from datetime import datetime

file_from = open("./subtitle_file.srt", "r")
file_to = open("./subtitle_file.srt.json", "w", encoding="utf-8")

file_to.write("{\"fragments\": [\n")

state = 0
fragment_id = 0

for line in file_from:
    fragment_id += 1
    line = line.strip("\n")
    if line == "":
        if state > 0:
            file_to.write("]},\n")
        state = 0
    elif state == 0:
        state = 1
    elif state == 1:
        state = 2
        begin_end = line.split(" --> ")
        begin = (datetime.strptime(begin_end[0], '%H:%M:%S,%f') - datetime(1900,1,1)).total_seconds()
        end = (datetime.strptime(begin_end[1], '%H:%M:%S,%f') - datetime(1900,1,1)).total_seconds()
        file_to.write("{\"begin\": \"" + str(begin) + "\",\"children\": [],\"end\": \"" + str(end) + "\",\"id\": \"" + str(fragment_id) + "\",\"language\": \"ru\",\"lines\": [")
    else:
        if state == 3:
            file_to.write(",")
        file_to.write("\"" + line.replace("\"", "\\\"") + "\"")
        state = 3

file_to.write("]}\n]}")
file_to.close()