Working on Adding Subcatchments

src/Droplet.Core.Inp/Data/IInpDatabase.cs

@@ -23,6 +23,13 @@ public interface IInpDatabase
         /// <param name="id">The id of the object</param>
         IInpDbObject GetObject(Guid id);
 
+        /// <summary>
+        /// Get all <see cref="IInpEntity"/> from the database as an <see cref="IEnumerable{T}"/>
+        /// </summary>
+        /// <typeparam name="T">The <see cref="IInpEntity"/> type that will be returned</typeparam>
+        /// <returns>Returns: An enumeration of all entities in the database</returns>
+        IEnumerable<T> GetEntities<T>() where T :IInpEntity;
+
         /// <summary>
         /// Get an option of the type <typeparamref name="T"/> from the database
         /// Note that the <typeparamref name="T"/> must be a derived type of the
@@ -56,6 +63,14 @@ public interface IInpDatabase
         /// <returns>Returns the entities from the database</returns>
         IEnumerable<IInpEntity> GetAllEntities();
 
+        /// <summary>
+        /// Get an <see cref="IInpEntity"/> from its <see cref="IInpEntity.Name"/>
+        /// </summary>
+        /// <typeparam name="T">The type of the entity</typeparam>
+        /// <param name="name">The name of the entity</param>
+        /// <returns>Returns: An entity that matches the name provided</returns>
+        T? GetEntity<T>(string name) where T : class, IInpEntity;
+
         /// <summary>
         /// Get the strings from the database that can be written to
         /// an inp file

src/Droplet.Core.Inp/Data/InpDatabase.cs

@@ -91,6 +91,35 @@ public IInpDbObject GetObject(Guid id)
             return _objectDictionary[id];
         }
 
+        /// <summary>
+        /// Get all entities from the database that match the type <typeparamref name="T"/>. This method 
+        /// will return an <see cref="IEnumerable{T}"/> that can be iterated over or turned into a list.
+        /// </summary>
+        /// <typeparam name="T">The type that will be returned</typeparam>
+        /// <returns>Returns: An <see cref="IEnumerable{T}"/> where all members will match the type <typeparamref name="T"/></returns>
+        public IEnumerable<T> GetEntities<T>() where T : IInpEntity
+        {
+            foreach (var entry in _objectDictionary)
+                if (entry.Value is T e)
+                    yield return e;
+        }
+
+        /// <summary>
+        /// Get an entity from the database which <see cref="IInpEntity.Name"/> matches 
+        /// the <paramref name="name"/> provided
+        /// </summary>
+        /// <typeparam name="T">The type of the entity that will be returned</typeparam>
+        /// <param name="name">The name of the entity that we are looking for</param>
+        /// <returns>Returns: An entity of the type <typeparamref name="T"/> whos name matches <paramref name="name"/></returns>
+        public T? GetEntity<T>(string name) where T : class, IInpEntity
+        {
+            foreach(var entry in _objectDictionary.Values)
+                if (entry is T entity && entity.Name == name)
+                    return entity;
+
+            return default;
+        }
+
         /// <summary>
         /// Return an option from the database given the <see cref="InpOption"/> derived
         /// type. Note that if there are no objects that match the type of <typeparamref name="T"/>
@@ -213,13 +242,24 @@ public void UpdateDatabase(List<IInpTable> tables)
 
         /// <summary>
         /// Remove any items from the dictionary that contain
-        /// NULL in their names
+        /// NULL in their names. Also, this method will remove all <see cref="InpEntityData"/> 
+        /// objects from the dictionary
         /// </summary>
         public void Purge()
         {
             foreach(var item in _objectDictionary.Values)
+            {
                 if (item is IInpEntity entity && entity.Name == "<NULL>")
+                {
                     _objectDictionary.Remove(entity.ID);
+                }
+                else if (item is InpEntityData entityData)
+                {
+                    _objectDictionary.Remove(entityData.ID);
+                }
+            }
+
+
         }
 
         #endregion

src/Droplet.Core.Inp/Data/InpTableRow.cs

@@ -74,6 +74,10 @@ string IInpTableRow.this[int index]
         {
             InpOption.HeaderName => InpOption.CreateFromOptionName(Key, this, database),
 
