### Install Dependencies and Serve Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/05-configuration.md Install project dependencies and start the development server. Navigate to http://localhost:4200 to view the application. ```bash npm install ng serve # Navigate to http://localhost:4200 ``` -------------------------------- ### Install Dependencies and Start Development Server Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/06-usage-examples.md Use these npm commands to install project dependencies and start the development server. Navigate to http://localhost:4200 in your browser to view the application. ```bash npm install npm start ``` -------------------------------- ### Install Dependencies Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/00-api-index.md Use this command to install all necessary project dependencies. ```bash npm install ``` -------------------------------- ### Start Development Server Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/00-api-index.md Starts the development server on port 4200 for local development and testing. ```bash npm start ``` -------------------------------- ### Install Project Dependencies Source: https://github.com/google-gemini/journal-with-gemini/blob/main/README.md This command installs the necessary Node.js dependencies for the project. It should be run after cloning the repository. ```bash $ npm install ``` -------------------------------- ### Example Usage of Entry Interface Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/03-types.md Demonstrates how to create an instance of the Entry interface. Ensure the date is in ISO 8601 format. ```typescript const entry: Entry = { date: "2024-04-01", entry: "This AI project is way over my head..." } ``` -------------------------------- ### EntryComponent Usage Example Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/08-module-exports.md Shows how to import and use the EntryComponent in other Angular modules. It includes the necessary imports and a template example. ```typescript import { EntryComponent } from './entry.component' import { Entry } from './entry.component' // Rendered in JournalComponent: // ``` -------------------------------- ### Example Deployment Commands Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/06-usage-examples.md These commands demonstrate how to deploy the production build (`dist/` folder) to various static hosting platforms. No backend is required, but users must enter their API key at runtime. ```bash # Firebase firebase deploy --only hosting ``` ```bash # Vercel vercel deploy dist/ ``` ```bash # Netlify netlify deploy --prod --dir=dist/ ``` -------------------------------- ### Bootstrap Angular Application Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/08-module-exports.md Initializes and starts the Angular application using the bootstrapApplication function. It catches and logs any errors during the startup process. ```typescript bootstrapApplication(AppComponent, appConfig) .catch((err) => console.error(err)) ``` -------------------------------- ### Re-Export Hierarchy Example Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/08-module-exports.md Illustrates the import and re-export flow in an Angular application using standalone components, starting from the main entry point to nested components and interfaces. ```plaintext main.ts ├─ imports AppComponent │ └─ imports JournalComponent │ └─ imports EntryComponent │ └─ references Entry interface └─ imports appConfig Journal Data Flow: JournalComponent ├─ injects JournalEntries service └─ passes entries to EntryComponent via [entry] binding ``` -------------------------------- ### Example Output of Journal Entry Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/06-usage-examples.md Illustrates the expected output format for a single journal entry, showing the date followed by the entry text. ```text 2024-04-01 This AI project is way over my head. I barely understand the terms they're... ``` -------------------------------- ### Run Tests with Karma and Jasmine Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/09-implementation-notes.md This command executes the test suite using Karma as the test runner and Jasmine as the testing framework. Ensure you have npm installed. ```bash npm test # Runs via Karma + Jasmine ``` -------------------------------- ### JournalEntries Service Usage Example Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/08-module-exports.md Demonstrates how to import and use the JournalEntries service within an Angular component via dependency injection. ```typescript import { JournalEntries } from './journal-entries' // In component (via dependency injection): journalEntries = inject(JournalEntries) const entries = journalEntries.getEntries("short") ``` -------------------------------- ### JournalComponent Usage Example Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/08-module-exports.md Illustrates how to import and use the JournalComponent in another Angular component. Ensure the necessary inputs like api_key and selected_journal are provided. ```typescript import { JournalComponent } from './journal.component' // Imported by AppComponent // Rendered via: ``` -------------------------------- ### Angular Application Bootstrap Configuration Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/05-configuration.md Defines the root-level providers for the Angular application. This example shows an empty provider array, indicating no custom services are injected at the application bootstrap level. The configuration is passed to `bootstrapApplication` in `src/main.ts`. ```typescript import { ApplicationConfig } from '@angular/core' export const appConfig: ApplicationConfig = { providers: [] } ``` ```typescript bootstrapApplication(AppComponent, appConfig) .catch((err) => console.error(err)) ``` -------------------------------- ### Package.json Scripts for Angular CLI Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/05-configuration.md Defines common scripts for managing the Angular project, including starting the development server, building the application, watching for changes during development, and running tests. These scripts leverage the Angular CLI. ```json { "start": "ng