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app.py

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+import cohere
+import streamlit as st
+from streamlit.components.v1 import html
+from streamlit_extras.stylable_container import stylable_container
+import re
+import urllib.parse
+
+st.title("Cohere Chat UI")
+
+if "api_key" not in st.session_state:
+    api_key = st.text_input("Enter your API Key", type="password")
+    if api_key:
+        if api_key.isascii():
+            st.session_state.api_key = api_key
+            client = cohere.Client(api_key=api_key)
+            st.rerun()
+        else:
+            st.warning("Please enter your API key correctly.")
+            st.stop()
+    else:
+        st.warning("Please enter your API key to use the app. You can obtain your API key from here: https://dashboard.cohere.com/api-keys")
+        st.stop()
+else:
+    client = cohere.Client(api_key=st.session_state.api_key)
+
+if "messages" not in st.session_state:
+    st.session_state.messages = []
+
+def get_ai_response(prompt, chat_history):
+    st.session_state.is_streaming = True
+    st.session_state.response = ""
+    
+    with st.chat_message("ai", avatar=st.session_state.assistant_avatar):
+        penalty_kwargs = {
+            "frequency_penalty" if penalty_type == "Frequency Penalty" else "presence_penalty": penalty_value
+        }
+        
+        stream = client.chat_stream(
+            message=prompt,
+            model=model,
+            preamble=preamble,
+            chat_history=chat_history,
+            temperature=temperature,
+            k=k,
+            p=p,
+            **penalty_kwargs
+        )
+
+        placeholder = st.empty()
+
+        with stylable_container(
+            key="stop_generating",
+            css_styles="""
+                button {
+                    position: fixed;
+                    bottom: 100px;
+                    left: 50%;
+                    transform: translateX(-50%);
+                    z-index: 1;
+                }
+                """,
+        ):
+            st.button("Stop generating")
+
+        shown_message = ""
+        
+        for event in stream:
+            if event.event_type == "text-generation":
+                content = event.text
+                st.session_state.response += content
+                shown_message += content.replace("\n", "  \n")\
+                                        .replace("<", "\\<")\
+                                        .replace(">", "\\>")
+                placeholder.markdown(shown_message)
+
+    st.session_state.is_streaming = False
+    return st.session_state.response
+
+def normalize_code_block(match):
+    return match.group(0).replace("  \n", "\n")\
+                         .replace("\\<", "<")\
+                         .replace("\\>", ">")
+
+def normalize_inline(match):
+    return match.group(0).replace("\\<", "<")\
+                         .replace("\\>", ">")
+
+code_block_pattern = r"(```.*?```)"
+inline_pattern = r"`([^`\n]+?)`"
+
+def display_messages():
+    for i, message in enumerate(st.session_state.messages):
+        name = "user" if message["role"] == "USER" else "ai"
+        avatar = st.session_state.user_avatar if message["role"] == "USER" else st.session_state.assistant_avatar
+        with st.chat_message(name, avatar=avatar):
+            shown_message = message["text"].replace("\n", "  \n")\
+                                           .replace("<", "\\<")\
+                                           .replace(">", "\\>")
+            if "```" in shown_message:
+                # Replace "  \n" with "\n" within code blocks
+                shown_message = re.sub(code_block_pattern, normalize_code_block, shown_message, flags=re.DOTALL)
+            if "`" in shown_message:
+                shown_message = re.sub(inline_pattern, normalize_inline, shown_message)
+            st.markdown(shown_message)
+            
+            col1, col2, col3, col4 = st.columns([1, 1, 1, 1])
+            with col1:
+                if st.button("Edit", key=f"edit_{i}_{len(st.session_state.messages)}"):
+                    st.session_state.edit_index = i
+                    st.rerun()
+            with col2:
+                if st.session_state.is_delete_mode and st.button("Delete", key=f"delete_{i}_{len(st.session_state.messages)}"):
+                    del st.session_state.messages[i]
+                    st.rerun()
+            with col3:
+                text_to_copy = message["text"]
+                # Encode the string to escape
+                text_to_copy_escaped = urllib.parse.quote(text_to_copy)
+
+                copy_button_html = f"""
+                <button id="copy-msg-btn-{i}" style='font-size: 1em; padding: 0.5em;' onclick='copyMessage("{i}")'>Copy</button>
+                
+                <script>
+                function copyMessage(index) {{
+                    navigator.clipboard.writeText(decodeURIComponent("{text_to_copy_escaped}"));
+                    let copyBtn = document.getElementById("copy-msg-btn-" + index);
