added Prompt Builder

src/main/java/io/github/amithkoujalgi/ollama4j/core/types/OllamaModelType.java

@@ -21,6 +21,7 @@ public class OllamaModelType {
   public static final String VICUNA = "vicuna";
   public static final String WIZARD_VICUNA_UNCENSORED = "wizard-vicuna-uncensored";
   public static final String PHIND_CODELLAMA = "phind-codellama";
+  public static final String PHI = "phi";
   public static final String ZEPHYR = "zephyr";
   public static final String WIZARDCODER = "wizardcoder";
   public static final String MISTRAL_OPENORCA = "mistral-openorca";

src/main/java/io/github/amithkoujalgi/ollama4j/core/utils/PromptBuilder.java

@@ -0,0 +1,69 @@
+package io.github.amithkoujalgi.ollama4j.core.utils;
+
+/**
+ * The {@code PromptBuilder} class is used to construct prompt texts for language models (LLMs). It
+ * provides methods for adding text, adding lines, adding separators, and building the final prompt.
+ *
+ * <p>Example usage:
+ *
+ * <pre>{@code
+ * PromptBuilder promptBuilder = new PromptBuilder();
+ * promptBuilder.add("This is a sample prompt for language models.")
+ *              .addLine("You can add lines to provide context.")
+ *              .addSeparator()
+ *              .add("Feel free to customize as needed.");
+ * String finalPrompt = promptBuilder.build();
+ * System.out.println(finalPrompt);
+ * }</pre>
+ */
+public class PromptBuilder {
+
+  private final StringBuilder prompt;
+
+  /** Constructs a new {@code PromptBuilder} with an empty prompt. */
+  public PromptBuilder() {
+    this.prompt = new StringBuilder();
+  }
+
+  /**
+   * Appends the specified text to the prompt.
+   *
+   * @param text the text to be added to the prompt
+   * @return a reference to this {@code PromptBuilder} instance for method chaining
+   */
+  public PromptBuilder add(String text) {
+    prompt.append(text);
+    return this;
+  }
+
+  /**
+   * Appends the specified text followed by a newline character to the prompt.
+   *
+   * @param text the text to be added as a line to the prompt
+   * @return a reference to this {@code PromptBuilder} instance for method chaining
+   */
+  public PromptBuilder addLine(String text) {
+    prompt.append(text).append("\n");
+    return this;
+  }
+
+  /**
+   * Appends a separator line to the prompt. The separator is a newline followed by a line of
+   * dashes.
+   *
+   * @return a reference to this {@code PromptBuilder} instance for method chaining
+   */
+  public PromptBuilder addSeparator() {
+    prompt.append("\n--------------------------------------------------\n");
+    return this;
+  }
+
+  /**
+   * Builds and returns the final prompt as a string.
+   *
+   * @return the final prompt as a string
+   */
+  public String build() {
+    return prompt.toString();
+  }
+}