hashtags working

Signed-off-by: William Casarin <jb55@jb55.com>

damus/Models/Mentions.swift

@@ -68,7 +68,7 @@ func render_blocks(blocks: [Block]) -> String {
         case .text(let txt):
             return str + txt
         case .hashtag(let htag):
-            return "#" + htag
+            return str + "#" + htag
         }
     }
 }
@@ -236,6 +236,9 @@ func make_post_tags(post_blocks: [PostBlock], tags: [[String]]) -> PostTags {
                 let block = Block.mention(mention)
                 blocks.append(block)
             }
+        case .hashtag(let hashtag):
+            new_tags.append(["hashtag", hashtag])
+            blocks.append(.hashtag(hashtag))
         case .text(let txt):
             blocks.append(Block.text(txt))
         }

damus/Models/Post.swift

@@ -57,6 +57,10 @@ func parse_post_blocks(content: String) -> [PostBlock] {
             blocks.append(parse_post_textblock(str: p.str, from: starting_from, to: pre_mention))
             blocks.append(.ref(reference))
             starting_from = p.pos
+        } else if let hashtag = parse_hashtag(p) {
+            blocks.append(parse_post_textblock(str: p.str, from: starting_from, to: pre_mention))
+            blocks.append(.hashtag(hashtag))
+            starting_from = p.pos
         } else {
             p.pos += 1
         }

damus/Models/PostBlock.swift

@@ -10,6 +10,7 @@ import Foundation
 enum PostBlock {
     case text(String)
     case ref(ReferencedId)
+    case hashtag(String)
     
     var is_text: Bool {
         if case .text = self {
@@ -18,6 +19,13 @@ enum PostBlock {
         return false
     }
     
+    var is_hashtag: Bool {
+        if case .hashtag = self {
+            return true
+        }
+        return false
+    }
+    
     var is_ref: Bool {
         if case .ref = self {
             return true

damus/Models/SearchModel.swift

@@ -11,7 +11,7 @@ import Foundation
 class SearchModel: ObservableObject {
     @Published var events: [NostrEvent] = []
     let pool: RelayPool
-    let search: NostrFilter
+    var search: NostrFilter
     let sub_id = UUID().description
     
     init(pool: RelayPool, search: NostrFilter) {
@@ -20,15 +20,15 @@ class SearchModel: ObservableObject {
     }
     
     func subscribe() {
-        // since 2 month
-        var filter = NostrFilter.copy(from: search)
-        filter.since = Int64(Date.now.timeIntervalSince1970) - 2629800 * 2
+        // since 1 month
+        search.since = Int64(Date.now.timeIntervalSince1970) - 2629800 * 1
+        search.kinds = [1,5,7]
 
         //likes_filter.ids = ref_events.referenced_ids!
 
-        print("subscribing to search '\(filter)' with sub_id \(sub_id)")
+        print("subscribing to search '\(search)' with sub_id \(sub_id)")
         pool.register_handler(sub_id: sub_id, handler: handle_event)
-        pool.send(.subscribe(.init(filters: [filter], sub_id: sub_id)))
+        pool.send(.subscribe(.init(filters: [search], sub_id: sub_id)))
     }
     
     func unsubscribe() {
@@ -37,6 +37,10 @@ class SearchModel: ObservableObject {
     }
     
     func add_event(_ ev: NostrEvent) {
+        if !event_matches_filter(ev, filter: search) {
+            return
+        }
+        
         if insert_uniq_sorted_event(events: &self.events, new_ev: ev) {
             objectWillChange.send()
         }
@@ -51,6 +55,23 @@ class SearchModel: ObservableObject {
     }
 }
 
+func event_matches_hashtag(_ ev: NostrEvent, hashtags: [String]) -> Bool {
+    for tag in ev.tags {
+        if tag.count >= 2 && tag[0] == "hashtag" {
+            if hashtags.contains(tag[1]) {
+                return true
+            }
+        }
+    }
+    return false
+}
+
+func event_matches_filter(_ ev: NostrEvent, filter: NostrFilter) -> Bool {
+    if let hashtags = filter.hashtag {
+        return event_matches_hashtag(ev, hashtags: hashtags)
+    }
+    return true
+}
 
 func handle_subid_event(pool: RelayPool, sub_id: String, relay_id: String, ev: NostrConnectionEvent, handle: (NostrEvent) -> ()) {
         switch ev {

damus/Views/SearchView.swift

@@ -10,17 +10,31 @@ import SwiftUI
 struct SearchView: View {
     let appstate: DamusState
     @StateObject var search: SearchModel
+    @Environment(\.dismiss) var dismiss
     
     var body: some View {
         TimelineView(events: $search.events, damus: appstate)
-        .padding([.leading, .trailing], 6)
-        .onAppear() {
-            search.subscribe()
-        }
-        .onDisappear() {
-            search.unsubscribe()
+            .navigationBarTitle(describe_search(search.search))
+            .padding([.leading, .trailing], 6)
+            .onReceive(handle_notify(.switched_timeline)) { obj in
+                dismiss()
+            }
+            .onAppear() {
+                search.subscribe()
+            }
+            .onDisappear() {
+                search.unsubscribe()
+            }
+    }
+}
+
+func describe_search(_ filter: NostrFilter) -> String {
+    if let hashtags = filter.hashtag {
+        if hashtags.count >= 1 {
+            return "#" + hashtags[0]
         }
     }
+    return "Search"
 }
 
 /*

damusTests/damusTests.swift

@@ -71,6 +71,21 @@ class damusTests: XCTestCase {
         XCTAssertEqual(parsed.count, 0)
     }
     
+    func testMakeHashtagPost() {
+        let privkey = "d05f5fcceef3e4529703f62a29222d6ee2d1b7bf1f24729b5e01df7c633cec8a"
+        let pubkey = "6e59d3b78b1c1490a6489c94405873b57d8ef398a830ae5e39608f4107e9a790"
+        let post = NostrPost(content: "#damus some content #bitcoin derp", references: [])
+        let ev = post_to_event(post: post, privkey: privkey, pubkey: pubkey)
+        
+        XCTAssertEqual(ev.tags.count, 2)
+        XCTAssertEqual(ev.content, "#damus some content #bitcoin derp")
+        XCTAssertEqual(ev.tags[0][0], "hashtag")
+        XCTAssertEqual(ev.tags[0][1], "damus")
+        XCTAssertEqual(ev.tags[1][0], "hashtag")
+        XCTAssertEqual(ev.tags[1][1], "bitcoin")
+        
+    }
+    
     func testParseHashtag() {
         let parsed = parse_mentions(content: "some hashtag #bitcoin derp", tags: [])