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1 | 1 | use crate::revision::{TrashRevision, WorkspaceRevision}; |
2 | | -use serde::{Deserialize, Serialize}; |
| 2 | +use serde::de::{MapAccess, Visitor}; |
| 3 | +use serde::{de, Deserialize, Deserializer, Serialize}; |
| 4 | +use std::fmt; |
3 | 5 | use std::sync::Arc; |
4 | 6 |
|
5 | | -#[derive(Debug, Default, Deserialize, Serialize, Clone, Eq, PartialEq)] |
| 7 | +#[derive(Debug, Default, Serialize, Clone, Eq, PartialEq)] |
6 | 8 | pub struct FolderRevision { |
7 | 9 | pub workspaces: Vec<Arc<WorkspaceRevision>>, |
8 | 10 | pub trash: Vec<Arc<TrashRevision>>, |
9 | 11 | } |
| 12 | + |
| 13 | +impl<'de> Deserialize<'de> for FolderRevision { |
| 14 | + fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
| 15 | + where |
| 16 | + D: Deserializer<'de>, |
| 17 | + { |
| 18 | + struct FolderVisitor<'a>(&'a mut Option<FolderRevision>); |
| 19 | + impl<'de, 'a> Visitor<'de> for FolderVisitor<'a> { |
| 20 | + type Value = (); |
| 21 | + fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
| 22 | + formatter.write_str("Expect struct FolderRevision") |
| 23 | + } |
| 24 | + |
| 25 | + fn visit_map<A>(self, mut map: A) -> Result<Self::Value, A::Error> |
| 26 | + where |
| 27 | + A: MapAccess<'de>, |
| 28 | + { |
| 29 | + let f = |map: &mut A, |
| 30 | + workspaces: &mut Option<Vec<WorkspaceRevision>>, |
| 31 | + trash: &mut Option<Vec<TrashRevision>>| match map.next_key::<String>() |
| 32 | + { |
| 33 | + Ok(Some(key)) => { |
| 34 | + if key == "workspaces" && workspaces.is_none() { |
| 35 | + *workspaces = Some(map.next_value::<Vec<WorkspaceRevision>>().ok()?); |
| 36 | + } |
| 37 | + if key == "trash" && trash.is_none() { |
| 38 | + *trash = Some(map.next_value::<Vec<TrashRevision>>().ok()?); |
| 39 | + } |
| 40 | + Some(()) |
| 41 | + } |
| 42 | + Ok(None) => None, |
| 43 | + Err(_e) => None, |
| 44 | + }; |
| 45 | + |
| 46 | + let mut workspaces: Option<Vec<WorkspaceRevision>> = None; |
| 47 | + let mut trash: Option<Vec<TrashRevision>> = None; |
| 48 | + while f(&mut map, &mut workspaces, &mut trash).is_some() { |
| 49 | + if workspaces.is_some() && trash.is_some() { |
| 50 | + break; |
| 51 | + } |
| 52 | + } |
| 53 | + |
| 54 | + *self.0 = Some(FolderRevision { |
| 55 | + workspaces: workspaces.unwrap_or_default().into_iter().map(Arc::new).collect(), |
| 56 | + trash: trash.unwrap_or_default().into_iter().map(Arc::new).collect(), |
| 57 | + }); |
| 58 | + Ok(()) |
| 59 | + } |
| 60 | + } |
| 61 | + |
| 62 | + let mut folder_rev: Option<FolderRevision> = None; |
| 63 | + const FIELDS: &[&str] = &["workspaces", "trash"]; |
| 64 | + let _ = serde::Deserializer::deserialize_struct( |
| 65 | + deserializer, |
| 66 | + "FolderRevision", |
| 67 | + FIELDS, |
| 68 | + FolderVisitor(&mut folder_rev), |
| 69 | + ); |
| 70 | + |
| 71 | + match folder_rev { |
| 72 | + None => Err(de::Error::missing_field("workspaces or trash")), |
| 73 | + Some(folder_rev) => Ok(folder_rev), |
| 74 | + } |
| 75 | + } |
| 76 | +} |
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