serve", "build": "ng build", "watch": "ng build --watch --configuration development", "test": "ng test" } ``` -------------------------------- ### Basic Gemini API Request Source: https://github.com/google-gemini/journal-with-gemini/blob/main/README.md This snippet demonstrates how to send a basic API request to the Gemini API using the JavaScript SDK. Ensure you have installed the necessary dependencies and replaced 'GEMINI_API_KEY' with your actual API key. ```javascript const { GoogleGenerativeAI } = require("@google/generative-ai"); const genAI = new GoogleGenerativeAI("GEMINI_API_KEY"); const model = genAI.getGenerativeModel({ model: "gemini-1.5-flash" }); const prompt = "Explain how AI works"; const result = await model.generateContent(prompt); console.log(result.response.text()); ``` -------------------------------- ### Setting Valid Answer State Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/04-errors.md TypeScript examples demonstrating how to set the `valid_answer` boolean property to indicate whether the Gemini response is valid or an error. ```typescript // Success: set to true this.valid_answer = true ``` ```typescript // Error: set to false this.valid_answer = false ``` -------------------------------- ### Generate Content with Error Handling Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/03-types.md Use the generateContent method of a GenerativeModel to get a text response. Includes basic error handling for API key issues and other potential errors. ```typescript try { const result = await model.generateContent(prompt) const text = await result.response.text() return text } catch(e: any) { if(e.message.toLowerCase().includes("api key")) { return "-2" // API key error } return "-1" // Other error } ``` -------------------------------- ### Build for Production Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/05-configuration.md Generate optimized bundles for production deployment. The output is placed in the dist/ directory. ```bash npm run build ``` -------------------------------- ### Run Tests Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/00-api-index.md Executes the project's test suite. ```bash npm test ``` -------------------------------- ### Build System Prompt with Date and Entries Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/07-data-flow.md Constructs a system prompt for the Gemini API by including the current date and appending a list of journal entries. This is useful for providing context to the AI model. ```typescript // Step 1: Get current date const today = new Date() const formattedDate = today.toLocaleDateString('en-US') // Example: "6/23/2024" // Step 2: Initialize system message let prompt = `This is today's date: ${formattedDate}. I'm passing you a list of journal entries at the end of this prompt. Here is a question the author just asked about all of the entries: ${question_to_ask}. Please pay attention to dates... Here are the entries: ` // Step 3: Append all journal entries for(let entry of this.journalEntries.getEntries(this.selected_journal)) { prompt += `${entry.date}\n${entry.entry}\n\n` } // Final prompt example: /* This is today's date: 6/23/2024. I'm passing you a list of journal entries at the end of this prompt. Here is a question the author just asked about all of the entries: What was the highlight of my last week?. Please pay attention to dates... Here are the entries: 2024-04-14 Demo went...amazing!... 2024-04-13 Demo day's looming... ... (more entries) */ ``` -------------------------------- ### Initialize GoogleGenerativeAI Client and Model Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/03-types.md Instantiate the GoogleGenerativeAI client with an API key and retrieve a generative model instance. Ensure you have your API key available. ```typescript const genAI = new GoogleGenerativeAI(this.api_key) const model = genAI.getGenerativeModel({ model: 'gemini-pro' }) const result = await model.generateContent(prompt) const text = await result.response.text() ``` -------------------------------- ### Initialize GoogleGenerativeAI with API Key Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/09-implementation-notes.md This snippet shows the current implementation of initializing the GoogleGenerativeAI client using a user-provided API key. Be aware of the risk of API key exposure in client-side code. ```typescript const genAI = new GoogleGenerativeAI(this.api_key) // User-provided key ``` -------------------------------- ### AppComponent Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/MANIFEST.md Documentation for the root AppComponent, including its properties and methods for navigation and journal selection. ```APIDOC ## AppComponent ### Description Root component of the application. Manages API key, selected journal, and navigation. ### Properties - **api_key** (string): Stores the API key for accessing services. - **selected_journal** (string): Indicates the currently selected journal type (short or long). ### Methods - **goBack()**: Navigates the user back to the previous view. - **select_short_journal()**: Selects the short journal for display. - **select_long_journal()**: Selects the long journal for display. ``` -------------------------------- ### Service Injection using inject() Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/09-implementation-notes.md Demonstrates injecting services using the inject() function, typically for services marked with providedIn: "root" to ensure application-level singletons. ```typescript // In JournalComponent journalEntries = inject(JournalEntries) // Service marked with providedIn: "root" @Injectable({providedIn: "root"}) export class JournalEntries { } ``` -------------------------------- ### GoogleGenerativeAI Constructor Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/03-types.md Initializes the GoogleGenerativeAI client with your API key. ```APIDOC ## GoogleGenerativeAI Constructor ### Description Initializes the client for interacting with the Google Generative AI API. ### Parameters #### Path Parameters - `apiKey` (string) - Required - Gemini API key for authentication ``` -------------------------------- ### Read Angular Input Signal Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/03-types.md