4 files changed, 651 insertions, 0 deletions

diff --git a/src/groups/group.rs b/src/groups/group.rs
new file mode 100644
index 0000000..d7f2fbf
--- /dev/null
+++ b/src/groups/group.rs
@@ -0,0 +1,357 @@
+use std::{str::FromStr, path::PathBuf};
+
+use nostr::{EventId, secp256k1::XOnlyPublicKey, prelude::UncheckedUrl, Tag, Event};
+use nostr_sdk::{Timestamp, Keys};
+
+use crate::{utils::load_event, ngit_tag::{tag_extract_value_as_event_id, tag_extract_relays, tag_is_group, tag_group_with_relays}};
+
+use super::{init::{InitializeGroup, self}};
+
+/// [`Group`] error
+#[derive(Debug, thiserror::Error)]
+pub enum Error {
+    /// Error processing initialisation group content json - incorrect format?
+    #[error("group cannot be initialised from content: {0}")]
+    InitializeJson(#[from] init::Error),
+    /// Error group is not avialable locally in .ngit
+    #[error("group is not available in .ngit/groups/{0}.json")]
+    GroupJsonNotAvailable(String),
+}
+
+#[derive(Eq, PartialEq, Clone)]
+pub struct StartFinish {
+    pub start:Timestamp,
+    pub finish: Option<Timestamp>,
+}
+
+struct MembershipDetails {
+    pub id:EventId,
+    pub dates: Vec<StartFinish>,
+    pub relays: Vec<UncheckedUrl>,
+}
+pub struct MembershipCollection {
+    collection:Vec<MembershipDetails>,
+}
+impl MembershipCollection {
+    pub fn new() -> Self {
+        Self {
+            collection: vec![],
+        }
+    }
+    pub fn add_group_dates(
+        &mut self,
+        group_tag:Tag,
+        start_finish:StartFinish,
+    ) {
+        
+        if !tag_is_group(&group_tag) {
+            panic!("tag supplied to add_group_dates isn't a group tag");
+        }
+
+        match self.collection.iter_mut().find(
+            |g| tag_extract_value_as_event_id(&group_tag).eq(&g.id)
+        ) {
+            None => {
+                self.collection.push(
+                    MembershipDetails { 
+                        id: tag_extract_value_as_event_id(&group_tag),
+                        dates: vec![
+                            start_finish
+                        ],
+                        relays: tag_extract_relays(&group_tag),
+                    }
+                );
+            },
+            Some(group_dates_relays) => {
+                match group_dates_relays.dates.iter().find(
+                    |d| start_finish.eq(&d)
+                ) {
+                    None => group_dates_relays.dates.push(start_finish),
+                    Some(_) => (),
+                }
+            }
+        }    
+    }
+
+    pub fn get_first_active_group(&self) -> Option<&EventId> {
+        let a = self.get_active_groups();
+        if a.is_empty() { None }
+        else { Some(a[0]) }
+    }
+
+    pub fn get_active_groups(&self) -> Vec<&EventId> {
+        let mut active = vec![];
+        for m in &self.collection {
+            if m.dates.iter().any(|sf| sf.finish.is_none()) {
+                active.push(&m.id);
+            }
+        }
+        active
+    }
+}
+
+pub struct PubKeyDates {
+    pubkey:XOnlyPublicKey,
+    dates: Vec<StartFinish>,
+}
+
+pub struct Group {
+    pub id: EventId,
+    name:Option<String>,
+    about:Option<String>,
+    picture:Option<String>,
+    pub relays:Vec<String>,
+    direct_members: Vec<PubKeyDates>,
+    member_groups:MembershipCollection,
+    indirect_member_groups:MembershipCollection,
+    admin_group:MembershipCollection,
+    indirect_admin_groups:MembershipCollection,
+    pub events:Vec<Event>,
+    hash: String, // hash of event IDs that make up this state
+}
+
+impl Group {
+
+    pub fn new(init:&InitializeGroup, keys:&Keys) -> Result<Self,Error> {
+        let event = init.initialize(&keys);
+        Group::new_from_event(event)
+    }
+
+    pub fn new_from_json_event(json_string:String) -> Result<Self,Error> {
+        let event = Event::from_json(json_string)
+            .expect("json_string to be formated as event");
+        Group::new_from_event(event)
+    }
+
+    pub fn open (group_id:String, repo_dir_path:&PathBuf) -> Result<Self,Error> {
+        let path = repo_dir_path.join(
+            format!(".ngit/groups/{}.json",group_id)
+        );
+        if path.exists() {
+            Ok(
+                Group::new_from_event(
+                    load_event(path)
+                        .expect("group event in json to be well formatted as a group event"),
+                )
+                    .expect("file content at path to be a well formated group event")
+            )
+        }
+        else {
+            Err(Error::GroupJsonNotAvailable(group_id))
+        }
+    }
+
+    pub fn new_from_event(event:Event) -> Result<Self,Error> {
+        match InitializeGroup::from_json(&event.content) {
+            Err(e) => return Err(Error::InitializeJson(e)),
+            Ok(g) => {
+                let start_finish = StartFinish { start: event.created_at, finish: None };
+                let mut direct_members: Vec<PubKeyDates> = vec![];
+                // add direct_members
+                for m in g.direct_members {
+                    let key = XOnlyPublicKey::from_str(m.as_str());
+                    match key {
+                        Ok(k) => direct_members.push(
+                            PubKeyDates { 
+                                pubkey: k, 
+                                dates: vec![
+                                    start_finish.clone(),
+                                ]
+                            },
+                        ),
+                        // could add pubkey to an invalid vector and report on it?
