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from dotenv import load_dotenv
load_dotenv()
import os
import sys
import traceback
import tempfile
from typing import cast
from flask import Flask, render_template, request
from flask_compress import Compress # type: ignore
import log_db
from log_db import DB, Bound, Value
app = Flask(__name__)
Compress(app)
BASE_URL = os.environ["BASE_URL"]
DB_DIR = os.environ["DB_DIR"] if "DB_DIR" in os.environ else tempfile.TemporaryDirectory().name
print("""\n"""
f"""BASE_URL: {BASE_URL}\n"""
f"""DB_DIR: {DB_DIR}\n""")
db_fields = ["id", "name"]
db_types = ["int", "string"]
db = DB \
.configure() \
.data_dir(DB_DIR) \
.fields(db_fields) \
.primary_key("id") \
.secondary_keys(["name"]) \
.initialize()
def error(e: str, code: int):
error_text = f"HTTP {code}: {e}"
#return render_template("page_error.html.j2", error = error_text)
htmp_target = request.form.get("htmp") or request.args.get("htmp")
if htmp_target:
return render_template("frag_error.html.j2", error = error_text, container = htmp_target)
else:
return render_template("page_error.html.j2", error = error_text)
@app.errorhandler(Exception)
def error_handler(e: Exception):
if hasattr(e, "code") and 400 >= getattr(e, "code") < 500:
return error(str(e), getattr(e, "code"))
else:
traceback.print_exception(e, file=sys.stderr)
return error("Internal Server Error", 500)
@app.get("/")
def index_default():
return index("find")
@app.get("/<op>")
def index(op: str):
if op not in ["find", "range", "upsert", "delete"]:
return error("Invalid operation", 400)
rows = db.range_by("id", Bound.unbounded(), Bound.unbounded(), limit=100)
rows = [[value_to_str(v) for v in row] for row in rows]
htmp_target = request.form.get("htmp") or request.args.get("htmp")
if htmp_target:
return render_template(f"frag_form_{op}.html.j2")
else:
return render_template('page_main.html.j2',
selected_form = f"frag_form_{op}.html.j2",
field_names = ["id", "name"],
rows = rows,
)
@app.post("/find")
def query_find():
field = request.form.get("field")
if not field: raise ValueError("Field is required")
values = request.form.get("values")
if not values: raise ValueError("Values are required")
field_index = db_fields.index(field)
if field_index == -1: raise ValueError(f"Field '{field}' not found")
try:
values = [cast_to_value(field, v) for v in values.split("\n")]
values = [v for v in values if v is not None]
except ValueError as e:
return error(str(e), 400)
tagged_rows = db.batch_find_by(field, values, limit=100)
rows = [[value_to_str(v) for v in row] for (_, row) in tagged_rows]
htmp_target = request.form.get("htmp") or request.args.get("htmp")
if htmp_target:
return render_template("frag_results.html.j2",
field_names = ["id", "name"],
rows = rows,
)
else:
return render_template('page_main.html.j2',
selected_form = "frag_form_find.html.j2",
field_names = ["id", "name"],
rows = rows,
)
@app.post("/range")
def query_range():
field = request.form.get("field")
if not field: raise ValueError("Field is required")
from_type = request.form.get("from_type")
if not from_type: raise ValueError("From type is required")
to_type = request.form.get("to_type")
if not to_type: raise ValueError("To type is required")
field_index = db_fields.index(field)
if field_index == -1: raise ValueError(f"Field '{field}' not found")
match from_type:
case "unbounded":
bound_lower = Bound.unbounded()
case "included":
from_value = request.form.get("from_value")
try:
if not from_value: raise ValueError("From value is required")
from_value = cast_to_value(field, from_value)
except ValueError as e:
return error(str(e), 400)
bound_lower = Bound.included(cast(Value, from_value))
case "excluded":
from_value = request.form.get("from_value")
try:
if not from_value: raise ValueError("From value is required")
from_value = cast_to_value(field, from_value)
except ValueError as e:
return error(str(e), 400)
bound_lower = Bound.excluded(cast(Value, from_value))
case _:
return error("Invalid from type", 400)
match to_type:
case "unbounded":
bound_upper = Bound.unbounded()
case "included":
to_value = request.form.get("to_value")
try:
if not to_value: raise ValueError("To value is required")
to_value = cast_to_value(field, to_value)
except ValueError as e:
return error(str(e), 400)
bound_upper = Bound.included(cast(Value, to_value))
case "excluded":
to_value = request.form.get("to_value")
try:
if not to_value: raise ValueError("To value is required")
to_value = cast_to_value(field, to_value)
except ValueError as e:
return error(str(e), 400)
bound_upper = Bound.excluded(cast(Value, to_value))
case _:
return error("Invalid to type", 400)
tagged_rows = db.range_by(field, bound_lower, bound_upper, limit=100)
rows = [[value_to_str(v) for v in row] for row in tagged_rows]
htmp_target = request.form.get("htmp") or request.args.get("htmp")
if htmp_target:
return render_template("frag_results.html.j2",
field_names = ["id", "name"],
rows = rows,
)
else:
return render_template('page_main.html.j2',
selected_form = "frag_form_range.html.j2",
field_names = ["id", "name"],
rows = rows,
)
@app.post("/delete")
def query_delete():
field = request.form.get("field")
if not field: raise ValueError("Field is required")
value = request.form.get("value")
if not value: raise ValueError("Value is required")
field_index = db_fields.index(field)
if field_index == -1: raise ValueError(f"Field '{field}' not found")
try:
value = cast_to_value(field, value)
except ValueError as e:
return error(str(e), 400)
rows = db.delete_by(field, cast(Value, value))
rows = [[value_to_str(v) for v in row] for row in rows]
htmp_target = request.form.get("htmp") or request.args.get("htmp")
if htmp_target:
return render_template("frag_results.html.j2",
field_names = ["id", "name"],
rows = rows,
)
else:
return render_template('page_main.html.j2',
selected_form = "frag_form_delete.html.j2",
field_names = ["id", "name"],
rows = rows,
)
# Utils
def cast_to_value(field: str, str_value: str) -> Value | None:
str_value = str_value.strip()
if str_value == "": return None
if str_value[0] == "\"":
if str_value[-1] != "\"": raise ValueError(f"Invalid string: {str_value}")
str_value = str_value[1:-1]
field_index = db_fields.index(field)
if field_index == -1: raise ValueError(f"Field '{field}' not found")
type = db_types[field_index]
match type:
case "int": return Value.int(int(str_value))
case "string": return Value.string(str_value)
case _: raise ValueError(f"Unsupported type: {type}")
def value_to_str(value: Value) -> str:
match value.kind():
case log_db.VALUE_INT: return f"{str(value.as_int())} (int)"
case log_db.VALUE_STRING: return f"\"{value.as_string()}\" (string)"
case log_db.VALUE_DECIMAL: return f"{value.as_decimal()} (decimal)"
case log_db.VALUE_BYTES: return f"{value.as_bytes()} (bytes)"
case log_db.VALUE_NULL: return "null"
case _: raise ValueError(f"Unsupported value kind: {value.kind()}")
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