Access the value of an input signal by calling it like a function `()`. This is necessary even when accessing properties of the input signal's value, as shown in the template example. ```typescript entry = input.required() // In template: {{entry().date}} // Call signal to access properties ``` -------------------------------- ### Application State Machine Diagram Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/07-data-flow.md Visual representation of the application's states and transitions, from initial login to viewing journal entries. ```text ┌─────────────────────┐ │ INITIAL STATE │ │ (No API Key) │ └──────────┬──────────┘ │ │ api_key entered ↓ ┌─────────────────────┐ │ LOGGED IN STATE │ │ (Ready for journal │ │ selection) │ └──────────┬──────────┘ │ ┌────┴────┐ │ │ ↓ ↓ SHORT LONG JOURNAL JOURNAL │ │ └────┬─────┘ │ ↓ ┌──────────────────────┐ │ JOURNAL VIEW STATE │ │ (Showing entries & │ │ question interface) │ └──────────┬───────────┘ │ │ goBack() clicked │ ↓ ┌──────────────────────┐ │ BACK TO LOGIN │ │ (selected_journal │ │ reset to "") │ └──────────────────────┘ ``` -------------------------------- ### ask_question Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/02-api-reference-components.md Main entry point for submitting a user question. It validates that the question is not empty before calling the core `ask()` method. ```APIDOC ## ask_question(): void ### Description Main entry point for submitting a user question. It validates that the question is not empty before calling the core `ask()` method. ### Validation - Returns with error message `"Please enter a question to ask Gemini about your journal"` if `question` is empty ``` -------------------------------- ### Watch Mode Builds Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/00-api-index.md Enables incremental builds, useful for continuous development and monitoring changes. ```bash npm run watch ``` -------------------------------- ### Bootstrap Angular Application Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/06-usage-examples.md Initializes the Angular application using `bootstrapApplication`. Errors during startup are logged to the console. Uses `AppComponent` as the root component and default `appConfig`. ```typescript import { bootstrapApplication } from '@angular/platform-browser' import { appConfig } from './app/app.config' import { AppComponent } from './app/app.component' bootstrapApplication(AppComponent, appConfig) .catch((err) => console.error(err)) ``` -------------------------------- ### Component State Management for AI Query Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/07-data-flow.md Illustrates the evolution of component state during an AI query process, from before submission to after receiving a response or an error. ```typescript // Before submission { api_key: "AIzaSy...", selected_journal: "short", question: "What was the highlight?", answer: "", valid_answer: false, error_message: "", loading: false } // During API call { loading: true, // Everything else unchanged // ... waiting for response } // After successful response { loading: false, answer: "The highlight of your last week was the successful demo on 2024-04-14...", valid_answer: true, error_message: "" } // After error response { loading: false, answer: "I cannot answer that question, please ask it in a different way.", valid_answer: false, error_message: "" } ``` -------------------------------- ### Angular Project File Structure Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/01-overview.md Overview of the directory structure for the Angular application, highlighting key files and their roles. ```tree src/app/ ├── main.ts # Application bootstrap ├── app.config.ts # Angular config ├── app.component.ts # Root component (login & journal selection) ├── journal.component.ts # Journal UI with query interface ├── entry.component.ts # Individual entry display └── journal-entries.ts # Data service with journal content ``` -------------------------------- ### EntryComponent Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/MANIFEST.md Documentation for the EntryComponent, focusing on its input signal and interface definition for displaying individual entries. ```APIDOC ## EntryComponent ### Description Component for displaying a single journal entry. ### Input Signal - **Entry InputSignal**: Receives an Entry object to display. ### Interface Definition - **Entry**: Defines the structure of a journal entry, including date and text. ``` -------------------------------- ### Project Dependency Structure Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/00-api-index.md Illustrates the hierarchical dependency of the main application components. This is useful for understanding the flow of data and control within the application. ```text main.ts → AppComponent → JournalComponent → EntryComponent → JournalEntries (service) ``` -------------------------------- ### goBack Method Implementation Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/02-api-reference-components.md Implements the goBack method which returns a function to reset the selected journal signal. This is used to return the user to the journal selection screen. ```typescript goBack() { return () => { this.selected_journal.set("") } } ``` -------------------------------- ### appConfig Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/08-module-exports.md Angular application configuration object passed to bootstrapApplication(). It currently has an empty provider array. ```APIDOC ## appConfig: ApplicationConfig ### Description Angular application configuration object passed to `bootstrapApplication()`. ### Type `ApplicationConfig` ### Properties - `providers`: `[]` - Empty provider array (no custom service providers) ### Usage ```typescript import { appConfig } from './app/app.config' bootstrapApplication(AppComponent, appConfig) ``` ``` -------------------------------- ### Helper Questions in HTML Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/06-usage-examples.md These HTML list items represent pre-populated questions that users can click to quickly explore the application's capabilities. Clicking an item calls the `ask` function with the question text. ```html
