ed2k.github.io/brython.html at master · ed2k/ed2k.github.io · GitHub

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<script src="https://code.jquery.com/jquery-3.5.1.slim.min.js">
</script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/brython/3.9.5/brython.min.js">
</script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/brython/3.9.5/brython_stdlib.min.js">
</script>
</head>
<body onload="brython()">
<textarea id='myinput'></textarea>
<button id="myupdate">submit</button>
<div id='myoutput'></div>
<div id='zone_kv'>kv list here</div>
<div id='db_table'>db table here</div>
<script type="text/python">

from browser import document, html
from browser import ajax

url = "http://localhost:5000/api/update"

def complete2(request):
    data = request.json
    document["myoutput"].text = data['data']

def click(event):
    headers = { 'Content-Type': 'application/json; charset=utf-8' };
    print(document['myinput'].value)
    import javascript
    data = javascript.JSON.stringify(dict(doc=document['myinput'].value))
    ajax.post(url, headers=headers, data=data, oncomplete=complete2)
    document["myoutput"].text = "waiting..."

document["myupdate"].bind("click", click)

# ------------------------
from browser import document, window
from browser.html import TABLE, TR, TD, INPUT, BUTTON, PRE, TEXTAREA

zone = document["zone_kv"]
search_kv = "graph"
"""Test if the browser supports local storage"""
try:
    storage = window.localStorage
    storage.setItem("x", "x")
    storage.removeItem("x")
except:
    storage = None

def action_kv_delete(ev):
    """User clicked on "remove" button"""
    button = ev.target
    row = button.closest("TR")
    key = row.get(selector="TD")[0].text
    storage.removeItem(key)
    # refresh table
    show_kv()

def action_kv_add_search(ev):
    """User clicked on "add" or "search" button"""
    global search_kv
    button = ev.target

    if button.text == 'Search':
        row = button.closest("TR")
        print('search', search_kv)
        search_kv = document['search_kv'].value
        search_kv = search_kv.strip()
    else:
        key = document['search_kv'].value
        value = document['note_kv'].value
        if key.strip():
            storage.setItem(key, value)
    # refresh table
    show_kv()

def update_kv(ev):
    """If a value field has been modified, update storage"""
    row = ev.target.closest("TR")
    key = row.get(selector="TD")[0].text
    value = row.get(selector="INPUT")[0].value
    storage.setItem(key, value)

def show_kv(*args):
    """Shows the data stored locally, add buttons to add / remove items"""
    zone.clear()

    if storage is None:
        zone <= "No local storage for this browser"
        return

    table = TABLE()

    btn_add = BUTTON("add", Class="btn-ls")
    btn_search = BUTTON("Search",Class="btn-ls")
    btn_add.bind('click', action_kv_add_search)
    btn_search.bind('click', action_kv_add_search)
    table <= TR(TD(INPUT(id='search_kv', value=search_kv)) +
        TD(btn_add + btn_search))
    table <= TR(TEXTAREA(id='note_kv'))

    for i in range(storage.length):
        key = storage.key(i)
        value = storage.getItem(key)
        if len(search_kv) > 2 and (search_kv in key or search_kv in value):
            value_field = PRE(value, style=dict(width=800))
            # value_field.bind("change", update_kv)
            btn = BUTTON("remove", Class="btn-ls")
            btn.bind('click', action_kv_delete)
            table <= TR(TD(key) + TD(btn))
            table <= TR(value_field)

    zone <= table


show_kv()

# ------------------------
# indexd DB for entity relationship graph
from browser import document, window, html
IDB = window.indexedDB
search_terms = {}

def create_db(*args):
      # The database did not previously exist, so create object stores and indexes.
      print('create db')
      db = dbreq.result
      store = db.createObjectStore("eb", {"keyPath": "eb"})
      entityIndex = store.createIndex("by_entity", "entity")
      relationIndex = store.createIndex("by_relation", "relation")
      print('db scrture')
      # Populate with initial data.
      store.put({"entity": "cap-backend", "relation": "down stream", "eb": "PCAP"})
      store.put({"entity": "cap-backend", "relation": "up stream", "eb": "hp-ep-mt"})


def btn_click(ev):
    """Generic callback function for buttons
    """
    global search_terms
    # The text on the button indicates the action: Add, Edit, Update or Delete
    action = ev.target.text