+                        Err(_) => (), 
+                    }
+                }
+                // add member groups
+                // let mut member_groups: Vec<GroupDatesRelays> = vec![];
+                let mut member_groups = MembershipCollection::new();
+                for m in g.member_groups {
+                    // let event_id_relay = EventIdRelays::from_tag(m);
+                    // member_groups.push(GroupDatesRelays { 
+                    //     id: event_id_relay.id,
+                    //     dates: vec![
+                    //         StartFinish { start: event.created_at, finish: None }
+                    //     ],
+                    //     relays: match event_id_relay.relay {
+                    //         None => vec![],
+                    //         Some(r) => vec![r],
+                    //     }
+                    // });
+                    // add_group_dates_to_vector(
+                    //     &mut member_groups,
+                    //     m,
+                    //     StartFinish { start: event.created_at, finish: None },
+                    // )
+                    member_groups.add_group_dates(
+                        m,
+                        start_finish.clone(),
+                    )
+                }
+                // add admin group
+                // let admin_group = match g.admin {
+                //     None => vec![],
+                //     Some(a) => match EventId::from_str(a.as_str()) {
+                //         Ok(id) => vec![
+                //             GroupDatesRelays {
+                //                 id,
+                //                 dates: vec![StartFinish {
+                //                     start: event.created_at.clone(),
+                //                     finish: None,
+                //                 }]
+                //             }
+                //         ],
+                //         // could report on it?
+                //         Err(_) => vec![], 
+                //     }
+                // };
+                let mut admin_group = MembershipCollection::new();
+                // let admin_group = vec![];
+                match g.admin {
+                    None => (),
+                    Some(t) => {
+                        admin_group.add_group_dates(
+                            t,
+                            start_finish.clone(),
+                        )
+                    }
+                }
+                Ok(Self {
+                    id: event.id,
+                    name: g.name,
+                    about: g.about,
+                    picture: g.picture,
+                    relays: g.relays,
+                    direct_members,
+                    admin_group,
+                    member_groups,
+                    indirect_member_groups: MembershipCollection::new(),
+                    indirect_admin_groups: MembershipCollection::new(),
+                    events:vec![event],
+                    hash: "hash".to_string(), // hash of event IDs that make up this state
+                })
+            }
+        }        
+    }
+
+    fn load_recurring_sub_groups() {
+
+    }
+
+    pub fn get_ref(&self) -> Tag {
+        tag_group_with_relays(
+            &self.id.to_string(),
+            &self.relays,
+        )
+    }
+
+    // fn add_member(&self,) -> Self;
+    // fn init(&self,keys:Keys) -> Event;
+    // fn remove_member() -> Self;
+    // fn set_admin(&self) -> Self;
+    // fn set_name(&self) -> Self;
+    // fn set_about(&self) -> Self;
+    // fn set_picture(&self) -> Self;
+
+    // use enums instead of having so many functions? then use a vector to store all the changes so they can be made in one event?