  1. What was the highlight of my last week?
  2. What were my goals for this month, and have I made progress?
  3. Can you summarize the overall mood of my journal this month?
``` -------------------------------- ### generateContent Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/03-types.md Sends a prompt to the model to generate content. ```APIDOC ## generateContent ### Description Sends a prompt to the model and returns the completion result. ### Parameters #### Path Parameters - `prompt` (string) - Required - The text prompt to generate content from ### Returns - `Promise` with structure: ```typescript { response: { text(): string // Returns the generated text response } } ``` ### Throws - Error with message containing `"api key"` (case-insensitive) for invalid/missing API keys - Other errors for rate limits, malformed requests, content filtering, etc. ``` -------------------------------- ### User Input to Output Flow Diagram Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/07-data-flow.md Detailed flow of user input processing, from keyboard events to Gemini API calls and response rendering. ```text User Input (Question Text) │ ↓ inputChanged(KeyboardEvent) ├─ if key == "Enter" → ask_question() ├─ if question != "" → clear error_message │ ↓ ask_question() ├─ Validate: question != "" ├─ if empty → set error_message └─ if OK → ask(question) │ ↓ ask(question_to_ask) ├─ Validate: api_key.length > 0 ├─ if empty → set error_message, return ├─ Set loading = true ├─ Get current date ├─ Build prompt with: │ • Current date │ • Full question text │ • All journal entries (date + text) ├─ Call callGemini(prompt) │ │ │ ↓ │ Model.generateContent(prompt) │ │ │ ├─ Try block: │ │ └─ Return response.text() │ └─ Catch block: │ ├─ if "api key" in error → return "-2" │ └─ else → return "-1" │ ├─ Set loading = false ├─ Check return value: │ ├─ "-1" → answer = error message, valid_answer = false │ ├─ "-2" → answer = invalid key message, valid_answer = false │ └─ else → answer = response text, valid_answer = true │ ↓ Render output in template: ├─ if error_message.length > 0 → show red error box ├─ if loading == true → show "Asking your question..." └─ if answer.length > 0 → show answer box │ ↓ User sees Gemini's response or error message ``` -------------------------------- ### ask Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/02-api-reference-components.md Core method for processing questions. It constructs a system prompt with the current date and journal entries, calls the Gemini API, and updates the component's state with the answer or error messages. ```APIDOC ## ask(question_to_ask: string): Promise ### Description Core method for processing questions. It constructs a system prompt with the current date and journal entries, calls the Gemini API, and updates the component's state with the answer or error messages. ### Parameters - `question_to_ask: string` - The question to ask about the journal ### System Prompt Construction - Includes today's date in `en-US` locale format - Includes all entries for the selected journal - Instructs Gemini to be mindful of dates and provide brief, contextual responses - Format: `"This is today's date: [DATE]. I'm passing you a list of journal entries... [ENTRIES]"` ### Error Handling - Returns error `"Please enter an API KEY for Gemini first."` if `api_key.length == 0` - Sets `answer` to `"I cannot answer that question, please ask it in a different way."` if `callGemini()` returns `"-1"` (non-API-key error) - Sets `answer` to `"API key is invalid. Please go back and enter a valid API key."` if `callGemini()` returns `"-2"` (API key error) - Sets `valid_answer = true` on successful response ### Side Effects - Sets `loading = true` before API call, `loading = false` after completion - Updates `question`, `answer`, `valid_answer`, and `error_message` properties ``` -------------------------------- ### EntryComponent Template Rendering Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/02-api-reference-components.md Illustrates how the journal entry's date and text are rendered within the EntryComponent's template. Access to signal values is done via function calls. ```html
{{entry().date}}
{{entry().entry}}
``` -------------------------------- ### Construct Gemini API Prompt Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/09-implementation-notes.md Formats the current date, appends journal entries, and builds the system message for the Gemini API. Ensure 'today' and 'entries' are properly defined before use. ```typescript // Input: question_to_ask (string) // selected_journal ("short" or "long") // Step 1: Format date const formattedDate = today.toLocaleDateString('en-US') // Step 2: Build system message with instructions let prompt = `This is today's date: ${formattedDate}... // Step 3: Append all entries for(let entry of entries) { prompt += `${entry.date}\n${entry.entry}\n\n` } // Output: Full prompt string sent to Gemini API ``` -------------------------------- ### Submit User Question in Journal Component Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/02-api-reference-components.md Main entry point for submitting a user question. It validates that the question is not empty before calling the core 'ask' method. ```typescript async ask_question() { if(this.question == "") { this.error_message = "Please enter a question to ask Gemini about your journal" return } await this.ask(this.question) } ``` -------------------------------- ### AppComponent Methods Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/00-api-index.md