+                    copyBtn.innerHTML = "Copied!";
+                    setTimeout(function(){{ copyBtn.innerHTML = "Copy"; }}, 2000);
+                }}
+                </script>
+                """
+                html(copy_button_html, height=50)
+
+            if i == len(st.session_state.messages) - 1 and message["role"] == "CHATBOT":
+                with col4:
+                    if st.button("Retry", key=f"retry_{i}_{len(st.session_state.messages)}"):
+                        if len(st.session_state.messages) >= 2:
+                            del st.session_state.messages[-1]
+                            st.session_state.retry_flag = True
+                            st.rerun()
+        
+        if "edit_index" in st.session_state and st.session_state.edit_index == i:
+            with st.form(key=f"edit_form_{i}_{len(st.session_state.messages)}"):
+                new_content = st.text_area("Edit message", height=200, value=st.session_state.messages[i]["text"])
+                col1, col2 = st.columns([1, 1])
+                with col1:
+                    if st.form_submit_button("Save"):
+                        st.session_state.messages[i]["text"] = new_content
+                        del st.session_state.edit_index
+                        st.rerun()
+                with col2:
+                    if st.form_submit_button("Cancel"):
+                        del st.session_state.edit_index
+                        st.rerun()
+
+# Add sidebar for advanced settings
+with st.sidebar:
+    settings_tab, appearance_tab = st.tabs(["Settings", "Appearance"])
+
+    with settings_tab:
+        st.markdown("Help (Japanese): https://rentry.org/9hgneofz")
+    
+        # Copy Conversation History button
+        log_text = ""
+        for message in st.session_state.messages:
+            if message["role"] == "USER":
+                log_text += "<USER>\n"
+                log_text += message["text"] + "\n\n"
+            else:
+                log_text += "<ASSISTANT>\n"
+                log_text += message["text"] + "\n\n"
+        log_text = log_text.rstrip("\n")
+            
+        # Encode the string to escape
+        log_text_escaped = urllib.parse.quote(log_text)
+    
+        copy_log_button_html = f"""
+        <button id="copy-log-btn" style='font-size: 1em; padding: 0.5em;' onclick='copyLog()'>Copy Conversation History</button>
+        
+        <script>
+        function copyLog() {{
+            navigator.clipboard.writeText(decodeURIComponent("{log_text_escaped}"));
+            let copyBtn = document.getElementById("copy-log-btn");
+            copyBtn.innerHTML = "Copied!";
+            setTimeout(function(){{ copyBtn.innerHTML = "Copy Conversation History"; }}, 2000);
+        }}
+        </script>
+        """
+        html(copy_log_button_html, height=50)
+
+        if st.session_state.get("is_history_shown") != True:
+            if st.button("Display History as Code Block"):
+                st.session_state.is_history_shown = True
+                st.rerun()
+        else:
+            if st.button("Hide History"):
+                st.session_state.is_history_shown = False
+                st.rerun()
+            st.code(log_text)
+    
+        st.session_state.is_delete_mode = st.toggle("Enable Delete button")
+        
+        st.header("Advanced Settings")
+        model = st.selectbox("Model", options=["command-r-plus", "command-r"], index=0)
+        preamble = st.text_area("Preamble", height=200)
+        temperature = st.slider("Temperature", min_value=0.0, max_value=1.0, value=0.3, step=0.1)
+        k = st.slider("Top-K", min_value=0, max_value=500, value=0, step=1)
+        p = st.slider("Top-P", min_value=0.01, max_value=0.99, value=0.75, step=0.01)
+        penalty_type = st.selectbox("Penalty Type", options=["Frequency Penalty", "Presence Penalty"])
+        penalty_value = st.slider("Penalty Value", min_value=0.0, max_value=1.0, value=0.0, step=0.1)
+    
+        st.header("Restore History")
+        history_input = st.text_area("Paste conversation history:", height=200)
+        if st.button("Restore History"):
+            st.session_state.messages = []
+            messages = re.split(r"^(<USER>|<ASSISTANT>)\n", history_input, flags=re.MULTILINE)
+            role = None
+            text = ""
+            for message in messages:
+                if message.strip() in ["<USER>", "<ASSISTANT>"]:
+                    if role and text:
+                        st.session_state.messages.append({"role": role, "text": text.strip()})
+                        text = ""
+                    role = "USER" if message.strip() == "<USER>" else "CHATBOT"
+                else:
+                    text += message
+            if role and text:
+                st.session_state.messages.append({"role": role, "text": text.strip()})
+            st.rerun()
+    
+        st.header("Clear History")
+        if st.button("Clear Chat History"):
+            st.session_state.messages = []
+            st.rerun()
+        
