Added microservice to download PDFs

Procfile

@@ -1 +0,0 @@
-web: gunicorn main:app

main.py

@@ -3,8 +3,9 @@ Portfolio Project for CS361 Spring 2022
 Written by Lucas Jensen
 Last updated 5/12 for Assignment 1
 """
-from flask import Flask, redirect, render_template, request
+from flask import Flask, redirect, render_template, request, send_file
 from recipe import Recipe, RecipeBook
+from time import sleep
 
 app = Flask(__name__)
 book = RecipeBook()
@@ -25,17 +26,39 @@ def recipes_page():
 
 @app.route('/recipes/<_id>', methods=['GET', 'POST'])
 def recipe_page(_id):
-    recipe = book.find_by_id(_id)
+    recipe = book.find_by_id(str(_id))
 
     if request.method == 'POST':
+        if 'scale' in request.form:
             scale = request.form.get('scale')
             new = recipe.scale(scale)
             new_id = book.add_recipe(new)
             return redirect(f'/recipes/{new_id}')
 
+        else:
+            path = write_txt(_id)
+            sleep(0.5)
+            return send_file(path, as_attachment=True)
+
     return render_template("recipe.html", content=recipe, _id=_id)
 
 
+def write_txt(_id):
+    """
+    writes to the txt file to have the microservice make a selected pdf
+    :return:
+    """
+    print(_id)
+    with open('recipe.txt', 'w') as txt_file:
+        txt_file.write(_id)
+
+    return f"recipe{_id}.pdf"
+
+
+# app.route('/recipes/<id>/download')
+# def
+
+
 @app.route('/recipes/<_id>/delete')
 def delete_recipe(_id):
     book.find_and_delete(_id)

pdf-generator.py

@@ -0,0 +1,117 @@
+"""
+Reads a key from a txt file. Searches a json file with the key.
+Exports the key values in a pdf form. Writes the PDF file name
+to the txt file.
+"""
+
+import json
+from fpdf import FPDF
+from time import sleep
+
+TXTFILE = 'recipe.txt'  # update to txt file name for read
+JSONFILE = 'recipes.json'  # update to json file name for read
+CATEGORY = 'recipe'  # update category to preceed number in PDF file name
+
+
+def create_pdf() -> object:
+    """
+    Create pdf object from FPDF class
+    :return: PDF object
+    """
+    pdf = FPDF()
+    pdf.add_page()
+    pdf.set_font("Arial", size=15)
+    return pdf
+
+
+def read_txt(file_name) -> object:
+    """
+    Open/reads txt file argument
+    :param file_name(str)
+    :return: file content
+    """
+    with open(file_name, 'r') as txt_file:
+        content = txt_file.read()
+        return content
+
+
+def load_json(file_name) -> object:
+    """
+    Opens/loads json file argument
+    :param file_name(str)
+    :return: file contentquit
+    """
+    with open(file_name, 'r') as json_file:
+        content = json.load(json_file)
+        return content
+
+
+def add_pdf_content(txt_content, json_content, pdf) -> None:
+    """
+    Searches json content with key from txt_content. Adds relevant data to pdf object.
+    :param txt_content: txt file content for json search
+    :param json_content: json file content to search
+    :param pdf: pdf object to update
+    :return: none
+    """
+    for key, value in json_content.items():
+        if key == txt_content:
+            for key, value in value.items():
+                if isinstance(value, dict):
+                    pdf.cell(200, 10, txt=key.title() + ":", ln=1, align='C')
+                    for key, value in value.items():
+                        pdf.cell(200, 10, txt=key + ": " + str(value), ln=1, align='C')
+                else:
+                    pdf.cell(200, 10, txt=key.title() + ": " + str(value), ln=1, align='C')
+
+
+def generate_pdf(category_name, txt_content, pdf) -> str:
+    """
+    Generate pdf file from pdf object with relevant naming 'category + key from txt file'
+    :param category_name: category for pdf title
+    :param txt_content: txt identifier for pdf title
+    :param pdf: pdf object to generate pdf file
+    :return: pdf file name
+    """
+    pdf.output(f"{category_name}{txt_content}.pdf")
+    return f"{category_name}{txt_content}.pdf"
+
+
+def write_txt(file_name, pdf_file) -> None:
+    """
+    Write generated pdf file name to txt file
+    :param file_name: txt file(str) to write to
+    :param pdf_file: pdf file name to write(str)
+    :return: none
+    """
+    with open(file_name, 'w') as txt_file:
+        txt_file.write(pdf_file)
+
+
+def main():
+    initial_content = read_txt(TXTFILE)  # initialize variables for while loop comparison
+
+    while True:
+        updated_content = read_txt(TXTFILE)
+        # watch for txt change
+        if updated_content != initial_content:
+            if updated_content == 'QUIT':  # exit program upon cue
+                break
+
+            pdf = create_pdf()  # create pdf object for file generation
+
+            json_content = load_json(JSONFILE)  # load json content for data search
+
+            add_pdf_content(updated_content, json_content, pdf)  # update pdf object with data
+
+            pdf_file_name = generate_pdf(CATEGORY, updated_content, pdf)  # generate pdf file with appropriate name
+
+            write_txt(TXTFILE, pdf_file_name)  # write pdf file name to txt file
+
+            initial_content = read_txt(TXTFILE)  # update comparison variable
+
+        sleep(.25)
+
+
+if __name__ == "__main__":
+    main()

recipe.py

@@ -8,7 +8,7 @@ Last updated 5/12
 import json
 from pprint import pprint
 
-JSON_FILE = "recipes/recipes.json"
+JSON_FILE = "recipes.json"
 
 
 class RecipeBook:

recipe.txt

@@ -0,0 +1 @@
+recipe1.pdf

recipes.json

@@ -0,0 +1,28 @@
+{
+    "0": {
+        "quantity": "2",
+        "name": "Sourdough",
+        "ingredients": {
+            "AP Flour": 500,
+            "WW Flour": 500,
+            "Rye Flour": 0,
+            "Water": 0,
+            "Salt": 0,
+            "Yeast": 0,
+            "Starter": 0
+        }
+    },
+    "1": {
+        "quantity": "2",
+        "name": "Sourdough * 1.0",
+        "ingredients": {
+            "AP Flour": 500,
+            "WW Flour": 500,
+            "Rye Flour": 0,
+            "Water": 0,
+            "Salt": 0,
+            "Yeast": 0,
+            "Starter": 0
+        }
+    }
+}

recipes/recipes.json

@@ -1,15 +0,0 @@
-{
-    "0": {
-        "quantity": "2",
-        "name": "Sourdough",
-        "ingredients": {
-            "AP Flour": 500,
-            "WW Flour": 500,
-            "Rye Flour": 0,
-            "Water": 0,
-            "Salt": 0,
-            "Yeast": 0,
-            "Starter": 0
-        }
-    }
-}

runtime.txt

@@ -1 +0,0 @@
-python-3.10.0

templates/recipe.html

@@ -33,6 +33,9 @@
   </form>
 
     <input type="button" onclick="location.href='/recipes/{{_id}}/delete'" value=Delete />
+<form method="post">
+    <button type="submit">Download</button>
+</form>
 
 
 {% endblock %}