Methods available on the root AppComponent for controlling journal selection and navigation. ```APIDOC ## AppComponent Methods ### `goBack` - **Description**: Returns a callback function that resets the journal selection. - **Signature**: `(): () => void` ### `select_short_journal` - **Description**: Sets the selected journal to "short". - **Signature**: `(): void` ### `select_long_journal` - **Description**: Sets the selected journal to "long". - **Signature**: `(): void` ``` -------------------------------- ### Loop (For Block) Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/00-api-index.md Use to iterate over a collection and render a template for each item. The `track` expression is important for performance. ```html @for(item of items; track item) { } ``` -------------------------------- ### Bind Entry to Component in Parent Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/06-usage-examples.md Shows how to bind a journal entry object to the `entry` input of the `app-entry` component from a parent component. ```html ``` -------------------------------- ### Handle User Input for Question Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/06-usage-examples.md Manages user input for questions, triggering the `ask_question` method on Enter key press or button click. It also clears error messages as the user types. ```typescript // Listen for Enter key or button click inputChanged(e: KeyboardEvent) { if(e.key == "Enter") { this.ask_question() // Submit on Enter } if(this.question != "") { this.error_message = "" // Clear error when typing } } // Button click handler async ask_question() { if(this.question == "") { this.error_message = "Please enter a question to ask Gemini about your journal" return } await this.ask(this.question) } ``` -------------------------------- ### callGemini Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/02-api-reference-components.md Calls the Gemini API with the provided prompt. It handles API key validation and general errors, returning specific codes for different failure scenarios. ```APIDOC ## callGemini(prompt: string): Promise ### Description Calls the Gemini API with the provided prompt. It handles API key validation and general errors, returning specific codes for different failure scenarios. ### Parameters - `prompt: string` - Full prompt including context and journal entries ### Returns `Promise` - Success: Raw text from `response.text()` - API Key Error: `"-2"` (error message includes "api key" in lowercase) - Other Errors: `"-1"` (any other error) ### Model Uses `gemini-pro` model via `GoogleGenerativeAI` SDK ### Try-Catch Behavior - Catches all exceptions and categorizes by error message - Distinguishes API key errors from other failures ``` -------------------------------- ### API Error Handling in callGemini Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/09-implementation-notes.md Demonstrates how the callGemini function categorizes API errors, distinguishing between API key issues and other errors by returning specific codes. ```plaintext API Error (throw) ↓ catch in callGemini() ├─ Check: e.message.toLowerCase().includes("api key") ├─ return "-2" or "-1" ↓ Back in ask() ├─ Check: geminiOutput == "-2" or "-1" ├─ Set: answer = user_message, valid_answer = false ↓ Template ├─ Conditional: [hidden]="!valid_answer" ├─ Render answer with or without "Gemini's answer:" heading ``` -------------------------------- ### Signal Flow for Journal Component Rendering Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/09-implementation-notes.md Illustrates the flow of signals and data that triggers the rendering of the JournalComponent based on changes in the selected journal. ```plaintext AppComponent.selected_journal ↓ (signal change triggers re-render) ↓ Conditional rendering: @if(selected_journal() != "") ↓ Shows JournalComponent ↓ Passes: [selected_journal]="selected_journal()" ↓ JournalComponent ↓ Uses input property to call: journalEntries.getEntries(selected_journal) ↓ Returns entries for display ``` -------------------------------- ### Gemini API Key Input in AppComponent Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/05-configuration.md Handles user input for the Gemini API key in the AppComponent template. The entered key is bound to the `api_key` property and passed to the GoogleGenerativeAI constructor. Ensure the key is non-empty to enable journal selection. For production, consider backend proxies or OAuth for security. ```html
``` -------------------------------- ### AppComponent Properties Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/02-api-reference-components.md Exposes properties for API key management and selected journal state. ```APIDOC ## AppComponent Properties ### `api_key` - **Type**: `string` - **Default**: `""` - **Description**: User-provided Gemini API key; triggers conditional rendering of journal interface. ### `selected_journal` - **Type**: `Signal` - **Default**: `""` - **Description**: Angular signal tracking the currently selected journal (`"short"`, `"long"`, or empty). ``` -------------------------------- ### User Interaction Flow Diagram Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/07-data-flow.md Visualizes the complete user interaction flow, including API key input, journal selection, question input, asking questions, and answer display. It shows data binding with `ngModel` and event handling for clicks and keyups. ```text ┌─────────────────────────────────────────────────────────┐ │ USER INTERFACE │ ├─────────────────────────────────────────────────────────┤ │ │ │ 1. [API Key Input] ──[(ngModel)]──> api_key property │ │ │ │ 2. [Select Journal Button] │ │ └─ (click) ──> select_short_journal() / select... │ │ └─ selected_journal.set("short") │ │ └─ Template re-renders (signal change) │ │ │ │ 3. [Question Input] ──[(ngModel)]──> question prop │ │ (keyup) ──> inputChanged(event) │ │ ├─ if key=="Enter" ──> ask_question() │ │ └─ clear error if typing │ │ │ │ 4. [Ask Button] │ │ └─ (click) ──> ask_question() │ │ └─ Validate & call ask(question) │ │ │ │ 5. [Helper Question] │ │ └─ (click) ──> ask(preset_question) │ │ │ │ 6. Loading indicator updates │ │ └─ [hidden]="!loading" │ │ │ │ 7. Answer box updates │ │ └─ @for(line of answer.split("\n")) │ │ │ │ 8. [Switch Journals Button] │ │ └─ (click) ──> goBack() │ │ └─ selected_journal.set("") │ │ └─ Return to login screen │ │ │ └─────────────────────────────────────────────────────────┘ ``` -------------------------------- ### select_short_journal Method Implementation Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/02-api-reference-components.md Sets the selected_journal signal to 'short' if an API key is present. This method is called when the user selects the 'Short Journal' option. ```typescript select_short_journal() { if(this.api_key != "") { this.selected_journal.set("short") } } ``` -------------------------------- ### Import Angular Bootstrap Dependencies Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/08-module-exports.md Imports necessary Angular modules for bootstrapping the application. These are typically found in the main entry point of an Angular application. ```typescript import { bootstrapApplication } from '@angular/platform-browser' import { appConfig } from './app/app.config' import { AppComponent } from './app/app.component' ``` -------------------------------- ### JournalComponent Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/MANIFEST.md Detailed API for the JournalComponent, covering input properties, state, and public methods for interacting with the Gemini API. ```APIDOC ## JournalComponent ### Description Component responsible for displaying journal entries and interacting with the Gemini API to generate content. ### Input Properties - **InputSignal** (Entry): An input signal that receives entry data. ### State Properties - **(5 state properties)**: Internal state variables managed by the component. ### Methods - **inputChanged()**: Handles changes in input fields. - **ask_question()**: Initiates a question to the Gemini API. - **ask()**: General method to ask a question. - **callGemini()**: Core method to interact with the Gemini API. ### Code Examples (Code examples for each method are provided in the source documentation.) ``` -------------------------------- ### Implement Navigation Back Functionality Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/06-usage-examples.md Allows a parent component to provide a callback function (`goBack`) to navigate back. The `JournalComponent` calls this callback to reset the `selected_journal` signal, which in turn triggers a UI update to return to the journal selection screen. ```typescript // Parent passes callback @Input() goBack = () => {} // Component calls it to return to journal selection (click)="goBack()" // Implementation in AppComponent goBack() { return () => { this.selected_journal.set("") // Reset to empty } } ``` -------------------------------- ### Call Gemini API with Prompt Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/02-api-reference-components.md Calls the Gemini API using the provided prompt. It handles potential errors, distinguishing between API key issues (returning '-2') and other general errors (returning '-1'). ```typescript async callGemini(prompt: string) { const genAI = new GoogleGenerativeAI(this.api_key); const model = genAI.getGenerativeModel({ model: 'gemini-pro' }); try { const result = await model.generateContent(prompt); const response = await result.response; const text = response.text(); return text } catch(e: any) { if(e.message.toLowerCase().includes("api key")) { return "-2" } else { return "-1" } } } ``` -------------------------------- ### Define Angular Application Configuration Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/08-module-exports.md Exports the application configuration object, which is used to configure Angular services and providers. This is passed to `bootstrapApplication`. ```typescript export const appConfig: ApplicationConfig = { providers: [] } ``` -------------------------------- ### JournalComponent Methods Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/00-api-index.md Methods available on the JournalComponent for handling user input and interacting with the Gemini API. ```APIDOC ## JournalComponent Methods ### `inputChanged` - **Description**: Handles keyboard events on the question input field. - **Signature**: `(e: KeyboardEvent): void` - **Async**: No ### `ask_question` - **Description**: Entry point for submitting a question. - **Signature**: `(): void` - **Async**: No ### `ask` - **Description**: Core processing method that constructs a prompt and calls the Gemini API. - **Signature**: `(question_to_ask: string): Promise` - **Async**: Yes ### `callGemini` - **Description**: Calls the Gemini API and returns the text response or an error code. - **Signature**: `(prompt: string): Promise` - **Async**: Yes ``` -------------------------------- ### Access Journal Entries via Dependency Injection Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/06-usage-examples.md Demonstrates how to inject `JournalEntries` to