    # table row of the clicked button
    row = ev.target.parent.parent

    if action == "Delete":
        db = dbreq.result
        tx = db.transaction("eb", "readwrite")
        store = tx.objectStore("eb")
        cursor = store.delete(row.key)

        # when record is deleted, update table
        cursor.bind("success", show)

    elif action == "Add":
        values = [entry.value for entry in row.get(selector="INPUT")]
        data = dict(zip(['entity', 'relation', 'eb'], values))
        db = dbreq.result
        tx = db.transaction("eb", "readwrite")
        store = tx.objectStore("eb")
        if action == "Add":
            cursor = store.put(data)
        else:
            cursor = store.put(data, row.key)
        search_terms = data
        # when record is added, update table
        cursor.bind("success", show_db)

    elif action == "Edit":
        # Replace cells for "entity" and "author" by INPUT fields
        # Since isbn is he keyPath it can't be edited
        cells = row.get(selector="TD")
        for cell in cells[:-2]:
            value = cell.text
            cell.clear()
            cell <= html.INPUT(value=value)

        # Replace buttons "Edit" and "Delete" by button "Update"
        cells[-1].clear()
        update_btn = html.BUTTON("Update")
        cells[-1] <= update_btn

        # Bind its "click" event
        update_btn.bind("click", btn_click)

    elif action == "Update":
        values = [entry.value for entry in row.select("INPUT")]
        data = dict(zip(["entity", "relation"], values))
        data['eb'] = row.key # required for the "store.put" method below

        db = dbreq.result
        tx = db.transaction("eb", "readwrite")
        store = tx.objectStore("eb")
        cursor = store.put(data)

        # When record is updated, update table
        cursor.bind("success", show)
    elif action == 'Search':
        values = [entry.value for entry in row.get(selector="INPUT")]
        search_terms = dict(zip(['entity', 'relation', 'eb'], values))
        print('search', values, search_terms)
        db = dbreq.result
        tx = db.transaction("eb", "readonly")
        store = tx.objectStore("eb")
        cursor = store.openCursor()
        cursor.bind("success", show_db)

def show_db(ev):
    """Show the contents of store "eb" in a table"""
    print('show db')
    db = dbreq.result
    tx = db.transaction("eb", "readonly")
    store = tx.objectStore("eb")
    cursor = store.openCursor()

    # clear table
    document["db_table"].clear()

    # headers
    t = html.TABLE()
    document["db_table"] <= t

    t <= html.TR(html.TH(x) for x in ["Entity", "relation", "Entity", "Actions"])

    def add_row(ev):
        """Add a row to the table for each iteration on cursor
        When cursor in empty, add a line for new record insertion
        """
        print('add row')
        res = ev.target.result
        if res:
            v = res.value
            toShow = False
            for key in ["entity", "relation", "eb"]:
                print(search_terms.get(key), getattr(v, key))
                if search_terms.get(key) and search_terms[key] == getattr(v, key):
                    toShow = True
                    break
            if toShow:
                row = html.TR()
                row <= (html.TD(getattr(v, key))
                    for key in ["entity", "relation", "eb"])
                row <= html.TD(html.BUTTON("Edit")+
                    html.BUTTON("Delete"))
                row.key = res.key
                t <= row
            getattr(res, "continue")()
        else:
            # add empty row
            print('empty row')
            row = html.TR()
            row <= (html.TD(html.INPUT(name="new_%s" %key))
                for key in ["entity", "relation", "eb"])
            row <= html.TD(html.BUTTON("Add")+
                html.BUTTON("Search"))
            t <= row
            # bind all buttons
            for btn in t.get(selector="BUTTON"):
                btn.bind("click", btn_click)

    cursor.bind("success", add_row)


dbreq = IDB.open("library")

# If database doesn't exist, create it
dbreq.bind("upgradeneeded", create_db)

# Else print a table with all elements in table "books"
dbreq.bind("success", show_db)

</script>
</body>