+            Subcatchment.InpName => new Subcatchment(this, database),
+
+            SubArea.InpName => new SubArea(this, database),
+
             // TODO: Add exception here
             _                    => new InpEntity()
         };

src/Droplet.Core.Inp/Entities/IEntityDataHost.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Droplet.Core.Inp.Entities
+{
+    /// <summary>
+    /// Interface that defines a class that will host entity data
+    /// </summary>
+    public interface IEntityDataHost<T> where T : class
+    {
+        /// <summary>
+        /// Add entity data to it's host
+        /// </summary>
+        /// <param name="entityData">The data that will be added to this host</param>
+        void AddEntityData(T entityData);
+    }
+}

src/Droplet.Core.Inp/Entities/INode.cs

@@ -0,0 +1,23 @@
+namespace Droplet.Core.Inp.Entities
+{
+    /// <summary>
+    /// Interface that defines the X, Y and Z coordinates for a node
+    /// </summary>
+    public interface INode
+    {
+        /// <summary>
+        /// The X coordinate of the node
+        /// </summary>
+        double X { get; }
+
+        /// <summary>
+        /// The Y coordinate of the node
+        /// </summary>
+        double Y { get; }
+
+        /// <summary>
+        /// The Z coordinate of the node
+        /// </summary>
+        double Z { get; }
+    }
+}

src/Droplet.Core.Inp/Entities/InpEntity.cs

@@ -55,7 +55,7 @@ public InpEntity(IInpTableRow row, IInpDatabase database) : this()
         /// <summary>
         /// The name of the entity
         /// </summary>
-        public virtual string Name { get; protected set; }
+        public virtual string Name { get; set; }
 
         /// <summary>
         /// The description of the entity
@@ -111,5 +111,9 @@ protected string GetInpDescriptionString()
         }
 
         #endregion
+
+        #region Internal Methods
+
+        #endregion
     }
 }

src/Droplet.Core.Inp/Entities/InpEntityData.cs

@@ -0,0 +1,76 @@
+using Droplet.Core.Inp.Data;
+using Droplet.Core.Inp.Utilities;
+using System;
+using System.Globalization;
+
+namespace Droplet.Core.Inp.Entities
+{
+    /// <summary>
+    /// Class that represents added data to an entity. For example the sub-area entity is added 
+    /// data to the subcatchment entity.
+    /// </summary>
+    abstract public class InpEntityData : IInpEntity
+    {
+        /// <summary>
+        /// Default Constructor
+        /// </summary>
+        public InpEntityData()
+        {
+            ID = Guid.NewGuid();
+            var resources = new InpResourceManager();
+            Name = Description = Tag = resources.GetString("DefaultProperty", CultureInfo.CurrentCulture);
+        }
+
+        /// <summary>
+        /// Internal constructor that accepts a <see cref="IInpTableRow"/> and an <see cref="IInpDatabase"/> 
+        /// that will be used to construct the data and set the database for this entity. This constructor sets 
+        /// the <see cref="Name"/> as the first element in the row and creates a <see cref="Guid.NewGuid"/> for its 
+        /// <see cref="ID"/>.
+        /// </summary>
+        /// <param name="row">The row that will be used to construct this entity data</param>
+        /// <param name="database">The database that this entity belongs to</param>
+        internal InpEntityData(IInpTableRow row, IInpDatabase database)
+        {
+            _ = row ?? throw new ArgumentNullException(nameof(row));
+            _ = database ?? throw new ArgumentNullException(nameof(database));
+
+            var resources = new InpResourceManager();
+
+            Name = row[0];
+            Database = database;
+            ID = Guid.NewGuid();
+            Description = Tag = resources.GetString("DefaultProperty", CultureInfo.CurrentCulture);
+        }
+
+        /// <summary>
+        /// The name of the reference Entity
+        /// </summary>
+        public string Name { get; }
+
+        /// <summary>
+        /// The optional Description for the entity
+        /// </summary>
+        public string Description { get; }
+
+        /// <summary>
+        /// The optional Tag for the entity
+        /// </summary>
+        public string Tag { get; }
+
+        /// <summary>
+        /// The database Guid for the entity
+        /// </summary>
+        public Guid ID { get; }
+
+        /// <summary>
+        /// The database that the entity belongs to
+        /// </summary>
+        public IInpDatabase? Database { get; }
+
+        /// <summary>
+        /// Abstract method that converts this entity to an inp string
+        /// </summary>
+        /// <returns>Returns: A formatted inp string</returns>
+        public abstract string ToInpString();
+    }
+}