access journal data within a component. The `getEntries` method can be called with a parameter to specify which entries to retrieve. ```typescript journalEntries = inject(JournalEntries) // In component method: const entries = this.journalEntries.getEntries("short") // Returns: Array<{ date: string, entry: string }> ``` -------------------------------- ### Gemini API Call Flow Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/07-data-flow.md Illustrates the sequence of operations for calling the Gemini API, including client creation, model instantiation, content generation, response handling, and error management. This flow is essential for integrating AI capabilities. ```javascript User submits question │ ↓ JournalComponent.ask(question) │ ├─ Construct full prompt with context │ ↓ JournalComponent.callGemini(prompt) │ ├─ Create GoogleGenerativeAI client │ const genAI = new GoogleGenerativeAI(this.api_key) │ ├─ Get model instance │ const model = genAI.getGenerativeModel({ model: 'gemini-pro' }) │ ├─ Send request (async) │ const result = await model.generateContent(prompt) │ ├─ Extract response │ const response = await result.response │ const text = response.text() │ ├─ Return text to caller │ return text │ └─ Error handling (catch) if(e.message.toLowerCase().includes("api key")) { return "-2" // API key error code } else { return "-1" // Generic error code } Back in ask(): │ ├─ Check return value │ ├─ "-1": error_message="I cannot answer..." │ ├─ "-2": error_message="API key is invalid..." │ └─ text: answer=text, valid_answer=true │ ↓ Template re-renders with new answer ``` -------------------------------- ### Process Questions with Gemini API Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/02-api-reference-components.md Core method for processing user questions. It constructs a system prompt with the current date and journal entries, calls the Gemini API, and updates the component's state, including loading status and error handling. ```typescript async ask(question_to_ask: string) { this.question = question_to_ask if(this.api_key.length == 0) { this.error_message = "Please enter an API KEY for Gemini first." return } this.loading = true const today = new Date(); const formattedDate = today.toLocaleDateString('en-US'); let prompt = `This is today's date: ${formattedDate}. I'm passing you a list of journal entries...` for(let entry of this.journalEntries.getEntries(this.selected_journal)) { prompt += `${entry.date}\n${entry.entry}\n\n` } const geminiOutput = await this.callGemini(prompt) this.loading = false if(geminiOutput == "-1") { this.answer = "I cannot answer that question, please ask it in a different way." this.valid_answer = false } else if(geminiOutput == "-2") { this.answer = "API key is invalid. Please go back and enter a valid API key." this.valid_answer = false } else { this.answer = geminiOutput this.valid_answer = true } } ``` -------------------------------- ### Configure Gemini Model Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/05-configuration.md Select the Gemini model to use. This is hard-coded and requires source code modification to change. ```typescript const model = genAI.getGenerativeModel({ model: 'gemini-pro' }); ``` -------------------------------- ### AppComponent Template Rendering with Conditional Logic Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/07-data-flow.md Demonstrates how to conditionally render the JournalComponent based on the presence of an API key and selected journal. Shows property binding, signal unwrapping, method binding, and two-way binding with ngModel. ```typescript @if(api_key != "" && selected_journal() != "") { // Show JournalComponent } @else { // Show login/selection screen // ← two-way binding
// ← event binding
// ← event binding } ``` -------------------------------- ### Render Response Lines in HTML Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/09-implementation-notes.md Iterates over a string split by newline characters and renders each line within a separate HTML div element. This is a common pattern for displaying multi-line text responses. ```html @for(answerLine of answer.split("\n"); track answerLine) {
{{answerLine}}
} ``` -------------------------------- ### Template Usage for Valid Answer Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/04-errors.md HTML template usage for conditionally displaying the 'Gemini's answer:' heading based on the `valid_answer` property. ```html

Gemini's answer:

``` -------------------------------- ### Call Gemini API with Journal Entries Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/06-usage-examples.md This function orchestrates calling the Gemini API. It validates the API key, sets a loading state, formats the current date, builds a prompt including journal entries, calls the Gemini API, and processes the response. ```typescript async ask(question_to_ask: string) { // 1. Validate API key if(this.api_key.length == 0) { this.error_message = "Please enter an API KEY for Gemini first." return } // 2. Set loading state this.loading = true // 3. Get today's date const today = new Date() const formattedDate = today.toLocaleDateString('en-US') // 4. Build system prompt with date context let prompt = `This is today's date: ${formattedDate}. I'm passing you a list of journal entries at the end of this prompt. Here is a question the author just asked about all of the entries: ${question_to_ask}. ...