+
+    // fn new(
+    //     &self,
+    //     direct_members:Vec<String>,
+    //     sub_groups:String,
+    //     relays:Vec<String>,
+    //     name:String,
+    // ) -> Self {
+    //     // create initialation event
+    //     // EventBuilder::new(
+    //     //     100,
+
+    //     // )
+    //     self
+    // }
+
+    pub fn members(&self) -> Vec<&XOnlyPublicKey> {
+        let mut pubkeys = vec![];
+        for m in &self.direct_members {
+            pubkeys.push(&m.pubkey);
+        }
+        pubkeys
+    }
+
+    pub fn is_member(&self, pubkey: &XOnlyPublicKey) -> bool {
+        self.members().iter().any(|m| *pubkey == **m)
+    }
+    // pub fn admins(&self) -> Vec<&String> { get_el(&self.admins) }
+    // pub fn voters(&self) -> Vec<&String> { get_el(&self.voters) }
+    // pub fn members(&self) -> Vec<&String> { get_el(&self.members) }
+    // pub fn is_admin(&self, pubkey:&String) -> bool { is_el(&self.admins, &pubkey) }
+    // pub fn is_voter(&self, pubkey:&String) -> bool { is_el(&self.voters, &pubkey) }
+    // pub fn is_member(&self, pubkey:&String) -> bool { is_el(&self.members, &pubkey) }
+    // pub fn get_admins_at<'a>(&'a self, timestamp: &'a Timestamp) -> Vec<&String> { get_el_at(&self.admins,&timestamp) }
+    // pub fn get_voters_at<'a>(&'a self, timestamp: &'a Timestamp) -> Vec<&String> { get_el_at(&self.voters,&timestamp) }
+    // pub fn get_members_at<'a>(&'a self, timestamp: &'a Timestamp) -> Vec<&String> { get_el_at(&self.members,&timestamp) }
+    // pub fn was_admin_at(&self, pubkey:&String, timestamp: &Timestamp) -> bool { was_el_at(&self.admins, pubkey, &timestamp) }
+    // pub fn was_voter_at(&self, pubkey:&String, timestamp: &Timestamp) -> bool { was_el_at(&self.voters, pubkey, &timestamp) }
+    // pub fn was_members_at(&self, pubkey:&String, timestamp: &Timestamp) -> bool { was_el_at(&self.members, pubkey, &timestamp) }
+}
+
+// fn get_el(el:&Vec<PubKeyDates>) -> Vec<&String> {
+//     let mut current: Vec<&String> = vec![];
+//     for m in el {
+//         if m.dates.last().unwrap().finish.is_none() {
+//             current.push(&m.pubkey)
+//         }
+//     }
+//     current
+// }
+// fn is_el(el:&Vec<PubKeyDates>, pubkey:&String) -> bool {
+//     el
+//         .iter()
+//         .any(
+//             |m|
+//             &m.pubkey == pubkey
+//             && m.dates.last().unwrap().finish.is_none()
+//         )
+// }
+// fn get_el_at<'a>(el:&'a Vec<PubKeyDates>, timestamp: &'a Timestamp) -> Vec<&'a String> {
+//     let mut el_at_timestamp: Vec<&String> = vec![];
+//     for m in el {
+//         if m.dates
+//             .iter()
+//             .any(
+//                 |d|
+//                 &d.start < &timestamp
+//                 // && match &d.finish {
+//                 //     None => true,
+//                 //     _ => &d.finish.unwrap() > &timestamp
+//                 // }
+//                 && (
+//                     d.finish.is_none()
+//                     || &d.finish.unwrap() > &timestamp
+//                 )
+//             ) {
+//                 el_at_timestamp.push(&m.pubkey)
+//             }
+//     }
+//     el_at_timestamp
+// }
+// fn was_el_at(el:&Vec<PubKeyDates>, pubkey:&String,timestamp:&Timestamp) -> bool {
+//     // PublicKey::try_from_hex_string(pubkey);
+//     el
+//         .iter()
+//         .any(
+//             |m|
+//             &m.pubkey == pubkey
+//             && m.dates
+//                 .iter()
+//                 .any(
+//                     |d|
+//                     &d.start < &timestamp
+//                     && (
+//                         d.finish.is_none()
+//                         || &d.finish.unwrap() > &timestamp
+//                     )
+//                 )
+//         )
+// }
+
diff --git a/src/groups/groups.rs b/src/groups/groups.rs
new file mode 100644
index 0000000..3b837a7
--- /dev/null
+++ b/src/groups/groups.rs
@@ -0,0 +1,47 @@
+use std::fs;
+
+use nostr::EventId;
+
+use crate::{utils::load_file};
+
+use super::group::Group;
+
+pub struct Groups {
+    groups:Vec<Group>
+}
+impl Groups {
+    pub fn new() -> Self {
+
+        let cur_dir = std::env::current_dir().unwrap();
+        
+        // check for potential problems
+        let ngit_path = cur_dir.clone().join(".ngit");
+        if !ngit_path.is_dir() {
+            panic!("ngit not initialised. Run 'ngit init' first...");
+        }
+
+        let mut groups = vec![];
