RenderAndSaveQuestion

from __future__ import (absolute_import, division, print_function,
                        unicode_literals)
import pymongo
import  matplotlib
matplotlib.use('TkAgg')
import pylab
import matplotlib.pyplot as plt
mongo_connection = pymongo.MongoClient("mongodb://localhost")
db = mongo_connection.mathpix
questions = db['questions']
errors =db['errors']
direcotry = '/Users/lingaraj/Desktop/questionRenders/'

#questionText -> A combination of latex and questiontext which needs to be converted and saved as an Image
def renderAndSaveFileUsingPyLab(questionId,questionText):
    fig = pylab.figure()
    text = fig.text(0, 0, questionText)

    # Saving the figure will render the text.
    dpi = 300
    fig.savefig('formula.png', dpi=dpi)

    # Now we can work with text's bounding box.
    bbox = text.get_window_extent()
    width, height = bbox.size / float(dpi) + 0.005
    # Adjust the figure size so it can hold the entire text.
    fig.set_size_inches((width, height))

    # Adjust text's vertical position.
    dy = (bbox.ymin / float(dpi)) / height
    text.set_position((0, -dy))

    # Save the adjusted text.
    fig.savefig(direcotry+questionId+'.png', dpi=dpi)
    pass


def renderAndSaveFile(questionId,questionText):
    plt.title(questionText,fontsize=20)
    #plt.text(questionText)
    plt.box(on=False)
    #plt.text(10, 10, questionText, fontsize=8)
    ax = plt.gca()
    ax.axes.get_xaxis().set_visible(False)
    ax.axes.get_yaxis().set_visible(False)
    plt.draw()
    plt.savefig(direcotry+questionId+'.png',dpi=900)
    pass


def updateError(question_id):
    try:
        cursor = errors.find_one({'questionId',question_id})
        if cursor is None:
            errors.insert_one({'questionId',question_id})
            print('Question Id marked as error:',question_id)
    except Exception as e:
        print('problem inserting errors',type(e),e)
    pass


def readAndRenderQuestionsCollection():
    try:
        cursor = questions.find({})
        errorIds = []
        count = 1
        for doc in cursor:
            print ('processing record',count)
            question_id = doc['questionId']
            try:
                question_text = doc['questionText']
                renderAndSaveFileUsingPyLab(question_id,question_text)
            except Exception as e:
                updateError(question_id)
                errorIds.append(question_id)
                print('Problem with Question Text',type(e),e)

            #renderAndSaveFile(question_id,question_text)
            count = count + 1
    except Exception as e:
        print('Error reading data from collection:',type(e),e)
    pass

if __name__ == '__main__':
    readAndRenderQuestionsCollection()