controller`. `Ui` is initialised to call `view()`. The method 
+takes in an parameter of an array list of stock to be displayed.
+
+|Parameter|Corresponds to
+|:---:|:---:
+|`Stock`| Stock objects
+
+**Step 2**: To obtain an array list of stock to be used as an arugment in `Ui` `view()` method, `PortfolioManager` is initialised to call `getAllStocks()` method.
+The method returns an array list of `Stock` by initialising `Portfolio` which is keeps a HashMap of `Stock` objects. Below is a table of what each attribute in
+`Stock`corresponds to in the program.
+
+|Attribute|Corresponds to
+|:---:|:---:
+|`Symbol`| Ticker Symbol of Stock in possession
+|`totalQuantity`| Integer number of shares currently owned
+|`transactions`| An array list of `Transaction` object 
+
+![](./diagrams/ViewPortfolioState1.png)
+
+**Step 3**: For each of the `Stock` object to be displayed, `getTransaction()` method is called to obtained historial
+records of user's stock transactions.
+Below is a table of what each attribute in `Transaction` corresponds to in the program. 
+
+|Attribute|Corresponds to
+|:---:|:---:
+|`TransactionType`| Buy or Sell stock
+|`Quantity`| Integer number of shares to be bought
+|`BuyPrice`| Cost price of a stock at a specific time 
+|`LocalDateTime`| the time when the command is called 
+
+**Step 4**: For each of the `Stock` object to be displayed, `getLatestPrice()` method is called by instantiating a new `StockPriceFetcher`
+which calls out to AlphaVantage API to obtain latest stock price. 
+
+User's latest profit/loss will be displayed through calculation of latest stock price
+against historical buy price. 
+
+![](./diagrams/ViewPortfolioState2.png)
+
+**Step 5**: `Parser`, `ViewCommand`, `Stock`, `Transaction`, `StockPriceFetcher` are terminated. 
 
 
 ## Product scope
 ### Target user profile
 
-{Describe the target user profile}
+We are targeting people below 25 who have never traded stocks before.
 
 ### Value proposition
 
 {Describe the value proposition: what problem does it solve?}
+Paper trading allows inexperienced people to get a feel of what trading feels like so that they can used to it without the downside of losing real money.
 
 ## User Stories
 
-|Version| As a ... | I want to ... | So that I can ...|
+|Version| As a/an ... | I want to ... | So that I can ...|
 |--------|----------|---------------|------------------|
-|v1.0|new user|see usage instructions|refer to them when I forget how to use the application|
-|v2.0|user|find a to-do item by name|locate a to-do without having to go through the entire list|
+|v1.0|new investor|see usage instructions|refer to them when I forget how to use the application|
+|v1.0|new investor|trade without putting my money at risk|learn from my mistakes and experience without losing money|
+|v1.0|investor|search for stocks I can buy|have more information to make a more informed decision|
+|v1.0|investor|buy stocks|profit from any capital gains or dividends|
+|v1.0|investor|sell stocks|realise my gains or reallocate my money to other stocks|
+|v1.0|investor|view my portfolio|see what stocks I have and my past transactions|
+|v2.0|investor|keep track of what stocks I have bought or sold|see how much money I've made or lost|
+|v2.0|investor|see how much cash I have left|decide how much to buy or sell|
+|v2.0|investor|have a watchlist of stocks|track the price movements of individual stocks|
+|v2.1|investor|see the performance of my portfolio|see if I'm on track for my financial goals|
 
 ## Non-Functional Requirements
 
 {Give non-functional requirements}
+1. Program should not take more than 5s to run for every command.
+2. Program should give some loading indicator when fetching stock prices from API calls.
 
 ## Glossary
 

docs/README.md

@@ -1,8 +1,8 @@
 # Duke
 
-{Give product intro here}
+{Paper trading command line app}
 
 Useful links:
-* [User Guide](UserGuide.md)
-* [Developer Guide](DeveloperGuide.md)
-* [About Us](AboutUs.md)
+* [User Guide](UserGuide.md)(Read more about how to use our application!)
+* [Developer Guide](DeveloperGuide.md)(Good to read for devs working on our app!)
+* [About Us](AboutUs.md)(The awesome team behind this!)

docs/UML/Architecture.puml

@@ -0,0 +1,16 @@
+@startuml
+rectangle PaperTrade
+rectangle Controller
+rectangle Ui
+rectangle PortfolioManager
+rectangle Parser
+rectangle StockPriceFetcher
+rectangle Storage
+
+PaperTrade --> Controller
+Controller --> Ui
+Controller --> PortfolioManager
+PortfolioManager --> Storage
+Controller --> Parser
+Controller --> StockPriceFetcher
+@enduml

docs/UML/BuyStockSequence.puml

@@ -0,0 +1,72 @@
+@startuml
+participant ":Controller" as Controller
+participant ":StockPriceFetcher" as StockPriceFetcher
+participant ":PortfolioManager" as PortfolioManager
+participant ":Portfolio" as Portfolio
+participant ":Wallet" as Wallet
+participant ":Transaction" as Transaction
+participant ":Stock" as Stock
+
+
+[-> Controller : buyStock(symbol, quantity)
+activate Controller
+
+
+Controller -> StockPriceFetcher : fetchLatestPrice(symbol)
+activate StockPriceFetcher
+
+StockPriceFetcher --> Controller : price
+deactivate StockPriceFetcher
+
+
+Controller -> PortfolioManager : buyStock(symbol, quantity, price)
+activate PortfolioManager
+
+PortfolioManager -> Portfolio : buyStock(symbol, quantity, price)
+activate Portfolio
+
+Portfolio -> Wallet : buyStock(quantity, price)
+activate Wallet
+
+Wallet --> Portfolio :
+deactivate Wallet
+
+create Transaction
+Portfolio -> Transaction : new Transaction(quantity, price, time)
+activate Transaction
+
+Transaction --> Portfolio : transaction
+deactivate Transaction
+
+
+alt stock not in portfolio
+    create Stock
+    Portfolio -> Stock : new Stock(symbol)
+    activate Stock
+    Stock --> Portfolio
+    deactivate Stock
+    Portfolio -> Stock : addTransaction(transaction)
+    activate Stock
+    Stock --> Portfolio :
+    deactivate Stock
+
+else stock already exist in portfolio
+    Portfolio -> Stock : addTransaction(transaction)
+    activate Stock
+    Stock --> Portfolio :
+    deactivate Stock
+
+end
+
+Portfolio --> PortfolioManager :
+deactivate Portfolio
+
+PortfolioManager -> PortfolioManager : save()
+
+PortfolioManager --> Controller :
+deactivate PortfolioManager
+
+[<--Controller
+deactivate Controller
+
+@enduml