+
+        for dir_entry in fs::read_dir(ngit_path.join("groups"))
+            .expect("groups folder to exist and read_dir to read it")
+        {
+            groups.push(
+                Group::new_from_json_event(
+                    load_file(
+                        dir_entry
+                            .expect("DirEntry in read_dir should exist").path()
+                    )
+                        .expect("group json to load from file")
+                ).expect("group json to produce Group")
+            );
+        }
+
+        Self {
+            groups,
+        }
+    }
+
+    pub fn by_event_id(&self, id:&EventId) -> Option<&Group> {
+        self.groups.iter().find(|g| g.id == *id)
+    }
+}
\ No newline at end of file
diff --git a/src/groups/init.rs b/src/groups/init.rs
new file mode 100644
index 0000000..797d190
--- /dev/null
+++ b/src/groups/init.rs
@@ -0,0 +1,244 @@
+
+use std::{str::FromStr, fmt::Debug};
+use nostr_sdk::{EventBuilder, Tag, secp256k1::XOnlyPublicKey, Keys, Event};
+use serde::{Deserialize, Serialize};
+
+use crate::{kind::Kind, ngit_tag::{tag_extract_relays, tag_admin_group_with_relays, tag_extract_value, tag_hashtag, tag_into_event}};
+
+/// [`InitializeGroup`] error
+#[derive(Debug, thiserror::Error)]
+pub enum Error {
+    /// Error serializing or deserializing JSON data
+    #[error("json error: {0}")]
+    Json(#[from] serde_json::Error),
+    // /// Error adding wrong tag kind to member_groups
+    // #[error("expecting event tag for member_groups but got: {0}")]
+    // WongMemberGroupsTagKind(String),
+    // /// Error InvalidGroupIdInTag
+    // #[error("invalid group id in member_groups tag: {0}")]
+    // InvalidGroupIdInTag(String),
+}
+
+impl InitializeGroup {
+
+    pub fn initialize(&self,keys:&Keys) -> Event {
+        // let keys = Keys::generate();
+        EventBuilder::new(
+            Kind::InitializeGroup.into_sdk_custom_kind(),
+            self.as_json(),
+            &self.generate_tags(),
+        )
+        .to_unsigned_event(keys.public_key())
+        .sign(&keys)
+        .unwrap()
+    }
+
+    fn generate_tags(&self) -> Vec<Tag> {
+        let mut tags:Vec<Tag> = vec![
+            tag_hashtag("ngit-event"),
+            tag_hashtag("ngit-format-0.0.1"),
+        ];
+        for m in &self.direct_members {
+            let key = XOnlyPublicKey::from_str(m);
+            match key {
+                Ok(k) => tags.push(Tag::PubKey(k, None)),
+                Err(error) => print!("could not add this pubkey to tag: {m} error: {error}"),
+            }
+        }
+        for m in &self.member_groups {
+            tags.push(m.clone());
+            tags.push(tag_into_event(m.clone()));
+
+        }
+        match &self.admin {
+            None => (),
+            Some(admin) => { 
+                tags.push(tag_admin_group_with_relays(
+                    &tag_extract_value(admin),
+                    &tag_extract_relays(admin),
+                ));
+                tags.push(tag_into_event(admin.clone()));
+            },
+        };
+        tags
+    }
+}
+
+/// InitializeGroup
+#[derive(Debug, Clone, Eq, PartialEq, Ord, PartialOrd, Serialize, Deserialize)]
+pub struct InitializeGroup {
+    /// Name
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub name: Option<String>,
+    /// Description
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub about: Option<String>,
+    /// Picture
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub picture: Option<String>,
+    /// relays
+    pub relays: Vec<String>,
+    /// Direct Members
+    pub direct_members: Vec<String>,  
+    /// Member Groups as group tag vector
+    pub member_groups: Vec<Tag>, 
+    /// Admin
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub admin: Option<Tag>,
+
+}
+
+impl Default for InitializeGroup {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+impl InitializeGroup {
+    /// New empty [`InitializeGroup`]
+    pub fn new() -> Self {
+        Self {
+            name: None,
+            about: None,
+            picture: None,
+            relays: vec![],
+            direct_members: vec![],
+            member_groups: vec![],
+            admin: None,
+        }
+    }
+
+    /// Deserialize [`InitializeGroup`] from `JSON` string
+    pub fn from_json<S>(json: S) -> Result<Self, Error>
+    where
+        S: Into<String>,
+    {
+        Ok(serde_json::from_str(&json.into())?)