` // 5. Append all journal entries to prompt for(let entry of this.journalEntries.getEntries(this.selected_journal)) { prompt += `${entry.date}\n${entry.entry}\n\n` } // 6. Call Gemini API const geminiOutput = await this.callGemini(prompt) // 7. Clear loading state this.loading = false // 8. Process response or error code if(geminiOutput == "-1") { this.answer = "I cannot answer that question, please ask it in a different way." this.valid_answer = false } else if(geminiOutput == "-2") { this.answer = "API key is invalid. Please go back and enter a valid API key." this.valid_answer = false } else { this.answer = geminiOutput this.valid_answer = true } } async callGemini(prompt: string) { const genAI = new GoogleGenerativeAI(this.api_key) const model = genAI.getGenerativeModel({ model: 'gemini-pro' }) try { const result = await model.generateContent(prompt) const response = await result.response const text = response.text() return text } catch(e: any) { if(e.message.toLowerCase().includes("api key")) { return "-2" // API key error } else { return "-1" // Other error } } } ``` -------------------------------- ### Select Short Journal Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/06-usage-examples.md This TypeScript code snippet demonstrates how to select the 'Short Journal'. It internally calls the `select_short_journal` method, sets the `selected_journal` to 'short', and triggers a render of the JournalComponent. ```typescript // Internally calls: this.select_short_journal() // Which sets: this.selected_journal.set("short") // And triggers render of JournalComponent with: [selected_journal]="selected_journal()" // Value: "short" ``` -------------------------------- ### Bind User Input to Template Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/06-usage-examples.md Binds a text input field to the `question` property using `ngModel` and listens for keyboard events using `(keyup)`. A button is provided to trigger the `ask_question` method. ```html ``` -------------------------------- ### Format Date using en-US Locale Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/05-configuration.md This snippet demonstrates how to format the current date using the 'en-US' locale. This is used to provide context to the Gemini API. ```typescript const formattedDate = today.toLocaleDateString('en-US') ``` -------------------------------- ### Entry Interface Definition Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/00-api-index.md Defines the structure for a journal entry, including the date and the entry content. The date should be in ISO 8601 format. ```typescript interface Entry { date: string // ISO 8601 format (YYYY-MM-DD) entry: string // Journal text content } ``` -------------------------------- ### getEntries Method Implementation Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/02-api-reference-components.md Implements the logic to retrieve journal entries based on the provided journal type. Returns specific entry arrays for 'short' and 'long' selections, and a default blank entry for any other input. ```typescript getEntries(selected_journal: string) { if(selected_journal == "short") { return this.short_entries } if(selected_journal == "long") { return this.long_entries } return this.blank_entries } ``` -------------------------------- ### Entry Interface Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/08-module-exports.md The Entry interface defines the structure for a journal entry, containing a date and the entry text. ```APIDOC ## Entry Interface ### Description Defines the structure of a journal entry. ### Fields - **date** (string) - The date of the journal entry in ISO 8601 format. - **entry** (string) - The text content of the journal entry. ``` -------------------------------- ### AppComponent Class Definition Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/02-api-reference-components.md Defines the root component 'AppComponent', its selector, standalone status, imported modules, and template/style placeholders. It also declares properties and methods. ```typescript @Component({ selector: 'app-root', standalone: true, imports: [JournalComponent, FormsModule], template: `...`, styles: `...` }) export class AppComponent { api_key: string selected_journal: Signal goBack(): () => void select_short_journal(): void select_long_journal(): void } ``` -------------------------------- ### Direct User Input Interpolation in Prompt Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/09-implementation-notes.md This code directly interpolates user input into a prompt string. This approach carries a risk of prompt injection, as no escaping or sanitization is applied. ```typescript let prompt = `Question: ${question_to_ask}...` // User input directly interpolated ``` -------------------------------- ### Signal-Based Reactivity for State Management Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/09-implementation-notes.md Utilizes signals for state management, such as tracking selected journal entries. Signals can be set using .set() and read in templates by invoking them. ```typescript selected_journal = signal("") // Setting: this.selected_journal.set("short") // Reading in template: selected_journal() ``` -------------------------------- ### JournalEntries Service Methods Source: https://github.com/google-gemini/journal-with-gemini/blob/main/_autodocs/00-api-index.md Methods provided by the JournalEntries service for retrieving journal data. ```APIDOC ## JournalEntries Service Methods ### `getEntries` - **Description**: Returns journal entries for a specified journal type. - **Signature**: `(selected_journal: string): JournalEntry[]` - **Returns**: An array of `JournalEntry` objects. ```