+        st.header("Change API Key")
+        new_api_key = st.text_input("Enter new API Key", type="password")
+        if st.button("Update API Key"):
+            if new_api_key and new_api_key.isascii():
+                st.session_state.api_key = new_api_key
+                client = cohere.Client(api_key=new_api_key)
+                st.success("API Key updated successfully!")
+            else:
+                st.warning("Please enter a valid API Key.")
+                
+    with appearance_tab:
+        st.header("Font Selection")
+        font_options = {
+            "Zen Maru Gothic": "Zen Maru Gothic",
+            "Noto Sans JP": "Noto Sans JP",
+            "Sawarabi Mincho": "Sawarabi Mincho"
+        }
+        selected_font = st.selectbox("Choose a font", ["Default"] + list(font_options.keys()))
+        
+        st.header("Change the font size")
+        st.session_state.font_size  = st.slider("Font size", min_value=16.0, max_value=50.0, value=16.0, step=1.0)
+        
+        st.header("Change the user's icon")
+        st.session_state.user_avatar = st.file_uploader("Choose an image", type=["png", "jpg", "jpeg", "webp", "gif", "bmp", "svg",], key="user_avatar_uploader")
+    
+        st.header("Change the assistant's icon")
+        st.session_state.assistant_avatar = st.file_uploader("Choose an image", type=["png", "jpg", "jpeg", "webp", "gif", "bmp", "svg",], key="assistant_avatar_uploader")
+
+        st.header("Change the icon size")
+        st.session_state.avatar_size  = st.slider("Icon size", min_value=2.0, max_value=20.0, value=2.0, step=0.2)
+
+
+# After Stop generating
+if st.session_state.get("is_streaming"):
+    st.session_state.messages.append({"role": "CHATBOT", "text": st.session_state.response})
+    st.session_state.is_streaming = False
+    if "retry_flag" in st.session_state and st.session_state.retry_flag:
+        st.session_state.retry_flag = False
+    st.rerun()
+
+if selected_font != "Default":
+    with open("style.css") as css:
+        st.markdown(f'<style>{css.read()}</style>', unsafe_allow_html=True)
+    st.markdown(f'<style>body * {{ font-family: "{font_options[selected_font]}", serif !important; }}</style>', unsafe_allow_html=True)
+
+# Change font size
+st.markdown(f'<style>[data-testid="stChatMessageContent"] .st-emotion-cache-cnbvxy p{{font-size: {st.session_state.font_size}px;}}</style>', unsafe_allow_html=True)
+
+# Change icon size
+# (CSS element names may be subject to change.)
+# (Contributor: ★31 >>538)
+AVATAR_SIZE_STYLE = f"""
+                <style>
+                    [data-testid="chatAvatarIcon-user"] {{
+                        width: {st.session_state.avatar_size}rem;
+                        height: {st.session_state.avatar_size}rem;
+                    }}
+                    [data-testid="chatAvatarIcon-assistant"] {{
+                        width: {st.session_state.avatar_size}rem;
+                        height: {st.session_state.avatar_size}rem;
+                    }}
+                    [data-testid="stChatMessage"] .st-emotion-cache-1pbsqtx {{
+                        width: {st.session_state.avatar_size / 1.6}rem;
+                        height: {st.session_state.avatar_size / 1.6}rem;
+                    }}
+                    [data-testid="stChatMessage"] .st-emotion-cache-p4micv {{
+                        width: {st.session_state.avatar_size}rem;
+                        height: {st.session_state.avatar_size}rem;
+                    }}
+                </style>
+"""
+st.markdown(AVATAR_SIZE_STYLE, unsafe_allow_html=True)
+
+display_messages()
+
+# After Retry
+if st.session_state.get("retry_flag"):
+    if len(st.session_state.messages) > 0:
+        prompt = st.session_state.messages[-1]["text"]
+        messages = st.session_state.messages[:-1].copy()
+        response = get_ai_response(prompt, messages)
+        st.session_state.messages.append({"role": "CHATBOT", "text": response})
+        st.session_state.retry_flag = False
+        st.rerun()
+    else:
+        st.session_state.retry_flag = False
+
+if prompt := st.chat_input("Enter your message here..."):
+    chat_history = st.session_state.messages.copy()
+    
+    shown_message = prompt.replace("\n", "  \n")\
+                          .replace("<", "\\<")\
+                          .replace(">", "\\>")
+
+    with st.chat_message("user", avatar=st.session_state.user_avatar):
+        st.write(shown_message)
+    
+    st.session_state.messages.append({"role": "USER", "text": prompt})
+    
+    response = get_ai_response(prompt, chat_history)
+    
+    st.session_state.messages.append({"role": "CHATBOT", "text": response})
+    st.rerun()

requirements.txt

@@ -0,0 +1,2 @@
+cohere
+streamlit-extras

style.css

@@ -0,0 +1,8 @@
+@import url('https://fonts.googleapis.com/css2?family=Zen+Maru+Gothic&display=swap');
+@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP&display=swap');
+@import url('https://fonts.googleapis.com/css2?family=Sawarabi+Mincho&display=swap');
+
+body * {
+    font-weight: 400;
+    font-style: normal;
+}