+    }
+
+    /// Serialize [`InitializeGroup`] to `JSON` string
+    pub fn as_json(&self) -> String {
+        serde_json::json!(self).to_string()
+    }
+
+    /// Set name
+    pub fn name<S>(self, name: S) -> Self
+    where
+        S: Into<String>,
+    {
+        Self {
+            name: Some(name.into()),
+            ..self
+        }
+    }
+
+    /// Set about
+    pub fn about<S>(self, about: S) -> Self
+    where
+        S: Into<String>,
+    {
+        Self {
+            about: Some(about.into()),
+            ..self
+        }
+    }
+
+    /// Set picture
+    pub fn picture<S>(self, picture: S) -> Self
+    where
+        S: Into<String>,
+    {
+        Self {
+            picture: Some(picture.into()),
+            ..self
+        }
+    }
+
+    /// Set relays
+    pub fn relays(mut self, relays: &Vec<String>) -> Self {
+        for m in relays {
+            self.relays.push(m.clone());
+        }
+        self
+    }
+
+    /// Set members
+    pub fn members(mut self, pubkeys: Vec<String>, group_refs:Vec<Tag>) -> Self /* Result<Self,Error>*/ {
+        for m in pubkeys {
+            let key = XOnlyPublicKey::from_str(m.as_str());
+            match key {
+                Ok(_k) => self.direct_members.push(m),
+                Err(error) => print!("could not add this pubkey to members: {m} error: {error}"),
+            }
+        }
+        for group_ref in group_refs {
+            self.member_groups.push(group_ref);
+        }
+        self
+    }
+
+    /// Set admin
+    pub fn admin(self, group_ref: Tag) -> Self {
+        Self {
+            admin: Some(group_ref),
+            ..self
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+
+    use nostr::prelude::UncheckedUrl;
+
+    use crate::ngit_tag::{tag_group_with_relays, tag_group};
+
+    use super::*;
+
+    #[test]
+    fn test_deserialize_content() {
+        let content = r#"{
+            "name":"myname",
+            "picture":"https://www.example.com/profile.jpg",
+            "direct_members":[
+                "88a14a0df1aa0223e9f3a44cd4964fb82a19590440bb8cf1610d8c7367798314",
+                "14c27d59268ae2554d03b89c5c01dac17a604b17ac258ad345bd0648d3f5c011"
+            ],
+            "member_groups":[
+                ["group","109ca9850488d301147ac92c6ea3e1d3dd3ebe3a59dcd1151e99c7e16ef48897","ws://localhost"],
+                ["group","06bd7667a7c115fd8faf7f300302f39c019e16e6461845930686b84fbeae8c87"]
+            ],
+            "relays":["wss://relay.damus.io","ws://localhost"],
+            "admin":["admin-group","109ca9850488d301147ac92c6ea3e1d3dd3ebe3a59dcd1151e99c7e16ef48897","ws://localhost"]
+        }"#;
+        assert_eq!(
+            InitializeGroup::from_json(content).unwrap(),
+            InitializeGroup::new()
+                .name("myname")
+                // 'about' intentionally ommitted
+                .picture("https://www.example.com/profile.jpg")
+                .members(
+                    vec![
+                        "88a14a0df1aa0223e9f3a44cd4964fb82a19590440bb8cf1610d8c7367798314".to_string(),
+                        "14c27d59268ae2554d03b89c5c01dac17a604b17ac258ad345bd0648d3f5c011".to_string(),
+                    ],
+                    vec![
+                        tag_group_with_relays(
+                            &"109ca9850488d301147ac92c6ea3e1d3dd3ebe3a59dcd1151e99c7e16ef48897".to_string(),
+                            &vec!["ws://localhost".to_string()],
+                        ),
+                        tag_group(
+                            &"06bd7667a7c115fd8faf7f300302f39c019e16e6461845930686b84fbeae8c87".to_string(),
+                        ),
+                    ],
+                )
+                .relays(&vec!["wss://relay.damus.io".to_string(),"ws://localhost".to_string()])
+                .admin(
+                    tag_admin_group_with_relays(
+                        &"109ca9850488d301147ac92c6ea3e1d3dd3ebe3a59dcd1151e99c7e16ef48897".to_string(),
+                        &vec![UncheckedUrl::from_str("ws://localhost").unwrap()],
+                    ),
+                )
+        );
+    }
+}
diff --git a/src/groups/mod.rs b/src/groups/mod.rs
new file mode 100644
index 0000000..ff81bbc
--- /dev/null
+++ b/src/groups/mod.rs
@@ -0,0 +1,3 @@
+pub mod groups;
+pub mod group;
+pub mod init;
\ No newline at end of file