zai-rs 0.5.1

一个 Rust SDK, 用于调用 智谱AI API
Documentation 
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use serde::Serialize;
use validator::Validate;

use super::{
    super::traits::*,
    image_request::{ImageGenBody, ImageQuality, ImageSize},
};
use crate::client::ZaiClient;

/// Typed builder for an image-generation request sent through a [`ZaiClient`].
pub struct ImageGenRequest<N>
where
    N: ModelName + ImageGen + Serialize,
{
    /// Request body
    body: ImageGenBody<N>,
}

impl<N> ImageGenRequest<N>
where
    N: ModelName + ImageGen + Serialize,
{
    /// Create a new image generation request for the given model.
    pub fn new(model: N) -> Self {
        let body = ImageGenBody {
            model,
            prompt: None,
            quality: None,
            size: None,
            watermark_enabled: None,
            user_id: None,
        };
        Self { body }
    }

    /// Mutable access to inner body (for advanced customizations)
    pub fn body_mut(&mut self) -> &mut ImageGenBody<N> {
        &mut self.body
    }

    /// Set prompt text
    pub fn with_prompt(mut self, prompt: impl Into<String>) -> Self {
        self.body.prompt = Some(prompt.into());
        self
    }

    /// Set image quality
    pub fn with_quality(mut self, quality: ImageQuality) -> Self {
        self.body.quality = Some(quality);
        self
    }

    /// Set image size
    pub fn with_size(mut self, size: ImageSize) -> Self {
        self.body.size = Some(size);
        self
    }

    /// Enable/disable watermark
    pub fn with_watermark_enabled(mut self, watermark_enabled: bool) -> Self {
        self.body.watermark_enabled = Some(watermark_enabled);
        self
    }

    /// Set user id
    pub fn with_user_id(mut self, user_id: impl Into<String>) -> Self {
        self.body.user_id = Some(user_id.into());
        self
    }

    /// Validate body constraints: required prompt and (when set) a valid
    /// custom image size.
    pub fn validate(&self) -> crate::ZaiResult<()> {
        // Body-level field validations
        self.body
            .validate()
            .map_err(|e| crate::client::error::ZaiError::ApiError {
                code: crate::client::error::codes::SDK_VALIDATION,
                message: format!("Validation error: {e:?}"),
            })?;
        // Require prompt
        if self
            .body
            .prompt
            .as_deref()
            .map(|s| s.trim().is_empty())
            .unwrap_or(true)
        {
            return Err(crate::client::error::ZaiError::ApiError {
                code: crate::client::error::codes::SDK_VALIDATION,
                message: "prompt is required".to_string(),
            });
        }
        // Validate custom size when present
        if let Some(size) = &self.body.size
            && let super::image_request::ImageSize::Custom { .. } = size
            && !size.is_valid()
        {
            return Err(crate::client::error::ZaiError::ApiError {
                        code: crate::client::error::codes::SDK_VALIDATION,
                        message: "invalid custom image size: must be 512..=2048, divisible by 16, and <= 2^21 pixels".to_string(),
                    });
        }
        Ok(())
    }

    /// Submit the request via a [`ZaiClient`] and parse the typed
    /// image-generation response.
    pub async fn send_via(
        &self,
        client: &ZaiClient,
    ) -> crate::ZaiResult<super::image_response::ImageResponse>
    where
        N: serde::Serialize,
    {
        self.validate()?;
        let route = crate::client::routes::IMAGES_GENERATE;
        let url = client.endpoints().resolve_route(route, &[])?;
        client
            .send_json::<_, super::image_response::ImageResponse>(route.method(), url, &self.body)
            .await
    }
}